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1. Overview of the Medium and High Frequency Telescopes of the LiteBIRD Satellite Mission

Author: L. Montier, B. Mot, P. de Bernardis, B. Maffei, G. Pisano, F. Columbro, J. E. Gudmundsson, S. Henrot-Versillé, L. Lamagna, J. Montgomery, T. Prouvé, M. Russell, G. Savini, S. Stever, K. L. Thompson, M. Tsujimoto, C. Tucker, B. Westbrook, P. A.R. Ade, A. Adler, E. Allys, K. Arnold, D. Auguste, J. Aumont, R. Aurlien, J. Austermann, C. Baccigalupi, A. J. Banda, R. Banerji, R. B. Barreiro, S. Basak, J. Beall, D. Beck, S. Beckman, J. Bermejo, M. Bersanelli, J. Bonis, J. Borrill, F. Boulanger, S. Bounissou, M. Brilenkov, M. Brown, M. Bucher, E. Calabrese, P. Campeti, A. Carones, F. J. Casas, A. Challinor, V. Chan, K. Cheung, Y. Chinone, J. F. Cliché, L. Colombo, J. Cubas, A. Cukierman, D. Curtis, G. D’Alessandro, N. Dachlythra, M. De Petris, C. Dickinson, P. Diego-Palazuelos, M. Dobbs, T. Dotani, L. Duband, S. Duff, J. M. Duval, K. Ebisawa, T. Elleflot, H. K. Eriksen, J. Errard, T. Essinger-Hileman, F. Finelli, R. Flauger, C. Franceschet, U. Fuskeland, M. Galloway, K. Ganga, J. R. Gao, R. Genova-Santos, M. Gerbino, M. Gervasi, T. Ghigna, E. Gjerløw, M. L. Gradziel, J. Grain, F. Grupp, A. Gruppuso, T. de Haan, N. W. Halverson, P. Hargrave, T. Hasebe, M. Hasegawa, M. Hattori, M. Hazumi, D. Herman, D. Herranz, C. A. Hill, G. Hilton, Y. Hirota, E. Hivon, R. A. Hlozek, Y. Hoshino, E. de la Hoz, J. Hubmayr, K. Ichiki, T. Iida, H. Imada, K. Ishimura, H. Ishino, G. Jaehnig, T. Kaga, S. Kashima, N. Katayama, A. Kato, T. Kawasaki, R. Keskitalo, T. Kisner, Y. Kobayashi, N. Kogiso, A. Kogut, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, I. Kreykenbohm, C. L. Kuo, A. Kushino, J. V. Lanen, M. Lattanzi, A.T. Lee, C. Leloup, F. Levrier, E. Linder, T. Louis, G. Luzzi, T. Maciaszek, D. Maino, M. Maki, S. Mandelli, E. Martinez-Gonzalez, S. Masi, T. Matsumura, A. Mennella, M. Migliaccio, Y. Minami, K. Mitsuda, G. Morgante, Y. Murata, J. A. Murphy, M. Nagai, Y. Nagano, T. Nagasaki, R. Nagata, S. Nakamura, T. Namikawa, P. Natoli, S. Nerval, T. Nishibori, H. Nishino, C. O’Sullivan, H. Ogawa, S. Oguri, H. Ohsaki, I. S. Ohta, N. Okada, L. Pagano, A. Paiella, D. Paoletti, G. Patanchon, J. Peloton, F. Piacentini, G. Polenta, D. Poletti, G. Puglisi, D. Rambaud, C. Raum, S. Realini, M. Reinecke, M. Remazeilles, A. Ritacco, G. Roudil, J. A. Rubino-Martin, H. Sakurai, Y. Sakurai, M. Sandri, M. Sasaki, D. Scott, J. Seibert, Y. Sekimoto, B. Sherwin, K. Shinozaki, M. Shiraishi, P. J. Shirron, G. Signorelli, G. Smecher, R. Stompor, H. Sugai, S. Sugiyama, A. Suzuki, J. Suzuki, T. L. Svalheim, E. Switzer, R. Takaku, H. Takakura, S. Takakura, Y. Takase, Y. Takeda, A. Tartari, E. Taylor, Y. Terao, H. Thommesen, B. Thorne, T. Toda, M. Tomasi, M. Tominaga, N. Trappe, M. Tristram, M. Tsuji, J. Ullom, G. Vermeulen, P. Vielva, F. Villa, M. Vissers, N. Vittorio, I. Wehus, J. Weller, J. Wilms, B. Winter, E. J. Wollack, N. Y. Yamasaki, T. Yoshida, J. Yumoto, M. Zannoni, and A. Zonca
Subjects: Instrumentation And Photography, Astrophysics
Abstract: LiteBIRD is a JAXA-led Strategic Large-Class mission designed to search for the existence of the primordial gravitational waves produced during the inflationary phase of the Universe, through the measurements of their imprint onto the polarization of the cosmic microwave background (CMB). These measurements, requiring unprecedented sensitivity, will be performed over the full sky, at large angular scales, and over 15 frequency bands from 34 GHz to 448 GHz. The LiteBIRD instruments consist of three telescopes, namely the Low-, Medium- and High-Frequency Telescope (respectively LFT, MFT and HFT). We present in this paper an overview of the design of the Medium-Frequency Telescope (89–224 GHz) and the High-Frequency Telescope (166–448 GHz), the so-called MHFT, under European responsibility, which are two cryogenic refractive telescopes cooled down to 5 K. They include a continuous rotating half-wave plate as the first optical element, two high-density polyethylene (HDPE) lenses and more than three thousand transition-edge sensor (TES) detectors cooled to 100 mK. We provide an overview of the concept design and the remaining specific challenges that we have to face in order to achieve the scientific goals of LiteBIRD.
Published: 2020
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2. Optical Characterization of OMT-Coupled TES Bolometers for LiteBIRD

Author: J. Hubmayr, P. A. R. Ade, A. Adler, E. Allys, D. Alonso, K. Arnold, D. Auguste, J. Aumont, R. Aurlien, J. E. Austermann, S. Azzoni, C. Baccigalupi, A. J. Banday, R. Banerji, R. B. Barreiro, N. Bartolo, S. Basak, E. Battistelli, L. Bautista, J. A. Beall, D. Beck, S. Beckman, K. Benabed, J. Bermejo-Ballesteros, M. Bersanelli, J. Bonis, J. Borrill, F. Bouchet, F. Boulanger, S. Bounissou, M. Brilenkov, M. L. Brown, M. Bucher, E. Calabrese, M. Calvo, P. Campeti, A. Carones, F. J. Casas, A. Catalano, A. Challinor, V. Chan, K. Cheung, Y. Chinone, C. Chiocchetta, S. E. Clark, L. Clermont, S. Clesse, J. Cliche, F. Columbro, J. A. Connors, A. Coppolecchia, W. Coulton, J. Cubas, A. Cukierman, D. Curtis, F. Cuttaia, G. D’Alessandro, K. Dachlythra, P. de Bernardis, T. de Haan, E. de la Hoz, M. De Petris, S. Della Torre, J. J. Daz Garca, C. Dickinson, P. Diego-Palazuelos, M. Dobbs, T. Dotani, D. Douillet, E. Doumayrou, L. Duband, A. Ducout, S. M. Duff, J. M. Duval, K. Ebisawa, T. Elleflot, H. K. Eriksen, J. Errard, T. Essinger-Hileman, S. Farrens, F. Finelli, R. Flauger, K. Fleury-Frenette, C. Franceschet, U. Fuskeland, L. Galli, S. Galli, M. Galloway, K. Ganga, J. R. Gao, R. T. Genova-Santos, M. Georges, M. Gerbino, M. Gervasi, T. Ghigna, S. Giardiello, E. Gjerlw, R. Gonzlez Gonzles, M. L. Gradziel, J. Grain, L. Grandsire, F. Grupp, A. Gruppuso, J. E. Gudmundsson, N. W. Halverson, J. Hamilton, P. Hargrave, T. Hasebe, M. Hasegawa, M. Hattori, M. Hazumi, S. Henrot-Versill, B. Hensley, D. Herman, D. Herranz, G. C. Hilton, E. Hivon, R. A. Hlozek, D. Hoang, A. L. Hornsby, Y. Hoshino, K. Ichiki, T. Iida, T. Ikemoto, H. Imada, K. Ishimura, H. Ishino, G. Jaehnig, M. Jones, T. Kaga, S. Kashima, N. Katayama, A. Kato, T. Kawasaki, R. Keskitalo, C. Kintziger, T. Kisner, Y. Kobayashi, N. Kogiso, A. Kogut, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, I. Kreykenbohm, C. L. Kuo, A. Kushino, L. Lamagna, J. V. Lanen, G. Laquaniello, M. Lattanzi, A. T. Lee, C. Leloup, F. Levrier, E. Linder, M. J. Link, A. I. Lonappan, T. Louis, G. Luzzi, J. Macias-Perez, T. Maciaszek, B. Maffei, D. Maino, M. Maki, S. Mandelli, M. Maris, B. Marquet, E. Martnez-Gonzlez, F. A. Martire, S. Masi, M. Massa, M. Masuzawa, S. Matarrese, F. T. Matsuda, T. Matsumura, L. Mele, A. Mennella, M. Migliaccio, Y. Minami, K. Mitsuda, A. Moggi, M. Monelli, A. Monfardini, J. Montgomery, L. Montier, G. Morgante, B. Mot, Y. Murata, J. A. Murphy, M. Nagai, Y. Nagano, T. Nagasaki, R. Nagata, S. Nakamura, R. Nakano, T. Namikawa, F. Nati, P. Natoli, S. Nerval, N. Neto Godry Farias, T. Nishibori, H. Nishino, F. Noviello, G. C. O’Neil, C. O’Sullivan, K. Odagiri, H. Ochi, H. Ogawa, S. Oguri, H. Ohsaki, I. S. Ohta, N. Okada, L. Pagano, A. Paiella, D. Paoletti, G. Pascual Cisneros, A. Passerini, G. Patanchon, V. Pelgrim, J. Peloton, V. Pettorino, F. Piacentini, M. Piat, G. Piccirilli, F. Pinsard, G. Pisano, J. Plesseria, G. Polenta, D. Poletti, T. Prouv, G. Puglisi, D. Rambaud, C. Raum, S. Realini, M. Reinecke, C. D. Reintsema, M. Remazeilles, A. Ritacco, P. Rosier, G. Roudil, J. Rubino-Martin, M. Russell, H. Sakurai, Y. Sakurai, M. Sandri, M. Sasaki, G. Savini, D. Scott, J. Seibert, Y. Sekimoto, B. Sherwin, K. Shinozaki, M. Shiraishi, P. Shirron, A. Shitvov, G. Signorelli, G. Smecher, F. Spinella, J. Starck, S. Stever, R. Stompor, R. Sudiwala, S. Sugiyama, R. Sullivan, A. Suzuki, J. Suzuki, T. Suzuki, T. L. Svalheim, E. Switzer, R. Takaku, H. Takakura, S. Takakura, Y. Takase, Y. Takeda, A. Tartari, D. Tavagnacco, A. Taylor, E. Taylor, Y. Terao, L. Terenzi, J. Thermeau, H. Thommesen, K. L. Thompson, B. Thorne, T. Toda, M. Tomasi, M. Tominaga, N. Trappe, M. Tristram, M. Tsuji, M. Tsujimoto, C. Tucker, R. Ueki, J. N. Ullom, K. Umemori, L. Vacher, J. Van Lanen, G. Vermeulen, P. Vielva, F. Villa, M. R. Vissers, N. Vittorio, B. Wandelt, W. Wang, I. K. Wehus, J. Weller, B. Westbrook, G. Weymann-Despres, J. Wilms, B. Winter, E. J. Wollack, N. Y. Yamasaki, T. Yoshida, J. Yumoto, K. Watanuki, A. Zacchei, M. Zannoni, A. Zonca, Hubmayr, J, Ade, P, Adler, A, Allys, E, Alonso, D, Arnold, K, Auguste, D, Aumont, J, Aurlien, R, Austermann, J, Azzoni, S, Baccigalupi, C, Banday, A, Banerji, R, Barreiro, R, Bartolo, N, Basak, S, Battistelli, E, Bautista, L, Beall, J, Beck, D, Beckman, S, Benabed, K, Bermejo-Ballesteros, J, Bersanelli, M, Bonis, J, Borrill, J, Bouchet, F, Boulanger, F, Bounissou, S, Brilenkov, M, Brown, M, Bucher, M, Calabrese, E, Calvo, M, Campeti, P, Carones, A, Casas, F, Catalano, A, Challinor, A, Chan, V, Cheung, K, Chinone, Y, Chiocchetta, C, Clark, S, Clermont, L, Clesse, S, Cliche, J, Columbro, F, Connors, J, Coppolecchia, A, Coulton, W, Cubas, J, Cukierman, A, Curtis, D, Cuttaia, F, D’Alessandro, G, Dachlythra, K, de Bernardis, P, de Haan, T, de la Hoz, E, De Petris, M, Della Torre, S, Daz Garca, J, Dickinson, C, Diego-Palazuelos, P, Dobbs, M, Dotani, T, Douillet, D, Doumayrou, E, Duband, L, Ducout, A, Duff, S, Duval, J, Ebisawa, K, Elleflot, T, Eriksen, H, Errard, J, Essinger-Hileman, T, Farrens, S, Finelli, F, Flauger, R, Fleury-Frenette, K, Franceschet, C, Fuskeland, U, Galli, L, Galli, S, Galloway, M, Ganga, K, Gao, J, Genova-Santos, R, Georges, M, Gerbino, M, Gervasi, M, Ghigna, T, Giardiello, S, Gjerlw, E, Gonzles, R, Gradziel, M, Grain, J, Grandsire, L, Grupp, F, Gruppuso, A, Gudmundsson, J, Halverson, N, Hamilton, J, Hargrave, P, Hasebe, T, Hasegawa, M, Hattori, M, Hazumi, M, Henrot-Versill, S, Hensley, B, Herman, D, Herranz, D, Hilton, G, Hivon, E, Hlozek, R, Hoang, D, Hornsby, A, Hoshino, Y, Ichiki, K, Iida, T, Ikemoto, T, Imada, H, Ishimura, K, Ishino, H, Jaehnig, G, Jones, M, Kaga, T, Kashima, S, Katayama, N, Kato, A, Kawasaki, T, Keskitalo, R, Kintziger, C, Kisner, T, Kobayashi, Y, Kogiso, N, Kogut, A, Kohri, K, Komatsu, E, Komatsu, K, Konishi, K, Krachmalnicoff, N, Kreykenbohm, I, Kuo, C, Kushino, A, Lamagna, L, Lanen, J, Laquaniello, G, Lattanzi, M, Lee, A, Leloup, C, Levrier, F, Linder, E, Link, M, Lonappan, A, Louis, T, Luzzi, G, Macias-Perez, J, Maciaszek, T, Maffei, B, Maino, D, Maki, M, Mandelli, S, Maris, M, Marquet, B, Martnez-Gonzlez, E, Martire, F, Masi, S, Massa, M, Masuzawa, M, Matarrese, S, Matsuda, F, Matsumura, T, Mele, L, Mennella, A, Migliaccio, M, Minami, Y, Mitsuda, K, Moggi, A, Monelli, M, Monfardini, A, Montgomery, J, Montier, L, Morgante, G, Mot, B, Murata, Y, Murphy, J, Nagai, M, Nagano, Y, Nagasaki, T, Nagata, R, Nakamura, S, Nakano, R, Namikawa, T, Nati, F, Natoli, P, Nerval, S, Neto Godry Farias, N, Nishibori, T, Nishino, H, Noviello, F, O’Neil, G, O’Sullivan, C, Odagiri, K, Ochi, H, Ogawa, H, Oguri, S, Ohsaki, H, Ohta, I, Okada, N, Pagano, L, Paiella, A, Paoletti, D, Pascual Cisneros, G, Passerini, A, Patanchon, G, Pelgrim, V, Peloton, J, Pettorino, V, Piacentini, F, Piat, M, Piccirilli, G, Pinsard, F, Pisano, G, Plesseria, J, Polenta, G, Poletti, D, Prouv, T, Puglisi, G, Rambaud, D, Raum, C, Realini, S, Reinecke, M, Reintsema, C, Remazeilles, M, Ritacco, A, Rosier, P, Roudil, G, Rubino-Martin, J, Russell, M, Sakurai, H, Sakurai, Y, Sandri, M, Sasaki, M, Savini, G, Scott, D, Seibert, J, Sekimoto, Y, Sherwin, B, Shinozaki, K, Shiraishi, M, Shirron, P, Shitvov, A, Signorelli, G, Smecher, G, Spinella, F, Starck, J, Stever, S, Stompor, R, Sudiwala, R, Sugiyama, S, Sullivan, R, Suzuki, A, Suzuki, J, Suzuki, T, Svalheim, T, Switzer, E, Takaku, R, Takakura, H, Takakura, S, Takase, Y, Takeda, Y, Tartari, A, Tavagnacco, D, Taylor, A, Taylor, E, Terao, Y, Terenzi, L, Thermeau, J, Thommesen, H, Thompson, K, Thorne, B, Toda, T, Tomasi, M, Tominaga, M, Trappe, N, Tristram, M, Tsuji, M, Tsujimoto, M, Tucker, C, Ueki, R, Ullom, J, Umemori, K, Vacher, L, Van Lanen, J, Vermeulen, G, Vielva, P, Villa, F, Vissers, M, Vittorio, N, Wandelt, B, Wang, W, Wehus, I, Weller, J, Westbrook, B, Weymann-Despres, G, Wilms, J, Winter, B, Wollack, E, Yamasaki, N, Yoshida, T, Yumoto, J, Watanuki, K, Zacchei, A, Zannoni, M, Zonca, A, and National Aeronautics and Space Administration (US)
Subjects: CMB, TES, OMT, Low temperature detector, Bolometer, FIS/05 - ASTRONOMIA E ASTROFISICA, Settore FIS/05 - Astronomia e Astrofisica, General Materials Science, Condensed Matter Physics, CMB, TES, OMT, Low temperature detector, Bolometer, Atomic and Molecular Physics, and Optics
Abstract: et al., Feedhorn- and orthomode transducer- (OMT) coupled transition edge sensor (TES) bolometers have been designed and micro-fabricated to meet the optical specifications of the LiteBIRD high frequency telescope (HFT) focal plane. We discuss the design and optical characterization of two LiteBIRD HFT detector types: dual-polarization, dual-frequency-band pixels with 195/280 GHz and 235/337 GHz band centers. Results show well-matched passbands between orthogonal polarization channels and frequency centers within 3% of the design values. The optical efficiency of each frequency channel is conservatively reported to be within the range 0.64−0.72, determined from the response to a cryogenic, temperature-controlled thermal source. These values are in good agreement with expectations and either exceed or are within 10% of the values used in the LiteBIRD sensitivity forecast. Lastly, we report a measurement of loss in Nb/SiNx/Nb microstrip at 100 mK and over the frequency range 200–350 GHz, which is comparable to values previously reported in the literature., This work is supported by NASA under grant no. 80NSSC18K0132.
Published: 2022

3. Updated design of the CMB polarization experiment satellite LiteBIRD

Author: H. Sugai, P. A. R. Ade, Y. Akiba, D. Alonso, K. Arnold, J. Aumont, J. Austermann, C. Baccigalupi, A. J. Banday, R. Banerji, R. B. Barreiro, S. Basak, J. Beall, S. Beckman, M. Bersanelli, J. Borrill, F. Boulanger, M. L. Brown, M. Bucher, A. Buzzelli, E. Calabrese, F. J. Casas, A. Challinor, V. Chan, Y. Chinone, J.-F. Cliche, F. Columbro, A. Cukierman, D. Curtis, P. Danto, P. de Bernardis, T. de Haan, M. De Petris, C. Dickinson, M. Dobbs, T. Dotani, L. Duband, A. Ducout, S. Duff, A. Duivenvoorden, J.-M. Duval, K. Ebisawa, T. Elleflot, H. Enokida, H. K. Eriksen, J. Errard, T. Essinger-Hileman, F. Finelli, R. Flauger, C. Franceschet, U. Fuskeland, K. Ganga, J.-R. Gao, R. Génova-Santos, T. Ghigna, A. Gomez, M. L. Gradziel, J. Grain, F. Grupp, A. Gruppuso, J. E. Gudmundsson, N. W. Halverson, P. Hargrave, T. Hasebe, M. Hasegawa, M. Hattori, M. Hazumi, S. Henrot-Versille, D. Herranz, C. Hill, G. Hilton, Y. Hirota, E. Hivon, R. Hlozek, D.-T. Hoang, J. Hubmayr, K. Ichiki, T. Iida, H. Imada, K. Ishimura, H. Ishino, G. C. Jaehnig, M. Jones, T. Kaga, S. Kashima, Y. Kataoka, N. Katayama, T. Kawasaki, R. Keskitalo, A. Kibayashi, T. Kikuchi, K. Kimura, T. Kisner, Y. Kobayashi, N. Kogiso, A. Kogut, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, C. L. Kuo, N. Kurinsky, A. Kushino, M. Kuwata-Gonokami, L. Lamagna, M. Lattanzi, A. T. Lee, E. Linder, B. Maffei, D. Maino, M. Maki, A. Mangilli, E. Martínez-González, S. Masi, R. Mathon, T. Matsumura, A. Mennella, M. Migliaccio, Y. Minami, K. Mistuda, D. Molinari, L. Montier, G. Morgante, B. Mot, Y. Murata, J. A. Murphy, M. Nagai, R. Nagata, S. Nakamura, T. Namikawa, P. Natoli, S. Nerval, T. Nishibori, H. Nishino, Y. Nomura, F. Noviello, C. O’Sullivan, H. Ochi, H. Ogawa, H. Ohsaki, I. Ohta, N. Okada, L. Pagano, A. Paiella, D. Paoletti, G. Patanchon, F. Piacentini, G. Pisano, G. Polenta, D. Poletti, T. Prouvé, G. Puglisi, D. Rambaud, C. Raum, S. Realini, M. Remazeilles, G. Roudil, J. A. Rubiño-Martín, M. Russell, H. Sakurai, Y. Sakurai, M. Sandri, G. Savini, D. Scott, Y. Sekimoto, B. D. Sherwin, K. Shinozaki, M. Shiraishi, P. Shirron, G. Signorelli, G. Smecher, P. Spizzi, S. L. Stever, R. Stompor, S. Sugiyama, A. Suzuki, J. Suzuki, E. Switzer, R. Takaku, H. Takakura, S. Takakura, Y. Takeda, A. Taylor, E. Taylor, Y. Terao, K. L. Thompson, B. Thorne, M. Tomasi, H. Tomida, N. Trappe, M. Tristram, M. Tsuji, M. Tsujimoto, C. Tucker, J. Ullom, S. Uozumi, S. Utsunomiya, J. Van Lanen, G. Vermeulen, P. Vielva, F. Villa, M. Vissers, N. Vittorio, F. Voisin, I. Walker, N. Watanabe, I. Wehus, J. Weller, B. Westbrook, B. Winter, E. Wollack, R. Yamamoto, N. Y. Yamasaki, M. Yanagisawa, T. Yoshida, J. Yumoto, M. Zannoni, A. Zonca, Sugai, H, Ade, P, Akiba, Y, Alonso, D, Arnold, K, Aumont, J, Austermann, J, Baccigalupi, C, Banday, A, Banerji, R, Barreiro, R, Basak, S, Beall, J, Beckman, S, Bersanelli, M, Borrill, J, Boulanger, F, Brown, M, Bucher, M, Buzzelli, A, Calabrese, E, Casas, F, Challinor, A, Chan, V, Chinone, Y, Cliche, J, Columbro, F, Cukierman, A, Curtis, D, Danto, P, de Bernardis, P, de Haan, T, De Petris, M, Dickinson, C, Dobbs, M, Dotani, T, Duband, L, Ducout, A, Duff, S, Duivenvoorden, A, Duval, J, Ebisawa, K, Elleflot, T, Enokida, H, Eriksen, H, Errard, J, Essinger-Hileman, T, Finelli, F, Flauger, R, Franceschet, C, Fuskeland, U, Ganga, K, Gao, J, Génova-Santos, R, Ghigna, T, Gomez, A, Gradziel, M, Grain, J, Grupp, F, Gruppuso, A, Gudmundsson, J, Halverson, N, Hargrave, P, Hasebe, T, Hasegawa, M, Hattori, M, Hazumi, M, Henrot-Versille, S, Herranz, D, Hill, C, Hilton, G, Hirota, Y, Hivon, E, Hlozek, R, Hoang, D, Hubmayr, J, Ichiki, K, Iida, T, Imada, H, Ishimura, K, Ishino, H, Jaehnig, G, Jones, M, Kaga, T, Kashima, S, Kataoka, Y, Katayama, N, Kawasaki, T, Keskitalo, R, Kibayashi, A, Kikuchi, T, Kimura, K, Kisner, T, Kobayashi, Y, Kogiso, N, Kogut, A, Kohri, K, Komatsu, E, Komatsu, K, Konishi, K, Krachmalnicoff, N, Kuo, C, Kurinsky, N, Kushino, A, Kuwata-Gonokami, M, Lamagna, L, Lattanzi, M, Lee, A, Linder, E, Maffei, B, Maino, D, Maki, M, Mangilli, A, Martínez-González, E, Masi, S, Mathon, R, Matsumura, T, Mennella, A, Migliaccio, M, Minami, Y, Mistuda, K, Molinari, D, Montier, L, Morgante, G, Mot, B, Murata, Y, Murphy, J, Nagai, M, Nagata, R, Nakamura, S, Namikawa, T, Natoli, P, Nerval, S, Nishibori, T, Nishino, H, Nomura, Y, Noviello, F, O’Sullivan, C, Ochi, H, Ogawa, H, Ohsaki, H, Ohta, I, Okada, N, Pagano, L, Paiella, A, Paoletti, D, Patanchon, G, Piacentini, F, Pisano, G, Polenta, G, Poletti, D, Prouvé, T, Puglisi, G, Rambaud, D, Raum, C, Realini, S, Remazeilles, M, Roudil, G, Rubiño-Martín, J, Russell, M, Sakurai, H, Sakurai, Y, Sandri, M, Savini, G, Scott, D, Sekimoto, Y, Sherwin, B, Shinozaki, K, Shiraishi, M, Shirron, P, Signorelli, G, Smecher, G, Spizzi, P, Stever, S, Stompor, R, Sugiyama, S, Suzuki, A, Suzuki, J, Switzer, E, Takaku, R, Takakura, H, Takakura, S, Takeda, Y, Taylor, A, Taylor, E, Terao, Y, Thompson, K, Thorne, B, Tomasi, M, Tomida, H, Trappe, N, Tristram, M, Tsuji, M, Tsujimoto, M, Tucker, C, Ullom, J, Uozumi, S, Utsunomiya, S, Van Lanen, J, Vermeulen, G, Vielva, P, Villa, F, Vissers, M, Vittorio, N, Voisin, F, Walker, I, Watanabe, N, Wehus, I, Weller, J, Westbrook, B, Winter, B, Wollack, E, Yamamoto, R, Yamasaki, N, Yanagisawa, M, Yoshida, T, Yumoto, J, Zannoni, M, Zonca, A, World Premier International Research Center (Japan), Japan Society for the Promotion of Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Agenzia Spaziale Italiana, Istituto Nazionale di Fisica Nucleare, Centre National D'Etudes Spatiales (France), Centre National de la Recherche Scientifique (France), Commissariat à l'Ènergie Atomique et aux Ènergies Alternatives (France), European Space Agency, Canadian Space Agency, National Aeronautics and Space Administration (US), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Centre National d’Études Spatiales [Paris] (CNES), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Hélium : du fondamental aux applications (NEEL - HELFA), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Sugai, H. [0000-0001-6501-3871], and Apollo - University of Cambridge Repository
Subjects: Passive cooling, Cosmic Microwave Background, Cosmology, Polarimetry, Instrumentation, Inflation, Cosmic microwave background, cosmic background radiation: polarization, 7. Clean energy, 01 natural sciences, Polarization, General Materials Science, 010303 astronomy & astrophysics, media_common, Physics, Settore FIS/01, Settore FIS/05, Astrophysics::Instrumentation and Methods for Astrophysics, suppression, Condensed Matter Physics, Polarization (waves), Atomic and Molecular Physics, and Optics, Infation, adiabatic, Astrophysics - Instrumentation and Methods for Astrophysics, signature, Astrophysics and Astronomy, media_common.quotation_subject, Lagrangian point, Inflation, Primordial gravitational wave, Satellite, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Noise (electronics), Article, NO, FIS/05 - ASTRONOMIA E ASTROFISICA, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, noise: thermal, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Instrumentation and Methods for Astrophysics (astro-ph.IM), 010308 nuclear & particles physics, Gravitational wave, PE9_14, beam: width, gravitational radiation: primordial, Astronomy, 13. Climate action, Sky, spectral, galaxy, astro-ph.IM
Abstract: H. Sugai, et al., Recent developments of transition-edge sensors (TESs), based on extensive experience in ground-based experiments, have been making the sensor techniques mature enough for their application on future satellite cosmic microwave background (CMB) polarization experiments. LiteBIRD is in the most advanced phase among such future satellites, targeting its launch in Japanese Fiscal Year 2027 (2027FY) with JAXA’s H3 rocket. It will accommodate more than 4000 TESs in focal planes of reflective low-frequency and refractive medium-and-high-frequency telescopes in order to detect a signature imprinted on the CMB by the primordial gravitational waves predicted in cosmic inflation. The total wide frequency coverage between 34 and 448 GHz enables us to extract such weak spiral polarization patterns through the precise subtraction of our Galaxy’s foreground emission by using spectral differences among CMB and foreground signals. Telescopes are cooled down to 5 K for suppressing thermal noise and contain polarization modulators with transmissive half-wave plates at individual apertures for separating sky polarization signals from artificial polarization and for mitigating from instrumental 1/f noise. Passive cooling by using V-grooves supports active cooling with mechanical coolers as well as adiabatic demagnetization refrigerators. Sky observations from the second Sun–Earth Lagrangian point, L2, are planned for 3 years. An international collaboration between Japan, the USA, Canada, and Europe is sharing various roles. In May 2019, the Institute of Space and Astronautical Science, JAXA, selected LiteBIRD as the strategic large mission No. 2., This work was supported by World Premier International Research Center Initiative (WPI), MEXT, Japan, by JSPS Core-to-Core Program, A. Advanced Research Networks, and by JSPS KAKENHI Grant Numbers JP15H05891, JP17H01115, and JP17H01125. The Italian contribution to the LiteBIRD phase A is supported by the Italian Space Agency (ASI Grant No. 2016-24- H.1-2018) and the National Institute for Nuclear Physics (INFN). The French contribution to the LiteBIRD phase A is supported by the Centre National d’Etudes Spatiale (CNES), by the Centre National de la Recherche Scientifque (CNRS), and by the Commissariat à l’Energie Atomique (CEA). A Concurrent Design Facility study focused on the MHFT and Sub-Kelvin coolers has been led by the European Space Agency (ESA). The Canadian contribution to LiteBIRD is supported by the Canadian Space Agency. The US contribution is supported by NASA Grant no. 80NSSC18K0132
Published: 2020
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4. LiteBIRD: A Satellite for the Studies of B-Mode Polarization and Inflation from Cosmic Background Radiation Detection

Author: Josquin Errard, Kent D. Irwin, Ingunn Kathrine Wehus, Kazunori Kohri, Kam Arnold, Atsushi Okamoto, Osamu Tajima, T. Tomida, Hirokazu Ishino, L. Montier, T. Kawasaki, M. Willer, Ryo Yamamoto, Nobuhiko Katayama, B. Thorne, Eiichiro Komatsu, Takayuki Tomaru, Benjamin Westbrook, Toshiaki Iida, Tadayasu Dotani, Yuki Inoue, T. Funaki, Chiko Otani, Bruno Maffei, L. Hayes, Charles A. Hill, F. Vansyngel, T. Nagasaki, L. Duband, Tucker Elleflot, H. Imada, Johannes Hubmayr, A. Cukierman, M. Nakajima, T. Hasebe, Paul Turin, A. Dominjon, Eric V. Linder, S. Takatori, Toshifumi Shimizu, Yuto Minami, Shin Utsunomiya, Y. Sato, Yoshinori Uzawa, D. Tanabe, J. M. Duval, F. Boulanger, Takahiro Okamura, Jo Dunkley, Hiroyuki Sugita, Masato Naruse, Julian Borrill, Makoto Hattori, Theodore Kisner, Yuji Chinone, Tom Nitta, Dale Li, Mathieu Remazeilles, K. Ganga, Hideo Ogawa, Reijo Keskitalo, Masashi Hazumi, Giampaolo Pisano, E. Taylor, S. Takakura, H. Kanai, Jun-ichi Suzuki, N. Sato, Masahiro Tsujimoto, Yutaro Sekimoto, Shin-ichiro Sakai, Kimihiro Kimura, M. Nagai, N. W. Halverson, Anna Mangilli, Seongjae Cho, M. Tristram, S. A. Kernasovskiy, Jonathan Aumont, Blake D. Sherwin, Carole Tucker, Tomotake Matsumura, Kiyotomo Ichiki, Satoru Mima, T. de Haan, T. Hamada, N. Tomita, G. Patanchon, K. Komatsu, Shuji Matsuura, J. Grain, Paul L. Richards, Norio Okada, N. Hidehira, Kazuhisa Mitsuda, Soumen Basak, Yasuhiro Yamada, Aritoki Suzuki, H. K. Eriksen, Hajime Sugai, Shogo Nakamura, Peter A. R. Ade, Alex Lazarian, T. Fujino, Y. Akiba, Gabriel M. Rebeiz, H. Nishino, Nathan Whitehorn, Martin Bucher, R. Stompor, Shingo Kashima, A. Kibayashi, Y. Kida, Noah Kurinsky, D. W. Curtis, M. Inoue, Masaya Hasegawa, Adrian T. Lee, Shugo Oguri, Y. Segawa, David Alonso, A. Ducout, Carlo Baccigalupi, U. Fuskeland, S. Beckman, Uroš Seljak, R. Nagata, J. Fischer, Mitsuhiro Yoshida, K. L. Thompson, Darcy Barron, Gene C. Hilton, Noriko Y. Yamasaki, Erminia Calabrese, Neil Goeckner-Wald, R. Takaku, Suguru Takada, M. A. Dobbs, Oliver Jeong, Toshiya Namikawa, Yuki Sakurai, Chao-Lin Kuo, Kaori Hattori, Keisuke Shinozaki, D. Meilhan, M. Maki, Makoto Sawada, D. Kaneko, T. Yamashita, S. Uozumi, Takashi Noguchi, Akito Kusaka, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Service des Basses Températures (SBT ), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire des Cryoréfrigérateurs et Cryogénie Spatiale (LCCS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: detector: cryogenics, Cosmic microwave background, Cosmic background radiation, cosmic background radiation: polarization, Lagrangian point, B-mode polarization, Cosmic inflation, Primordial gravitational wave, Quantum gravity, Satellite, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, 010305 fluids & plasmas, law.invention, Telescope, Settore FIS/05 - Astronomia e Astrofisica, bolometer, law, 0103 physical sciences, General Materials Science, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], detector: optical, 010306 general physics, Physics, Bolometer, gravitational radiation: primordial, Astrophysics::Instrumentation and Methods for Astrophysics, Condensed Matter Physics, Polarization (waves), inflation: model, Atomic and Molecular Physics, and Optics, detector: sensitivity, modulation, Cardinal point, B-mode, angular resolution, moment: multipole, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Multipole expansion
Abstract: 著者人数: 152名(所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 羽澄, 昌史; 堂谷, 忠靖; 長谷部, 孝; 今田, 大皓; 満田, 和久; 坂井, 真一郎; 関本, 裕太郎; Tomida, T.; 辻本, 匡弘; Yamamoto, R.; 山崎, 典子), Accepted: 2019-01-18, 資料番号: SA1180402000
Published: 2019
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5. Secondary CMB anisotropies from magnetized haloes - I. Power spectra of the Faraday rotation angle and conversion rate

Author: F. Lacasa, G. Hurier, N. Lemarchand, Agnès Ferté, J. Grain, Institut d'astrophysique spatiale (IAS), and Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics, Electron, Astrophysics::Cosmology and Extragalactic Astrophysics, cosmic background radiation, Rotation, 7. Clean energy, 01 natural sciences, law.invention, symbols.namesake, law, cosmology: theory, 0103 physical sciences, Faraday effect, Faraday cage, 010303 astronomy & astrophysics, Circular polarization, Physics, 010308 nuclear & particles physics, Linear polarization, Astronomy and Astrophysics, 3. Good health, Magnetic field, Computational physics, 13. Climate action, Space and Planetary Science, symbols, Halo, large-scale structure of Universe, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Magnetized plasmas within halos of galaxies leave their footprint on the polarized anisotropies of the cosmic microwave background. The two dominant effects for astrophysical halos are Faraday rotation generating rotation of the plane of linear polarization, and Faraday conversion inducing a leakage from linear polarization to circular polarization. We revisit these sources of secondary anisotropies by computing the angular power spectra of the Faraday rotation angle and of the Faraday conversion rate by the large scale structures. To this end, we use the halo model and we pay special attention to the impact of magnetic field projections. Assuming magnetic fields of halos to be uncorrelated, we found a vanishing 2-halo term, and angular power spectra peaking at multipoles $\ell\sim10^4$. The Faraday rotation angle is dominated by the contribution of thermal electrons. For the Faraday conversion rate, we found that both thermal electrons and relativistic, non-thermal electrons contribute equally in the most optimistic case for the density and Lorentz factor of relativistic electrons, while in more pessimistic cases the thermal electrons give the dominant contribution. Assuming the magnetic field to be independent of the halo mass, the angular power spectra for both effects roughly scale with the amplitude of matter perturbations as $\sim\sigma_8^3$, and with a very mild dependence with the density of cold dark matter. Introducing a dependence of the magnetic field strength with the halo mass leads to an increase of the scaling with the amplitude of matter fluctuations, up to $\sim\sigma_8^{9.5}$ for Faraday rotation and $\sim\sigma_8^{15}$ for Faraday conversion for a magnetic field strength scaling linearly with the halo mass., Comment: 13 + 5 pages, 6 figures, 2 tables
Published: 2019
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6. Concept design of the LiteBIRD satellite for CMB B-mode polarization

Author: A. Cukierman, Makoto Hattori, Alessandro Gruppuso, Y. Kataoka, D. T. Hoang, Kam Arnold, Tucker Elleflot, Benjamin Westbrook, Eric V. Linder, Johannes Hubmayr, Toshiyuki Nishibori, Christopher Raum, T. Kikuchi, Luca Lamagna, S. Takakura, Shingo Kashima, Ryota Takaku, Ken Ganga, N. Katayama, Masahiro Tsujimoto, Yutaro Sekimoto, A. Kibayashi, Hajime Sugai, H. K. Eriksen, Noah Kurinsky, F. Columbro, Gianluca Morgante, Toshiya Namikawa, Yuki Sakurai, B. Mot, E. Martínez-González, H. Nishino, G. Jaehnig, Hiroyuki Ohsaki, Shogo Nakamura, Peter A. R. Ade, L. Montier, T. Kawasaki, Giuseppe Puglisi, Charles A. Hill, H. Takakura, Masaaki Nagai, Anna Murphy, D. W. Curtis, M. Tristram, Adrian T. Lee, J. Grain, S. Realini, H. Ochi, Peter Charles Hargrave, Theodore Kisner, Maresuke Shiraishi, F. Boulanger, Y. Kobayashi, M. Tomasi, G. Signorelli, Y. Hirota, M. Tsuji, Graeme Smecher, F. Piacentini, K. Ebisawa, S. Beckman, Carlo Baccigalupi, E. Hivon, K. Mistuda, Haruyuki Sakurai, Soumen Basak, C. L. Kuo, G. Patanchon, Ingunn Kathrine Wehus, Masashi Hazumi, J. Aumont, Berend Winter, I. S. Ohta, Reijo Keskitalo, Bruno Maffei, Ryo Yamamoto, Marco Bersanelli, Mario Zannoni, P. Natoli, Junji Yumoto, Andrea Zonca, Erminia Calabrese, A. Ducout, Blake D. Sherwin, N. Trappe, U. Fuskeland, Nicoletta Krachmalnicoff, K. L. Thompson, M. A. Dobbs, F. Noviello, Anna Mangilli, Jun-ichi Suzuki, A. Kushino, Tadayasu Dotani, S. Sugiyama, H. Kanai, T. Yoshida, Silvia Masi, G. Polenta, M. Yanagisawa, N. Watanabe, R. Nagata, J. Austermann, Keisuke Shinozaki, Yasunori Terao, Davide Poletti, Cristian Franceschet, Michael L. Brown, Anthony Challinor, M. De Petris, Masaya Hasegawa, Yuto Minami, Noriko Y. Yamasaki, L. Duband, Créidhe O'Sullivan, Yasuhiro Murata, J. R. Gao, B. Thorne, Eiichiro Komatsu, P. de Bernardis, Kazunori Kohri, Hirokazu Ishino, Kuniaki Konishi, A. J. Banday, N. W. Halverson, A. Mennella, Kiyotomo Ichiki, T. Hasebe, Giorgio Savini, Julian Borrill, Yuji Chinone, Mathieu Remazeilles, Giampaolo Pisano, D. Molinari, Radek Stompor, M. Maki, H. Tomida, N. Okada, H. Imada, S. Uozumi, Nozomu Kogiso, R. Banerji, Tomotake Matsumura, Raphael Flauger, T. Ghigna, Josquin Errard, Shin Utsunomiya, M. Bucher, K. Komatsu, Hideo Ogawa, E. Taylor, Kimihiro Kimura, Sophie Henrot-Versille, Nicola Vittorio, Aritoki Suzuki, Realini, S, Patanchon, G, Kataoka, Y, Zonca, A, Zannoni, M, Yumoto, J, Yoshida, T, Yanagisawa, M, Yamasaki, N, Yamamoto, R, Westbrook, B, Wehus, I, Watanabe, N, Vittorio, N, Utsunomiya, S, Uozumi, S, Tsujimoto, M, Tsuji, M, Tristram, M, Trappe, N, Tomida, H, Tomasi, M, Thorne, B, Thompson, K, Terao, Y, Taylor, E, Takakura, S, Takakura, H, Takaku, R, Suzuki, J, Suzuki, A, Sugiyama, S, Sugai, H, Stompor, R, Smecher, G, Signorelli, G, Shiraishi, M, Shinozaki, K, Sherwin, B, Savini, G, Sakurai, Y, Sakurai, H, Remazeilles, M, Raum, C, Puglisi, G, Poletti, D, Polenta, G, Pisano, G, Piacentini, F, Okada, N, Ohsaki, H, Ogawa, H, Ochi, H, O'Sullivan, C, Nishino, H, Nishibori, T, Natoli, P, Namikawa, T, Nakamura, S, Nagata, R, Nagai, M, Murphy, A, Murata, Y, Mot, B, Morgante, G, Montier, L, Molinari, D, Mitsuda, K, Minami, Y, Mennella, A, Matsumura, T, Masi, S, Martinez-Gonzalez, E, Maki, M, Maffei, B, Linder, E, Lee, A, Lamagna, L, Kushino, A, Kurinsky, N, Kuo, C, Krachmalnicoff, N, Konishi, K, Komatsu, K, Komatsu, E, Kohri, K, Kogiso, N, Kobayashi, Y, Kisner, T, Kimura, K, Kikuchi, T, Kibayashi, A, Keskitalo, R, Kawasaki, T, Katayama, N, Kashima, S, Kanai, H, Arnold, K, Jaehnig, G, Ishino, H, Imada, H, Ichiki, K, Hubmayr, J, Hoang, D, Hivon, E, Hirota, Y, Hill, C, Henrot-Versille, S, Hazumi, M, Hattori, M, Hasegawa, M, Hasebe, T, Hargrave, P, Halverson, N, Gruppuso, A, Grain, J, Ghigna, T, Gao, J, Ganga, K, Fuskeland, U, Franceschet, C, Flauger, R, Errand, J, Eriksen, H, Elleflot, T, Ebisawa, K, Ducout, A, Duband, L, Dotani, T, Dobbs, M, de Petris, M, de Bernardis, P, Curtis, D, Cukierman, A, Columbro, F, Chinone, Y, Challinor, A, Calabrese, E, Bucher, M, Brown, M, Boulanger, F, Borill, J, Bersanelli, M, Beckman, S, Basak, S, Banerji, R, Banday, A, Baccigalupi, C, Austermann, J, Aumont, J, Mangilli, A, Ade, P, Winter, B, Ota, I, Noviello, F, Sekimoto, Y, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Service des Basses Températures (SBT ), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and LiteBIRD
Subjects: Cosmic microwave background, Cryogenic telescope, Millimeter-wave polarization, Space program, Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications1707 Computer Vision and Pattern Recognition, Applied Mathematics, Electrical and Electronic Engineering, media_common.quotation_subject, satellite, Lagrangian point, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, frequency: high, law.invention, NO, Telescope, cosmic background radiation: B-mode, FIS/05 - ASTRONOMIA E ASTROFISICA, Settore FIS/05 - Astronomia e Astrofisica, law, 0103 physical sciences, Electronic, Cosmology, Cosmic Microwave Background, CMB, Polarimetry, Inflation, Instrumentation, structure, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Optical and Magnetic Materials, 010306 general physics, Astrophysics::Galaxy Astrophysics, media_common, Physics, polarization, 010308 nuclear & particles physics, Gravitational wave, Settore FIS/05, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Polarization (waves), sensitivity, Superconducting detectors, frequency: low, angular resolution, Sky, cryogenics, Launch vehicle, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: LiteBIRD is a candidate for JAXA’s strategic large mission to observe the cosmic microwave background (CMB) polarization over the full sky at large angular scales. It is planned to be launched in the 2020s with an H3 launch vehicle for three years of observations at a Sun-Earth Lagrangian point (L2). The concept design has been studied by researchers from Japan, U.S., Canada and Europe during the ISAS Phase-A1. Large scale measurements of the CMB B-mode polarization are known as the best probe to detect primordial gravitational waves. The goal of LiteBIRD is to measure the tensor-to-scalar ratio (r) with precision of δr < 0.001. A 3-year full sky survey will be carried out with a low frequency (34 - 161 GHz) telescope (LFT) and a high frequency (89 - 448 GHz) telescope (HFT), which achieve a sensitivity of 2.5 µK-arcmin with an angular resolution of ∼ 30 arcminutes around 100 GHz. The concept design of LiteBIRD system, payload module (PLM), cryo-structure, LFT and verification plan is described in this paper. © 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Published: 2018
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7. The LiteBIRD Satellite Mission: Sub-Kelvin Instrument

Author: A. Suzuki, P. A. R. Ade, Y. Akiba, D. Alonso, K. Arnold, J. Aumont, C. Baccigalupi, D. Barron, S. Basak, S. Beckman, J. Borrill, F. Boulanger, M. Bucher, E. Calabrese, Y. Chinone, S. Cho, B. Crill, A. Cukierman, D. W. Curtis, T. de Haan, M. Dobbs, A. Dominjon, T. Dotani, L. Duband, A. Ducout, J. Dunkley, J. M. Duval, T. Elleflot, H. K. Eriksen, J. Errard, J. Fischer, T. Fujino, T. Funaki, U. Fuskeland, K. Ganga, N. Goeckner-Wald, J. Grain, N. W. Halverson, T. Hamada, T. Hasebe, M. Hasegawa, K. Hattori, M. Hattori, L. Hayes, M. Hazumi, N. Hidehira, C. A. Hill, G. Hilton, J. Hubmayr, K. Ichiki, T. Iida, H. Imada, M. Inoue, Y. Inoue, K. D. Irwin, H. Ishino, O. Jeong, H. Kanai, D. Kaneko, S. Kashima, N. Katayama, T. Kawasaki, S. A. Kernasovskiy, R. Keskitalo, A. Kibayashi, Y. Kida, K. Kimura, T. Kisner, K. Kohri, E. Komatsu, K. Komatsu, C. L. Kuo, N. A. Kurinsky, A. Kusaka, A. Lazarian, A. T. Lee, D. Li, E. Linder, B. Maffei, A. Mangilli, M. Maki, T. Matsumura, S. Matsuura, D. Meilhan, S. Mima, Y. Minami, K. Mitsuda, L. Montier, M. Nagai, T. Nagasaki, R. Nagata, M. Nakajima, S. Nakamura, T. Namikawa, M. Naruse, H. Nishino, T. Nitta, T. Noguchi, H. Ogawa, S. Oguri, N. Okada, A. Okamoto, T. Okamura, C. Otani, G. Patanchon, G. Pisano, G. Rebeiz, M. Remazeilles, P. L. Richards, S. Sakai, Y. Sakurai, Y. Sato, N. Sato, M. Sawada, Y. Segawa, Y. Sekimoto, U. Seljak, B. D. Sherwin, T. Shimizu, K. Shinozaki, R. Stompor, H. Sugai, H. Sugita, J. Suzuki, O. Tajima, S. Takada, R. Takaku, S. Takakura, S. Takatori, D. Tanabe, E. Taylor, K. L. Thompson, B. Thorne, T. Tomaru, T. Tomida, N. Tomita, M. Tristram, C. Tucker, P. Turin, M. Tsujimoto, S. Uozumi, S. Utsunomiya, Y. Uzawa, F. Vansyngel, I. K. Wehus, B. Westbrook, M. Willer, N. Whitehorn, Y. Yamada, R. Yamamoto, N. Yamasaki, T. Yamashita, M. Yoshida, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Service des Basses Températures (SBT ), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire des Cryoréfrigérateurs et Cryogénie Spatiale (LCCS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Cosmic microwave background, FOS: Physical sciences, cosmic background radiation: polarization, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Radio spectrum, law.invention, Antenna array, Telescope, Optics, bolometer, Settore FIS/05 - Astronomia e Astrofisica, law, Polarization, 0103 physical sciences, B-mode, Inflation, Satellite, General Materials Science, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, activity report, detector: design, Physics, 010308 nuclear & particles physics, business.industry, Gravitational wave, Detector, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, Condensed Matter Physics, Astrophysics - Astrophysics of Galaxies, Atomic and Molecular Physics, and Optics, cryogenics, Astrophysics of Galaxies (astro-ph.GA), electronics: readout, interference: quantum, Transition edge sensor, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], business, cosmic background radiation: anisotropy
Abstract: 著者人数: 153名（所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 堂谷, 忠靖; 羽澄, 昌史; 今田, 大皓; 満田, 和久; 坂井, 真一郎; Tomida, T.; 辻本, 匡弘; Yamamoto, R.; 山崎, 典子）, Accepted: 2018-04-30, 資料番号: SA1180210000
Published: 2018
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8. On the Attempt to be a Sensitive Observer in Appalachia

Author: ALAN J. GRAIN
Published: 2017
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9. Concept Study of Optical Configurations for High-Frequency Telescope for LiteBIRD

Author: D. W. Curtis, M. Nakajima, T. Funaki, R. Takaku, Yoshinori Uzawa, Carlo Baccigalupi, Johannes Hubmayr, U. Fuskeland, Theodore Kisner, S. Beckman, Anna Mangilli, Erminia Calabrese, Neil Goeckner-Wald, Uroš Seljak, M. Nagai, N. Katayama, Jonathan Aumont, Carole Tucker, Suguru Takada, Shin Utsunomiya, Kazunori Kohri, R. Nagata, Kam Arnold, M. Bucher, A. Dominjon, N. Sato, M. A. Dobbs, Shin-ichiro Sakai, Darcy Barron, Gene C. Hilton, H. K. Eriksen, Yasuhiro Yamada, Oliver Jeong, Aritoki Suzuki, Atsushi Okamoto, Tadayasu Dotani, T. Tomida, D. Meilhan, L. Duband, S. A. Kernasovskiy, S. Takakura, S. Takatori, R. Stompor, A. Ducout, B. Thorne, Eiichiro Komatsu, Hajime Sugai, Keisuke Shinozaki, N. Tomita, J. Fischer, Yuji Chinone, C. L. Kuo, L. Montier, Akito Kusaka, Toshiaki Iida, Aaron Lee, Yuki Inoue, Makoto Sawada, Ingunn Kathrine Wehus, L. Hayes, Mitsuhiro Yoshida, K. L. Thompson, H. Nishino, Mathieu Remazeilles, Tomotake Matsumura, Shugo Oguri, K. Komatsu, Reijo Keskitalo, T. Yamashita, T. Kawasaki, Takahiro Okamura, Masashi Hazumi, Osamu Tajima, Takayuki Tomaru, G. Patanchon, M. Tristram, Giampaolo Pisano, Hirokazu Ishino, Masato Naruse, Jun-ichi Suzuki, H. M. Cho, Paul Turin, Toshiya Namikawa, Yuki Sakurai, Y. Kida, Blake D. Sherwin, J. Grain, Chiko Otani, Noriko Y. Yamasaki, N. W. Halverson, Shuji Matsuura, S. Uozumi, Takashi Noguchi, T. Nagasaki, H. Imada, M. Willer, Y. Sato, M. Inoue, J. M. Duval, Bruno Maffei, Toshifumi Shimizu, Yuto Minami, F. Boulanger, Tucker Elleflot, Charles A. Hill, Benjamin Westbrook, Shogo Nakamura, Peter A. R. Ade, Kaori Hattori, Paul L. Richards, Alex Lazarian, Y. Segawa, Julian Borrill, Ryo Yamamoto, Kiyotomo Ichiki, M. Maki, Satoru Mima, D. Tanabe, Jo Dunkley, Kazuhisa Mitsuda, Soumen Basak, Gabriel M. Rebeiz, Tom Nitta, T. de Haan, T. Hamada, H. Kanai, K. Ganga, Hideo Ogawa, D. Kaneko, A. Cukierman, Nathan Whitehorn, Eric V. Linder, Masaya Hasegawa, Josquin Errard, Kimihiro Kimura, Hiroyuki Sugita, David Alonso, T. Hasebe, Kent D. Irwin, E. Taylor, Norio Okada, N. Hidehira, Shingo Kashima, A. Kibayashi, Noah Kurinsky, T. Fujino, Y. Akiba, Makoto Hattori, Dale Li, Masahiro Tsujimoto, Yutaro Sekimoto, F. Vansyngel, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Electronique et des Technologies de l'Information (CEA-LETI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Service des Basses Températures (SBT ), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Laboratoire des Cryoréfrigérateurs et Cryogénie Spatiale (LCCS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and Université Grenoble Alpes (UGA)-Direction de Recherche Technologique (CEA) (DRT (CEA))
Subjects: Cosmic microwave background radiation, Inflation, Satellite, Telescope, Silicon, Cosmic microwave background, chemistry.chemical_element, engineering.material, 01 natural sciences, law.invention, 010309 optics, Optics, Settore FIS/05 - Astronomia e Astrofisica, Coating, law, 0103 physical sciences, General Materials Science, Sensitivity (control systems), [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Physics, business.industry, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Lens (optics), chemistry, engineering, Reflection (physics), business, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: 著者人数: 152名（所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 長谷部, 孝; 堂谷, 忠靖; 羽澄, 昌史; 今田, 大皓; 満田, 和久; 坂井, 真一郎; 関本, 裕太郎; Tomida, T.; 辻本, 匡弘; Yamamoto, R.; 山崎, 典子), Accepted: 2018-04-07, 資料番号: SA1180209000
Published: 2017
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10. Loop quantum gravity and observations

Author: Aurelien Barrau, J. Grain, Vernay, Emmanuelle, A. Ashtekar, J. Pullin, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut d'astrophysique spatiale (IAS), and Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Astroparticle physics, Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), [PHYS.GRQC] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Cosmological model, Loop quantum gravity, Decoupling (cosmology), General Relativity and Quantum Cosmology, Cosmology, Theoretical physics, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Quantum gravity, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Quantum gravity has long been thought to be completely decoupled from experiments or observations. Although it is true that smoking guns are still missing, there are now serious hopes that quantum gravity phenomena might be tested. We review here some possible ways to observe loop quantum gravity effects either in the framework of cosmology or in astroparticle physics., Comment: draft chapter for a volume edited by A. Ashtekar and J. Pullin, to be published in the World Scientific series "100 Years of General Relativity" Minor corrections and new references added
Published: 2017

11. An original constraint on the Hubble constant:h> 0.74

Author: Aurélien Barrau, A. Gorecki, and J. Grain
Subjects: Physics, High energy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, CMB cold spot, Lower limit, Confidence interval, Constraint (information theory), High Energy Physics - Phenomenology, symbols.namesake, Space and Planetary Science, Cosmic infrared background, 0103 physical sciences, symbols, 010306 general physics, Absorption (electromagnetic radiation), 010303 astronomy & astrophysics, Hubble's law
Abstract: The Hubble parameter H0 still not very well measured. Although the Hubble Key Project, Chandra and WMAP gave good estimates, the uncertainties remain quite large. In this brief report, we suggest an original and independent method to derive a lower limit on H0 using the absorption of very high energy gamma-rays by the cosmic infrared background. With conservative hypothesis, we obtain H0>74 km/s/Mpc at the 68% confidence level, which favors the upper end of the intervals allowed by dedicated experiments., Comment: 7 pages, 3 figures. Version accepted by MNRAS, minor changes, results unchanged
Published: 2008
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12. Kerr-Gauss-Bonnet black holes: Exact analytical solution

Author: Joseph Fourier, Nikolay Popov, J. Grain, Aurélien Barrau, M. Startseva, Stanislav Alexeyev, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Gravity (chemistry), 010308 nuclear & particles physics, General Physics and Astronomy, Order (ring theory), Curvature, 01 natural sciences, String (physics), Action (physics), High Energy Physics::Theory, General Relativity and Quantum Cosmology, Theoretical physics, symbols.namesake, Gauss–Bonnet theorem, 0103 physical sciences, Metric (mathematics), [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], symbols, Mathematics::Differential Geometry, Einstein, 010306 general physics
Abstract: accepted by JETP; Gauss-Bonnet gravity provides one of the most promising frameworks to study curvature corrections to the Einstein action in supersymmetric string theories, while avoiding ghosts and keeping second order field equations. Although Schwarzschild-type solutions for Gauss-Bonnet black holes have been known for long, the Kerr-Gauss-Bonnet metric was missing. In this paper, a five dimensional Gauss-Bonnet solution is analytically derived for spinning black holes and the related thermodynamical properties are briefly outlined.
Published: 2008
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13. The perturbed universe in the deformed algebra approach of Loop Quantum Cosmology

Author: J. Grain, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11), Institut d'astrophysique spatiale ( IAS ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), and Université Paris-Sud - Paris 11 ( UP11 )
Subjects: algebra: deformation, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], Cosmic microwave background, 98.80.Jk, 01 natural sciences, General Relativity and Quantum Cosmology, correction: quantum, 04.60.Pp, Mathematical Physics, media_common, Physics, Quantum cosmology, power spectrum: anisotropy, B-mode, space-time, bounce: quantum, power spectrum: angular dependence, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], 98.80.Qc, history, 04.60.Ds, Astrophysics - Cosmology and Nongalactic Astrophysics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), satellite: Planck, Canonical quantization, perturbation, media_common.quotation_subject, FOS: Physical sciences, 04.60.Bc, Astrophysics::Cosmology and Extragalactic Astrophysics, General Relativity and Quantum Cosmology (gr-qc), Loop quantum gravity, quantum cosmology: loop space, [ PHYS.GRQC ] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], power spectrum: primordial, power spectrum: scalar, 0103 physical sciences, 010306 general physics, Loop quantum cosmology, Spacetime, 010308 nuclear & particles physics, background, Astronomy and Astrophysics, Universe, boundary condition, Algebra, Space and Planetary Science, quantum gravity, Quantum gravity, quantization, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], quantum gravity: loop space, cosmic background radiation: anisotropy
Abstract: Loop quantum cosmology is a tentative approach to model the universe down to the Planck era where quantum gravity settings are needed. The quantization of the universe as a dynamical space-time is inspired by Loop Quantum Gravity ideas. In addition, loop quantum cosmology could bridge contact with astronomical observations, and thus potentially investigate quantum cosmology modellings in the light of observations. To do so however, modelling both the background evolution and its perturbations is needed. The latter describe cosmic inhomogeneities that are the main cosmological observables. In this context, we present the so-called deformed algebra approach implementing the quantum corrections to the perturbed universe at an effective level by taking great care of gauge issues. We particularly highlight that in this framework, the algebra of hypersurface deformation receives quantum corrections, and we discuss their meaning. The primordial power spectra of scalar and tensor inhomogeneities are then presented, assuming initial conditions are set in the contracting phase preceding the quantum bounce and the well-known expanding phase of the cosmic history. These spectra are subsequently propagated to angular power spectra of the anisotropies of the cosmic microwave background. It is then shown that regardless of the choice for the initial conditions inside the effective approach for the background evolution (except that they are set in the contracting phase), the predicted angular power spectra of the polarized B-modes exceed the upper bound currently set by observations. The exclusion of this specific version of loop quantum cosmology establishes the falsifiability of the approach, though one shall not conclude here that either loop quantum cosmology or loop quantum gravity is excluded., Comment: Invited paper for a special issue of IJMPD on Loop Quantum Cosmology
Published: 2016
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14. Observational Exclusion of a Consistent Quantum Cosmology Scenario

Author: J. Grain, Boris Bolliet, Aurélien Barrau, Susanne Schander, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Inflation (cosmology), High Energy Physics - Theory, Quantum geometry, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, Hořava–Lifshitz gravity, Immirzi parameter, FOS: Physical sciences, Loop quantum gravity, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, Theoretical physics, Classical mechanics, High Energy Physics - Theory (hep-th), Quantum cosmology, 0103 physical sciences, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Quantum gravity, 010306 general physics, Loop quantum cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: It is often argued that inflation erases all the information about what took place before it started. Quantum gravity, relevant in the Planck era, seems therefore mostly impossible to probe with cosmological observations. In general, only very ad hoc scenarios or hyper fine-tuned initial conditions can lead to observationally testable theories. Here we consider a well-defined and well motivated candidate quantum cosmology model that predicts inflation. Using the most recent observational constraints on the cosmic microwave background B modes, we show that the model is excluded for all its parameter space, without any tuning. Some important consequences are drawn for the deformed algebra approach to loop quantum cosmology. We emphasize that neither loop quantum cosmology in general nor loop quantum gravity are disfavored by this study but their falsifiability is established., 5 pages, 2 figure
Published: 2015
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15. Detecting the tensor-to-scalar ratio with the pure pseudospectrum reconstruction of $B$-mode

Author: J. Grain, J. Peloton, A. Ferté, Radek Stompor, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Physics, Pseudospectrum, Nuclear and High Energy Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, Gravitational wave, business.industry, Cosmic microwave background, Cosmic background radiation, Estimator, Spectral density, FOS: Physical sciences, 01 natural sciences, Cosmology, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Optics, Amplitude, 0103 physical sciences, Statistical physics, business, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: In this work we employ the pure-pseudo formalism devised to minimise the effects of the leakage on the variance of power spectrum estimates and discuss the limits on the tensor-to-scalar ratio, $r$, that could be realistically set by current and forthcoming measurements of the $B$-mode angular power spectrum. We compare those with the results obtained using other approaches: na\"{i}ve mode-counting, minimum-variance quadratic estimators, and re-visit the question of optimizing the sky coverage of small-scale, suborbital experiments in order to maximize the statistical significance of the detection of $r$. We show that the optimized sky coverage is largely insensitive to the adopted approach at least for reasonably compact sky patches. We find, however, that the mode-counting overestimates the detection significance by a factor $\sim1.17$ as compared to the lossless maximum variance approach and by a factor $\sim1.25$ as compared to the lossy pure pseudo-spectrum estimator. In a second time, we consider more realistic experimental configurations. With a pure pseudospectrum reconstruction of $B$-modes and considering only statistical uncertainties, we find that a detection of $r\sim0.11$, $r\sim0.0051$ and $r\sim0.0026$ at 99$\%$ of confidence level is within the reach of current sub-orbital experiments, future arrays of ground-based telescopes and a satellite mission, respectively. This means that an array of telescopes could be sufficient to discriminate between large- and small-field models of inflation, even if the $E$-to-$B$ leakage is consistently included but accounted for in the analysis. However, a satellite mission will be required to distinguish between different small-field models depending on the number of e-folds., Comment: 20 pages, 10 figures. Minor changes to match the published version. Published in Physical Review D
Published: 2015
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16. Comparison of primordial tensor power spectra from the deformed algebra and dressed metric approaches in loop quantum cosmology

Author: Boris Bolliet, Clément Stahl, Aurélien Barrau, J. Grain, Linda Linsefors, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Inflation (cosmology), Physics, High Energy Physics - Theory, Nuclear and High Energy Physics, Quantum geometry, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Hořava–Lifshitz gravity, [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], FOS: Physical sciences, Loop quantum gravity, General Relativity and Quantum Cosmology (gr-qc), 16. Peace & justice, General Relativity and Quantum Cosmology, Algebra, Open quantum system, High Energy Physics - Theory (hep-th), Quantum cosmology, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Big Bounce, Loop quantum cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Loop quantum cosmology tries to capture the main ideas of loop quantum gravity and to apply them to the Universe as a whole. Two main approaches within this framework have been considered to date for the study of cosmological perturbations: the dressed metric approach and the deformed algebra approach. They both have advantages and drawbacks. In this article, we accurately compare their predictions. In particular, we compute the associated primordial tensor power spectra. We show -- numerically and analytically -- that the large scale behavior is similar for both approaches and compatible with the usual prediction of general relativity. The small scale behavior is, the other way round, drastically different. Most importantly, we show that in a range of wavenumbers explicitly calculated, both approaches do agree on predictions that, in addition, differ from standard general relativity and do not depend on unknown parameters. These features of the power spectrum at intermediate scales might constitute a universal loop quantum cosmology prediction that can hopefully lead to observational tests and constraints. We also present a complete analytical study of the background evolution for the bouncing universe that can be used for other purposes., 15 pages, 7 figures
Published: 2015
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17. Detecting chiral gravity with the pure pseudospectrum reconstruction of the cosmic microwave background polarized anisotropies

Author: J. Grain and Agnès Ferté
Subjects: Pseudospectrum, Physics, Nuclear and High Energy Physics, Particle physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, Cosmic microwave background, Immirzi parameter, FOS: Physical sciences, Parity (physics), Upper and lower bounds, Asymmetry, Gravitation, Quantum mechanics, Observational cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics, media_common
Abstract: We consider the possible detection of parity violation at the linear level in gravity using polarized anisotropies of the cosmic microwave background. Since such a parity violation would lead to non-zero TB and EB correlations, this makes those odd-parity angular power spectra a potential probe of parity violation in the gravitational sector. These spectra are modeled incorporating the impact of lensing and we explore their possible detection in the context of small-scale (balloon-borne or ground-based) experiments and a future satellite mission dedicated to B-mode detection. We assess the statistical uncertainties on their reconstruction using mode-counting and a (more realistic) pure pseudospectrum estimator approach. Those uncertainties are then translated into constraints on the level of parity asymmetry. We found that detecting chiral gravity is impossible for ongoing small-scale experiments. However, for a satellite-like mission, a parity asymmetry of at least 50% could be detected at 68% of confidence level, and a parity asymmetry of 100% is measurable with at least a confidence level of 95%. We also assess the impact of a possible miscalibration of the orientation of the polarized detectors, leading to spurious TB and EB cross-correlations. We show that in the context of pseudospectrum estimation of the angular power spectra, self-calibration of this angle could significantly reduce the statistical significance of the measured level of parity asymmetry (by e.g. a factor ~2.4 for a miscalibration angle of 1 degree). For chiral gravity and assuming a satellite mission dedicated to primordial B-mode, a non detection of the TB and EB correlation would translate into an upper bound on parity violation of 39% at 95% confidence level for a tensor-to-scalar ratio of 0.2, excluding values of the (imaginary) Barbero-Immirzi parameter comprised between 0.2 and 4.9 at 95% CL., Comment: 21 pages, 6 figures, accepted for publication in Phys. Rev. D (typos and references corrected)
Published: 2014
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18. Efficiency of pseudospectrum methods for estimation of Cosmic Microwave Background B-mode power spectrum

Author: Matthieu Tristram, J. Grain, Agnes Ferte, Radek Stompor, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), PLANCK, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), APC - Gravitation (APC-Gravitation), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Pseudospectrum, Nuclear and High Energy Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, business.industry, Gravitational wave, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Cosmic microwave background, Spectral density, FOS: Physical sciences, Polarization (waves), Residual, 01 natural sciences, Cosmology, 3. Good health, Computational physics, Astron, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Optics, 0103 physical sciences, business, 010303 astronomy & astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Estimation of the B-mode angular power spectrum of polarized anisotropies of the cosmic microwave background (CMB) is a key step towards a full exploitation of the scientific potential of this probe. In the context of pseudo-spectrum methods the major challenge is related to a contamination of the B-mode spectrum estimate with residual power of much larger E-mode. This so-called E-to-B leakage is unavoidably present whenever an incomplete sky map is only available, as is the case for any realistic observation. The leakage has to be then minimized or removed and ideally in such a way that neither a bias nor extra variance is introduced. In this paper, we compare from these two perspectives three different methods proposed recently in this context Refs. Smith 2006, Zhao & Baskaran 2010, Kim & Naselsky 2010, which we first introduce within a common algebraic framework of the so-called chi-fields and then study their performance on two different experimental configurations - one corresponding to a small-scale experiment covering 1% of the sky motivated by current ground-based or balloon-borne experiments and another - to a nearly full-sky experiment, e.g., a possible CMB B-mode satellite mission. We find that though all these methods allow to reduce significantly the level of the E-to-B leakage, it is the method of Smith 2006, which at the same time ensures the smallest error bars in all experimental configurations studied here, owing to the fact that it permits straightforwardly for an optimization of the sky apodization of the polarization maps used for the estimation. For a satellite-like experiment, this method enables a detection of B-mode power spectrum at large angular scales but only after appropriate binning. The method of Zhao & Baskaran 2010 is a close runner-up in the case of a nearly full sky coverage., 23 pages, 10 figures
Published: 2013
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19. Etude ultrastructurale de Troglodytella gorillae, cilié de l'intestin des gorilles: Considérations sur la systématique des ciliés entodiniomorphes

Author: A, Bonhomme, J, Grain, and J Y, Collet
Abstract: This ultrastructural study of the entodiniomorphid Troglodytella gorillae provides information on the constitution of the cortex, which is composed of the plasma membrane, a thick epiplasm, microtubules, and a microfibrillar ecto-endoplasmic limit (cortex type I). This observation allows us to group the family Troglodytellidae with the families Cycloposthiidae and Ophryoscolecidae. These 3 families should be separated from the families Tripalmariidae and Spirodiniidae which possess a more complex cortex, with longitudinal dense tracts inserted between the microtubular layer and the microfibrillar ecto-endoplasmic limit (type II). Terminology is discussed.
Published: 2012

20. Probing loop quantum gravity with evaporating black holes

Author: J. Diaz-Polo, J. Grain, Xiangyu Cao, T. Cailleteau, A. Barrau, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), École polytechnique (X), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Sud - Paris 11 (UP11)
Subjects: High Energy Physics - Theory, Cosmology and Nongalactic Astrophysics (astro-ph.CO), General Physics and Astronomy, Spin foam, FOS: Physical sciences, Loop quantum gravity, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, Micro black hole, High Energy Physics - Phenomenology (hep-ph), Computer Science::Systems and Control, 0103 physical sciences, 010306 general physics, Black hole thermodynamics, Physics, 010308 nuclear & particles physics, [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], Immirzi parameter, Black hole, High Energy Physics - Phenomenology, Classical mechanics, High Energy Physics - Theory (hep-th), [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Semiclassical gravity, Astrophysics - Cosmology and Nongalactic Astrophysics, Hawking radiation
Abstract: This letter aims at showing that the observation of evaporating black holes should allow distinguishing between the usual Hawking behavior and Loop Quantum Gravity (LQG) expectations. We present a full Monte-Carlo simulation of the evaporation in LQG and statistical tests that discriminate between competing models. We conclude that contrarily to what was commonly thought, the discreteness of the area in LQG leads to characteristic features that qualify evaporating black holes as objects that could reveal quantum gravity footprints., Comment: 5 pages, 3 figures. Version accpeted by Phys. Rev. Lett
Published: 2011
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21. Prise en charge scolaire des enfants en insuffisance rénale terminale

Author: M. Foulard, C. Spodek, J. Grain, and A. Bensman
Subjects: business.industry, Pediatrics, Perinatology and Child Health, Medicine, business
Published: 2014
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22. Fully loop-quantum-cosmology-corrected propagation of gravitational waves during slow-roll inflation

Author: T. Cailleteau, J. Grain, A. Barrau, A. Gorecki, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Sud - Paris 11 (UP11)
Subjects: High Energy Physics - Theory, Nuclear and High Energy Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 04.60.Pp, 04.60.Bc, 98.80.Cq, 98.80.Qc, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology (hep-ph), Quantum cosmology, 0103 physical sciences, Quantum field theory, 010306 general physics, Loop quantum cosmology, Physics, Inflation (cosmology), Slow roll, 010308 nuclear & particles physics, Gravitational wave, Observable, High Energy Physics - Phenomenology, Classical mechanics, High Energy Physics - Theory (hep-th), [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Quantum gravity, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The cosmological primordial power spectrum is known to be one of the most promising observable to probe quantum gravity effects. In this article, we investigate how the tensor power spectrum is modified by Loop Quantum Gravity corrections. The two most important quantum terms, holonomy and inverse volume, are explicitly taken into account in a unified framework. The equation of propagation of gravitational waves is derived and solved for one set of parameters., Comment: 9 pages, no figure, minor corrections
Published: 2010
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23. Loop Quantum Cosmology corrections on gravity waves produced during primordial inflation

Author: J. Grain, Jean-Michel Alimi, and André Fuözfa
Subjects: Inflation (cosmology), Physics, High Energy Physics - Theory, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Initial singularity, media_common.quotation_subject, Cosmic microwave background, FOS: Physical sciences, Loop quantum gravity, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, Universe, General Relativity and Quantum Cosmology, Theoretical physics, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), Quantum cosmology, Quantum gravity, media_common, Loop quantum cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Loop Quantum Gravity (L.Q.G.) is one of the two most promising tentative theory for a quantum description of gravity. When applied to the entire universe, the so-called Loop Quantum Cosmology (L.Q.C.) framework offers microscopical models of the very early stages of the cosmological history, potentially solving the initial singularity problem via bouncing solutions or setting the universe in the appropriate initial conditions for inflation to start, via a phase of super-inflation. More interestingly, L.Q.C. could leave a footprint on cosmological observables such as the Cosmic Microwave Background (CMB) anisotropies. Focusing on the modified dispersion relation when holonomy and inverse-volume corrections arising from the L.Q.C. framework are considered, it is shown that primordial gravity waves generated during inflation are affected by quantum corrections. Depending on the type of corrections, the primordial tensor power spectrum is either suppressed or boosted at large length scales, and strongly departs from the power-law behavior expected in the standard scenario., to be published in the AIP Proceedings of the 'Invisible Universe International Conference', UNESCO-Paris, June 29-July 3, 2009; 9 pp., 4 Figs
Published: 2009

24. Polarized CMB power spectrum estimation using the pure pseudo-cross-spectrum approach

Author: Radek Stompor, J. Grain, Matthieu Tristram, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), APC - Gravitation (APC-Gravitation), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI)
Subjects: Physics, Nuclear and High Energy Physics, [STAT.AP]Statistics [stat]/Applications [stat.AP], Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], media_common.quotation_subject, Cosmic microwave background, Spectral density, Estimator, FOS: Physical sciences, Approx, 01 natural sciences, Window function, Computational physics, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Matrix (mathematics), Theoretical physics, Sky, 0103 physical sciences, Pixelization, 010303 astronomy & astrophysics, media_common, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We extend the pure pseudo-power-spectrum formalism proposed recently in the context of the Cosmic Microwave Background polarized power spectra estimation by Smith (2006) to incorporate cross-spectra computed for multiple maps of the same sky area. We present an implementation of such a technique, paying particular attention to a calculation of the relevant window functions and mixing (mode-coupling) matrices. We discuss the relevance and treatment of the residual $E/B$ leakage for a number of considered sky apodizations as well as compromises and assumptions involved in an optimization of the resulting power spectrum uncertainty. In particular, we investigate the importance of a pixelization scheme, patch geometry, and sky signal priors used in apodization optimization procedures. In addition, we also present results derived for more realistic sky scans as motivated by the proposed balloon borne experiment EBEX. We conclude that the presented formalism thanks to its speed and efficiency can provide an interesting alternative to the CMB polarized power spectra estimators based on the optimal methods at least on angular scales smaller than ~10 degrees. In this regime, we find that it is capable of suppressing the total variance of the estimated $B$-mode spectrum to within a factor of ~2 of the variance due to only the sampling and noise uncertainty of the B-modes alone, as derived from the Fisher matrix approach., 31 pages, 24 figures, typos corrected on Eq. 32, Appendix C clarified, published in Physical Review D
Published: 2009
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25. Cosmological footprints of loop quantum gravity

Author: J. Grain, A. Barrau, APC - Gravitation (APC-Gravitation), AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut des Hautes Etudes Scientifiques (IHES), IHES, Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Institut des Hautes Études Scientifiques (IHES)
Subjects: High Energy Physics - Theory, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Hořava–Lifshitz gravity, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], FOS: Physical sciences, General Physics and Astronomy, Spin foam, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, Loop quantum gravity, Euclidean quantum gravity, 01 natural sciences, General Relativity and Quantum Cosmology, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Theoretical physics, High Energy Physics - Phenomenology (hep-ph), [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], 0103 physical sciences, 010306 general physics, Loop quantum cosmology, Physics, Quantum Physics, Quantum geometry, 010308 nuclear & particles physics, [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], High Energy Physics - Phenomenology, Classical mechanics, High Energy Physics - Theory (hep-th), [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Quantum gravity, Semiclassical gravity, Quantum Physics (quant-ph), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The primordial spectrum of cosmological tensor perturbations is considered as a possible probe of quantum gravity effects. Together with string theory, loop quantum gravity is one of the most promising frameworks to study quantum effects in the early universe. We show that the associated holonomy correction should modify the potential seen by gravitational waves during the inflationary amplification. The resulting power spectrum should exhibit a characteristic tilt. This opens a new window for cosmological tests of quantum gravity., Comment: Accepted by Phys. Rev. Lett., 7 pages, 2 figures
Published: 2008
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26. Phenomenology of black hole evaporation with a cosmological constant

Author: J. Grain, J. Labbe, A. Barrau, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and bibliotheque, LPSC
Subjects: High Energy Physics - Theory, Computation, FOS: Physical sciences, Cosmic ray, General Relativity and Quantum Cosmology (gr-qc), Cosmological constant, 030204 cardiovascular system & hematology, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, High Energy Physics - Experiment, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High Energy Physics - Experiment (hep-ex), 03 medical and health sciences, Theoretical physics, High Energy Physics - Phenomenology (hep-ph), 0302 clinical medicine, 0101 mathematics, Physics, Large Hadron Collider, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Spacetime, Astrophysics (astro-ph), 010102 general mathematics, [PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Black hole, High Energy Physics - Phenomenology, High Energy Physics - Theory (hep-th), [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Phenomenology (particle physics)
Abstract: In this brief note, we investigate some possible experimental consequences of the de-Sitter or Anti-de-Sitter background spacetime structure for d-dimensional evaporating black holes. Possible observational signatures in Large Hadron Collider (LHC) events are considered in the framework of the Arkani-Hamed-Dimopoulos-Dvali (ADD) braneworld model. Lower bounds on the value of the bulk cosmological constant required to produce visible effects are derived thanks to a dynamical Monte-Carlo simulation. This preliminary study has to be refined by the accurate computation of the greybody factors. It opens a new way to investigate the structure of non-asymptotically flat higher-dimensional spacetimes., Proceedings of the HEP2005 conference. Related greybody factors for evaporating black holes available at : http://lpsc.in2p3.fr/ams/greybody/
Published: 2007
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27. Quantum Bound States Around Black Holes

Author: J. Grain, A. Barrau, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: High Energy Physics - Theory, Physics and Astronomy (miscellaneous), General relativity, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, Theoretical physics, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Bound state, 010306 general physics, Engineering (miscellaneous), Quantum, Physics, Quantum Physics, [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], 010308 nuclear & particles physics, Astrophysics (astro-ph), Scalar (physics), High Energy Physics - Phenomenology, Hawking, High Energy Physics - Theory (hep-th), Quantum Physics (quant-ph)
Abstract: Quantum mechanics around black holes has shown to be one of the most fascinating fields of theoretical physics. It involves both general relativity and particle physics, opening new eras to establish the principles of unified theories. In this article, we show that quantum bound states with no classical equivalent -- as it can easily be seen at the dominant monopolar order -- should be formed around black holes for massive scalar particles. We qualitatively investigate some important physical consequences, in particular for the Hawking evaporation mechanism and the associated greybody factors., 5 pages, 6 figures
Published: 2007
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28. Semiclassical scalar propagators in curved backgrounds: formalism and ambiguities

Author: J. Grain, A. Barrau, APC - Gravitation (APC-Gravitation), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
Subjects: High Energy Physics - Theory, Nuclear and High Energy Physics, Quantum dynamics, FOS: Physical sciences, Semiclassical physics, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, Open quantum system, Theoretical physics, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Quantum operation, Hamilton–Jacobi–Einstein equation, 010306 general physics, Physics, Quantum Physics, Quantum field theory in curved spacetime, 010308 nuclear & particles physics, [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], Astrophysics (astro-ph), 04.62.+v, 11.15.Kc, High Energy Physics - Phenomenology, Classical mechanics, High Energy Physics - Theory (hep-th), Quantum process, Semiclassical gravity, Quantum Physics (quant-ph)
Abstract: The phenomenology of quantum systems in curved space-times is among the most fascinating fields of physics, allowing --often at the gedankenexperiment level-- constraints on tentative theories of quantum gravity. Determining the dynamics of fields in curved backgrounds remains however a complicated task because of the highly intricate partial differential equations involved, especially when the space metric exhibits no symmetry. In this article, we provide --in a pedagogical way-- a general formalism to determine this dynamics at the semiclassical order. To this purpose, a generic expression for the semiclassical propagator is computed and the equation of motion for the probability four-current is derived. Those results underline a direct analogy between the computation of the propagator in general relativistic quantum mechanics and the computation of the propagator for stationary systems in non-relativistic quantum mechanics. A possible application of this formalism to curvature-induced quantum interferences is also discussed., Comment: New materials on gravitationally-induced quantum interferences has been added
Published: 2007
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29. Gravitino production by primordial black hole evaporation and constraints on the inhomogeneity of the early universe

Author: A. Barrau, M. Yu. Khlopov, J. Grain, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: High Energy Physics - Theory, Physics and Astronomy (miscellaneous), media_common.quotation_subject, Evaporation, FOS: Physical sciences, Primordial black hole, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, 04.70.Dy, 98.80.Cq, 98.80.Es, 04.65.+e, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High Energy Physics::Theory, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, 010303 astronomy & astrophysics, media_common, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Supergravity, Astrophysics (astro-ph), High Energy Physics::Phenomenology, Gauge (firearms), Supersymmetry breaking, Universe, High Energy Physics - Phenomenology, High Energy Physics - Theory (hep-th), Gravitino
Abstract: In supergravity models, the evaporation of light Primordial Black Holes (PBHs) should be a source of gravitinos. By considering this process, new stringent limits are derived on the abundance of small black holes with initial masses less than 10^9 g. In minimal supergravity, the subsequent decay of evaporated gravitinos into cascades of non-equilibrium particles leads to the formation of elements whose abundance is constrained by observations. In gauge mediated supersymmetry breaking models, their density is required not to overclose the Universe. As a result, cosmological models with substantial inhomogeneities on small scales are excluded., Published version. Minor changes, references added
Published: 2006
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30. Black hole solutions in the N > 4 gravity models with higher order curvature corrections and possibilities for experimental search of such objects

Author: Aurélien Barrau, Nikolay Popov, J. Grain, Stanislav Alexeyev, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, History, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Gauss, Invariant (physics), String theory, Curvature, 01 natural sciences, Computer Science Applications, Education, Black hole, Theoretical physics, symbols.namesake, General Relativity and Quantum Cosmology, High Energy Physics::Theory, Classical mechanics, 0103 physical sciences, symbols, Black brane, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Mathematics::Differential Geometry, Brane, Einstein, 010306 general physics
Abstract: The Gauss - Bonnet invariant is one of the most promising candidates for a quadratic curvature correction to the Einstein action in expansions of supersymmetric string theory. We study these Gauss - Bonnet black holes (and their properties) which could be formed at future colliders if the Planck scale is of order a TeV, as predicted by some modern brane world models.
Published: 2005
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31. Temperature and polarization angular power spectra of Galactic dust radiation at 353 GHz as measured by Archeops

Author: N. Ponthieu, J. F. Macías-Pérez, M. Tristram, P. Ade, A. Amblard, R. Ansari, J. Aumont, É. Aubourg, A. Benoît, J.-Ph. Bernard, A. Blanchard, J. J. Bock, F. R. Bouchet, A. Bourrachot, P. Camus, J.-F. Cardoso, F. Couchot, P. de Bernardis, J. Delabrouille, F.-X. Désert, M. Douspis, L. Dumoulin, Ph. Filliatre, P. Fosalba, M. Giard, Y. Giraud-Héraud, R. Gispert, J. Grain, L. Guglielmi, J.-Ch. Hamilton, S. Hanany, S. Henrot-Versillé, J. Kaplan, G. Lagache, A. E. Lange, K. Madet, B. Maffei, S. Masi, F. Mayet, F. Nati, G. Patanchon, O. Perdereau, S. Plaszczynski, M. Piat, S. Prunet, J.-L. Puget, C. Renault, C. Rosset, D. Santos, D. Vibert, D. Yvon, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre de Recherches sur les Très Basses Températures (CRTBT), Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Université Joseph Fourier - Grenoble 1 (UJF), Centre d'étude spatiale des rayonnements (CESR), Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Grenoble (LAOG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), ARCHEOPS, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Ponthieu, N, Mac??as-P??rez, J, Tristram, M, Ade, P, Amblard, A, Ansari, R, Aumont, J, Aubourg, ?, Beno??t, A, Bernard, J, Blanchard, A, Bock, J, Bouchet, F, Bourrachot, A, Camus, P, Cardoso, J, Couchot, F, de Bernardis, P, Delabrouille, J, D??sert, F, Douspis, M, Dumoulin, L, Filliatre, P, Fosalba, P, Giard, M, Giraud-H??raud, Y, Gispert, R, Grain, J, Guglielmi, L, Hamilton, J, Hanany, S, Henrot-Versill??, S, Kaplan, J, Lagache, G, Lange, A, Madet, K, Maffei, B, Masi, S, Mayet, F, Nati, F, Patanchon, G, Perdereau, O, Plaszczynski, S, Piat, M, Prunet, S, Puget, J, Renault, C, Rosset, C, Santos, D, Vibert, D, Yvon, D, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), and Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: media_common.quotation_subject, Cosmic microwave background, Extrapolation, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Radiation, 01 natural sciences, Cosmology: observation, Spectral line, Submillimetre, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Polarization, 0103 physical sciences, Cosmic Microwave Background, 010303 astronomy & astrophysics, Observations, Astrophysics::Galaxy Astrophysics, QB, media_common, Physics, Archeops, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Astrophysics (astro-ph), Spectral density, Astronomy and Astrophysics, Dust, Extinction, Polarization (waves), Cosmology, 13. Climate action, Space and Planetary Science, Sky, Foreground, Cosmology: cosmic microwave background, ISM: dust, extinction
Abstract: We present the first measurement of temperature and polarization angular power spectra of the diffuse emission of Galactic dust at 353 GHz as seen by Archeops on 20% of the sky. The temperature angular power spectrum is compatible with that provided by the extrapolation to 353 GHz of IRAS and DIRBE maps using \cite{fds} model number 8. For Galactic latitudes $|b| \geq 5$ deg we report a 4 sigma detection of large scale ($3\leq \ell \leq 8$) temperature-polarization cross-correlation $(\ell+1)C_\ell^{TE}/2\pi = 76\pm 21 \mu\rm{K_{RJ}}^2$ and set upper limits to the $E$ and $B$ modes at $11 \mu\rm{K_{RJ}}^2$. For Galactic latitudes $|b| \geq 10$ deg, on the same angular scales, we report a 2 sigma detection of temperature-polarization cross-correlation $(\ell+1)C_\ell^{TE}/2\pi = 24\pm 13 \mu\rm{K_{RJ}}^2$. These results are then extrapolated to 100 GHz to estimate the contamination in CMB measurements by polarized diffuse Galactic dust emission. The $TE$ signal is then $1.7\pm0.5$ and $0.5\pm0.3 \mu\rm{K^2_{CMB}}$ for $|b| \geq 5$ and 10 deg. respectively. The upper limit on $E$ and $B$ becomes $0.2 \mu\rm{K^2_{CMB}} (2\sigma)$. If polarized dust emission at higher Galactic latitude cuts is similar to the one we report here, then dust polarized radiation will be a major foreground for determining the polarization power spectra of the CMB at high frequencies above 100 GHz., Comment: 11 pages, 8 figures, submitted to AA
Published: 2005
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32. Gauss-Bonnet Black Holes at the LHC : Beyond the Dimensionality of Space

Author: Aurélien Barrau, J. Grain, Stanislav Alexeyev, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)
Subjects: High Energy Physics - Theory, Nuclear and High Energy Physics, Event horizon, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Curvature, String theory, Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, High Energy Physics - Experiment, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], symbols.namesake, Theoretical physics, High Energy Physics - Experiment (hep-ex), High Energy Physics::Theory, High Energy Physics - Phenomenology (hep-ph), Gauss–Bonnet theorem, Quantum mechanics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Einstein, 010306 general physics, Physics, Coupling constant, Large Hadron Collider, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], 010308 nuclear & particles physics, Astrophysics (astro-ph), High Energy Physics - Phenomenology, High Energy Physics - Theory (hep-th), [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], symbols, Brane
Abstract: The Gauss - Bonnet invariant is one of the most promising candidates for a quadratic curvature correction to the Einstein action in expansions of supersymmetric string theory. We study the evaporation of such Schwarzschild - Gauss - Bonnet black holes which could be formed at future colliders if the Planck scale is of order a TeV, as predicted by some modern brane world models. We show that, beyond the dimensionality of space, the corresponding coupling constant could be measured by the LHC. This opens new windows for physics investigation in spite of the possible screening of microphysics due to the event horizon., Accepted by Phys. Lett. B
Published: 2003
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33. [Proposition of a new classification of the phylum of the protozoa Ciliophora Doflein, 1901]

Author: P, de Puytorac, A, Batisse, G, Deroux, A, Fleury, J, Grain, M, Laval-Peuto, and M, Tuffrau
Subjects: Animals, Ciliophora
Abstract: It is proposed to use all the presently available molecular, ultrastructural, biological and ecological data on ciliates for the new classification of this group of protists. On the basis of the cortical organization and the mode of cilia anchoring as well as the degree of conservation of the cortical pattern during the process of morphogenesis, eleven classes (Karyorelictea, Heterotrichea, Hypotrichea, Oligotrichea, Plagiopylea, Colpodea, Litostomatea, Vestibuliferea, Phyllopharyngea, Nassophorea and Oligohymenophorea) have been distinguished. These classes, in turn, were, according to the "shell theory" of Fleury and coworkers (1992), grouped into three subphyla: Tubulicorticata (presence of the cortical microtubular lattices), Filicorticata (characteristic ecto-endoplasmic microfibrillar boundary) and Epiplasmata (presence of a sub-membraneous epiplasmic layer).
Published: 1993

34. Correlation between function and structure in 'epileptic' human hippocampal tissue maintained in vitro

Author: Laszlo Urban, Peter G. Aitken, Allan H. Friedman, George G. Somjen, and Barbara J. Grain
Subjects: Adult, Male, medicine.medical_specialty, Adolescent, Gyrus dentatus, Cell Count, Hippocampal formation, Biology, In Vitro Techniques, Hippocampus, Resection, Membrane Potentials, medicine, Humans, Evoked Potentials, Neurons, Epilepsy, Sclerosis, Molecular biology, Cell loss, Negative therapeutic reaction, Surgery, Electrophysiology, Neurology, Slice method, Female, Neurology (clinical), Intractable seizures
Abstract: Summary: Intracellular and extracellular recordings were obtained from the CA1 region and gyrus dentatus of human hippocampi that had been surgically removed for treatment of intractable seizures. Pathologic diagnoses were obtained, and electrophysiologic results were correlated with degree of principal cell loss (sclerosis) in the regions studied. Extracellular field potentials were absent or smaller in amplitude, with abnormal characteristics, in sclerotic regions. In all regions, regardless of the degree of sclerosis, individual pyramidal or granule cells could be penetrated. These neurons showed apparently normal electrophysiologic characteristics and intact excitatory synaptic input. No signs of hyperexcitability were observed. ReSUMe Des enregistrements intra et extra-cellulaires ont ete obtenus a partir de la region CAI et le gyrus tentatus d'hippocampus hu-mains Apres resection chirurgicale en traitement de crises re-belles. Les diagnostics anatomo-pathologiques ont ete obtenus, et les resultats electrophysiologiques ont ete correles au degre de perte en cellules principales (sclerose) dans les regions etudiees. Les potentiels de champ extracellulaires etaient absents ou d'amplitude diminuee, avec des caracteristiques anormales au niveau des regions sclerosees. Dans toutes les regions, indepen-damment du degrt de sclerose, les cellules pyramidales ou gra-nulaires individuelles ont pu ttre penetrees. ces neurones pre-sentaient des caracteristiques tlectrophysiologiques apparem-ment normales et des afferences synaptiques excitatoires in-tactes. Il n'a pas ete constate d'hyperexcitabilite. RESUMEN Se han obtenido registros intra y extracelulares de la region CAI y del giro dentado del hipocampo humano que habia sido extraido quirlirgicamente como tratamiento de ataques incontrolables medicamente. Se estudiaron los diagnosticos patologicos y los resultados electrofisiologicos correlacionCindolos con el grado de perdida de celulas principales (esclerosis) en la regiones estudiadas. Los potenciales de campo extracelular estaban ausentes o muy reducidos en su amplitud con caracteristicas anormales en las regiones escleroticas. En todas las regiones independienternente del grado de esclerosis, fue posible penetrar las celulas piramidales y las granulosas. Estas neuronas rnostraron, aparenternente, caracteristicas electrofisiologicas normales y una inforrnacion sinaptica excitatoria intacta. No se registraron signos de hiperexcitabilidad. ZUSAMMENFASSUNG Es wurden intrazellulare und extrazellulare Ableitungen von der CAI Region und aus dem Gyrus dentatus von menschlichen Hippokampi gewonnen, die als Resultat einer chirurgischen Behandlung von unheilbaren Anfallen entfernt wurden. Die pathologischen Diagnosen wurden gestellt und die elektrophysiologischen Resultate rnit dem Ausrnaβ, des Zellnntergangs (Sklerose) in den untersuchten Gegenden korreliert. Die extrazellularen Feldpotentiale in den sklerotischen Gegenden waren entweder ganz verschwunden oder hatten kleinere Amplituden mit abnormalen Charakteristika. Unabhangig von dem Ausmaβ der Sklerose konnten in allen Gegenden individuelle Pyrarniden-oder Granulazellen abgeleitet werden. Diese Zellen zeigten offensichtlich normale elektrophysiologische Charakteristika und einen intakten exzitatorischen synaptischen Input. Zeichen einer Hyperexcitabilitat wurden nicht gesehen.
Published: 1993

35. Book review

Author: J. Grain
Subjects: Biology, Microbiology, Humanities
Published: 1996
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36. ATTITUDES TOWARD DEATH-RELATED CHOICES

Author: ERIC J. GRAIN
Subjects: General Psychology
Published: 2000
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37. Gravitino production by primordial black hole evaporation and constraints on the inhomogeneity of the early universe.

Author: M Yu Khlopov, A Barrau, and J Grain
Published: 2006

38. Book Reviews

Author: J. Grain
Subjects: Ciliate, biology, Botany, Flagellate, biology.organism_classification, Microbiology
Published: 1992
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39. Ultrastructures and evolutionary modalities of flagellar and ciliary systems in protists

Author: J. Grain, Pierre de Puytorac, and Jean-Pierre Mignot
Subjects: Axoneme, Centriole, Cilium, Ultrastructure, Cell Biology, General Medicine, Diplomonadida, Anatomy, Flagellum, Morphogenetic field, Biology, Kinetosomes, Cell biology
Abstract: As both the ultrastructure and function of flagella and cilia have been for the main part remarkably conserved during Eukaryote, evolution, the question arises as to whether the variations observed at the organite ultrastural level, or at the level of the development of a flagellar or ciliary cellular system could be considered as systematic or phylogenetic criteria. With regard to the fundamental structure, the known variations concern: 1) the kinetosome (length, position and number of cartwheels, number of triplets, and respective lengths of the microtubules); 2) the transition zone (various structural types); 3) the axoneme (number of doublets, central tubules, arms); 4) the paraxonemal formations (presence, position, structure); 5) the membrane (intramembranous particles; intramembranous particles; addition of components, mastigonemes, scales); 6) the fibres associated with the kinetosomes. Some of these variations are characteristic of taxa, and are considered as phylogenetic markers. Regarding the variations in the number of ciliary or flagellar units per cell, the following can be distinguished: cells with only one kinetosome (Ks), carrying one flagellum; cells with 2 neighbouring Ks (primary Ks = 2A), only one Ks, or the 2 Ks, bearing a flagellum; cells with numerous flagella or cilia. We consider that this configuration can result from: a) addition of new Ks around the primary Ks, forming a primary group (PG): either by replication of the primary couple (2 × 2A inKarotomorpha;2 × 2A inPhaeopolykrikos;4(2 × 2A) inPolkrikos), or by addition of new Ks (N) without copy or replication of the primary Ks (2A + 2N inPolytomella; 2A +3N inTetratrichomonas; 2A + 3N inTetratrichomonas; 2A + 4N inHexamastix; 2A + 6N inPyramimonas octopus). b) amplification of each constituent of the primordial couple in opalinids. c) amplification of the primary group [yx(AA+ 2N) withy = 2 in diplomonadida andy > 2 in calonymphidae. d) appearance in morphogenetic fields situated outside the primary group (but possibly related to it) of new Ks which then form secondary groups (SG) where they are arranged in polarized rows composed of juxtaposed cortical units (monokinetids). In this case, PG can be of type 2A+2N (1PG+1SG in lophomonadida; 1PG+2SG in some trichonymphina), or can lose some Ks, resulting in reduced PG (4 reduced PG+4GS inStaurojoenina, n reduced PG +nGS in spirotrichonymphina). The PG may even disappear; either partially leaving remnants in the form of MTOCs inStephanopogon, or completely, as in cilliates where the general ciliature would represent on the SG. From the above, it is seen that: a) the pluriflagellar state in protists depends on only a small number of factors; b) the same factors are used in different groups; c) different states have been obtained within different groups. An analysis of the respective evolution of kinetosomes and centrioles is proposed.
Published: 1988
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40. Oscillospira guillermondii, Bactérie du Rumen: Etude Ultrastructurale du Trichome et de la Sporulation

Author: J. Grain and J. Senaud
Subjects: Anatomy, Molecular Biology
Abstract: Oscillospira guillermondii , tres particuliere par son organisation en trichome, possede cependant des caracteres typiques de bacterie Gram-positive (enveloppes, sporulation). La capsule enveloppe l'ensemble du trichome, la paroi longe la capsule, separe les cellules et forme des septums primaires et secondaires repoussant devant eux la membrane plasmique. Les reserves cytoplasmiques sont des polysaccharides acides. Les relations membrane plasmiquenoyau y sont nettes. L'etat de predivision permanente des cellules est une particularite qui a sans doute des consequences importantes sur les modalites de separation des chromosomes-fils apres replication. Enfin, la paroi bacterienne participe a la formation du cortex de la spore, qui, par ailleurs, s'edifie comme chez Clostridium et Bacillus .
Published: 1976
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41. Influence de la fréquence des repas sur le comportement alimentaire du mouton et sur les variations de densité des populations de ciliés au cours du nycthémère

Author: J. Senaud, P. De Puytorac, J. Grain, J. P. Jouany, and Revues Inra, Import
Subjects: [SDV.BA] Life Sciences [q-bio]/Animal biology, [SDV.BBM.BP] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics, General Medicine, Biology, [SDV.BBM.BC] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM], Humanities
Published: 1977
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42. Essai ďApplication de ľAnalyse Phénétique à la Classification du Phylum des Ciliophora

Author: J. Devaux, P. Legendre, J. Grain, and P. de Puytorac
Subjects: Parasitology, Taxonomy (biology), Biology, Humanities
Abstract: Les relations de similarite ont ete calculees par analyse phenetique entre 59 genres et especes en considerant 122 caracteres ultrastructuraux, morphologiques, stonatogenetiques, nucleaires ou de reproduction asexuee. Sur la base des resultats obtenus une nouvelle classification peut etre avancee. Trois subphylums sont discernables: Karyorelictophora; Kinetophragminophora et Hymenophora avec respectivement 1 classe (Karyorelictea) 4 classes (Colpodea, Hypostomea, Spirotrichea et Hymerostomea) et 2 classes (Phyllopharyngea, Gymnostomea)
Published: 1984
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43. A Newly Revised Classification of the Protozoa*

Author: Iii. J. Lom, F. G. Wallace, F. C. Page, G. Poljansky, John O. Corliss, E. G. Merinfeld, Alfred R. Loeblich, F. E. G. Cox, G. F. Leedale, J. Vavra, J. Grain, D. Lynn, Norman D. Levine, V. Sprague, B. M. Honigberg, and G. Deroux
Subjects: Taxon, Phylum, Microspora, Zoology, Protozoa, Parasitology, Taxonomy (biology), Labyrinthomorpha, Biology, biology.organism_classification, Nomenclature, Subkingdom
Abstract: The subkingdom Protozoa now inclues over 65,000 named species, of which over half are fossil and approximately 10,000 are parasitic. Among living species, this includes approximately 250 parasitic and 11,300 free-living sarcodines (of which approximately 4,600 are foraminiferids); approximately 1,8000 parasitic and 5,100 free-living flagellates; approximately 5,600 parasitic "Sporozoa" (including Apicomplexa, Microspora, Myxospora, and Ascetospora); and approximately 2,5000 parasitic and 4,700 free-living ciliates. There are undoubtedly thousands more still unnamed. Seven phyla of PROTOZOA are accepted in this classification--SARCOMASTIGOPHORA, LABYRINTHOMORPHA, APICOMPLEXA, MICROSPORA, ASCETOSPORA, MYXOSPORA, and CILIOPHORA. Diagnoses are given for these and for all higher taxa through suborders, and reporesentative genera of each are named. The present scheme is a considerable revision of the Society's 1964 classification, which was prepared at a time when perhaps 48,000 species had been named. It has been necessitated by the acquisition of a great deal of nex taxonomic information, much of it through electron microscopy. It is hoped that the present classification incorporatesmost of the major changes that will be made for some time, and that it will be used for many years by both protozoologist and non-protozoologists.
Published: 1980
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44. Biochemical Study of Proteins of Cortical Cytoskeleton in the CiliateIsotricha prostoma1

Author: Claude-Alain Grolière, Bernard Vigues, G. Metenier, J. Grain, and J. Senaud
Subjects: Gel electrophoresis, Tubulin, Biochemistry, Molecular mass, Heavy meromyosin, Organelle, Ultrastructure, biology.protein, Parasitology, macromolecular substances, Biology, Cytoskeleton, Actin
Abstract: In Isotricha prostoma, proteins of isolated cortices retaining the ecto-endoplasmic fibrillar boundary (EEB) have been separated by one- and two-dimensional gel electrophoresis. In addition to that of tubulin, four main bands corresponding to polypeptide molecular weights of 185, 35, 23, and 22 kd have been observed on 9% SDS-polyacrylamide gels. Supernumerary major bands within a low molecular weight range (11-19 kd) are evident after separation on 7.5-15% polyacrylamide gradient gels. Two-dimensional analysis discloses - 150 polypeptide spots, most of them focusing within an acidic pl range 4.6-5.3. The cortical fibrillar structures are still distinguishable after incubation in solutions containing 1.0 M K. Cl (12 h) or 0.6 M Kl (8 h). A prolonged KI treatment (52 h), however, results in the removal of EEB filaments (˜4 nm in diameter) and of a large part of the kinetid elements, so that the insoluble material is mainly represented by a reticulum of 6-nm filaments interconnecting the proximal regions of kinetosomes. Two proteins with MW of 58 and 63 kd appear to be constituents of this kinetosome-associated filamentous reticulum. Some of the cortical proteins with MW ≤23 kd are the most likely candidates for components of EEB filaments. The absence of decoration with heavy meromyosin confirms that actin is not a major component of Isotricha cortical cytoskeleton.
Published: 1985
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45. Effect of defaunating the rumen

Author: Daniël Demeyer, J. Grain, J.-P. Jouany, Station de recherches sur la nutrition des herbivores, Institut National de la Recherche Agronomique (INRA), and ProdInra, Migration
Subjects: 0303 health sciences, Defaunation, Ecology, 0402 animal and dairy science, 04 agricultural and veterinary sciences, Biology, 040201 dairy & animal science, 03 medical and health sciences, Rumen, Animal science, [SDV.SA.SPA]Life Sciences [q-bio]/Agricultural sciences/Animal production studies, Animal Science and Zoology, [SDV.SA.SPA] Life Sciences [q-bio]/Agricultural sciences/Animal production studies, ComputingMilieux_MISCELLANEOUS, 030304 developmental biology
Abstract: The effects of defaunation have been extensively studied during the last 10 years. Results in the literature suggest that elimination of protozoa greatly modified the microbial environment of the rumen. In consequence, defaunation influences the intensity of fermentation and its qualitative evolution. These modifications are not systematic and results vary with the experiment. In this paper, the authors will try to point out the changes in digestion caused by defaunation and how these factors interact to affect the resultant animal performance.
Published: 1988

46. [Oscillospira guillermondii, a rumen bacteria: ultrastructural study of the trichome and of sporulation]

Author: J, Grain and J, Senaud
Subjects: Cell Nucleus, Inclusion Bodies, Spores, Bacterial, Cytoplasm, Sheep, Bacteria, Cell Membrane, Animals
Published: 1976

47. Comparaisons du comportement alimentaire de 2 Protozoaires Ciliés du rumen, Epidinium caudatum, Polyplastron multivesiculatum : mécanismes d'ingestion et de digestion (*)

Author: J. Senaud, J. Bohatier, J. Grain, and Revues Inra, Import
Subjects: Embryology, [SDV.AEN] Life Sciences [q-bio]/Food and Nutrition, Reproductive Medicine, [SDV.BDD] Life Sciences [q-bio]/Development Biology, Medicine (miscellaneous), Animal Science and Zoology, Biology, [SDV.BDLR] Life Sciences [q-bio]/Reproductive Biology, Developmental Biology, Food Science
Published: 1986

48. Ciliate implantation in the rumen: influence of inoculated genus and type of diet

Author: J, Grain, C A, Groliere, J, Senaud, P, de Puytorac, B, Zainab, and J P, Jouany
Subjects: Rumen, Sheep, Animals, Hordeum, Ciliophora, Animal Feed, Medicago sativa
Published: 1979

49. [The importance of electron microscopy in the systematics of unicellular organisms: for example, the ciliates of the genus Cyclogramma]

Author: J, Grain, R K, Peck, P, Didier, and M, Rodrigues
Subjects: Organoids, Microscopy, Electron, Cilia, Ciliophora
Abstract: With a parorale of "stichodyade-type", and three adoral organelles like peniculus, the genus Cyclogramma may be included in the Oligohymenophora class, subclass Hymenostomata. The presence of a basket as cytopharyngeal apparatus, and the semi-autonomous stomatogenesis justify, for this genus, the establishment of the new order Parahymenostomatida.
Published: 1976

50. [Interaction among anaerobic microbe species in the rumen]

Author: P, Gouet, J, Grain, H C, Dubourguier, and G, Albagnac
Subjects: Rumen, Hydrolysis, Fatty Acids, Eukaryota, Bacteria, Anaerobic, Glucose, Cell Wall, Polysaccharides, Fermentation, Lactates, Animals, Pectins, Lactic Acid, Cellulose, Methane, Artiodactyla, Hydrogen
Abstract: The rumen is a strictly anaerobic ecosystem colonized by an extremely dense microflora and microfauna. These populations are composed of a grand variety of bacterial and protozoal species. Their cohabitation allows observation of most of the known stages of communal life. The different hydrolytic, fermentative and methanogenic activities of these populations ensure the efficient degradation of cell wall constituent in forages (cellulose, hemicellulose, pectin) ingested by ruminants.
Published: 1986

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