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Your search keyword '"Petrov, Romain G."' showing total 14 results
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14 results on '"Petrov, Romain G."'

2. Hierarchical fringe tracking

Author

Kammerer, Jens, Sallum, Stephanie, Sanchez-Bermudez, Joel, Petrov, Romain G., Allouche, Fatmé, Hadjara, Massinissa, Boskri, Abdelkarim, Leftley, James, Berdja, Amokrane, and Lagarde, Stéphane

Published
2024
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3. MATISSE, the VLTI mid-infrared spectro-interferometric imager: achievements and perspectives

Author

Kammerer, Jens, Sallum, Stephanie, Sanchez-Bermudez, Joel, Petrov, Romain G., Lagarde, Stéphane, Lopez, Bruno, Robbe-Dubois, Sylvie, Leftley, James, Paladini, Claudia, Houllé, Mathis, Weigelt, Gerd, van Boekel, Roy, Jaffe, Walter, Woillez, Julien, Berio, Philippe, Bettonvil, Felix, Bourget, Pierre, Eldswijk, Eddy, Matter, Alexis, Meilland, Anthony, Millour, Florentin, Pallanca, Laurent, Rivinius, Thomas, and Zins, Gérard

Published
2024
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4. VERMILION: Visitor Extension spectRal sub-Mid-Infrared Light InterferOmeter iNstrument

Author

Mérand, Antoine, Sallum, Stephanie, Sanchez-Bermudez, Joel, Hadjara, Massinissa, Petrov, Romain G., Lagarde, Stéphane, Chen, Xinyang, He, Jinhua, Zhu, Lei, Lopez, Bruno, Millour, Florentin, Meilland, Anthony, Gallenne, Alexandre, Leftley, James, Boskri, Abdelkarim, Chen, Juncheng, Michael, Ernest, Diaz, Marcos, Mendez, Rene A., Bayo, Amelia, Piña, Miguel, Pereira, Gabriel, Manosalva, Sebastián, Nitschelm, Christian, Colque, Juan Pablo, Zhang, Congcong, Zhou, Dan, Allouche, Fatmé, Hao, Yinlei, Berdja, Amokrane, Besser, Felipe, Zélia Bechet, Clémentine Marie, Guesalaga Meissner, Andrés, Vanzi, Leonardo, Mezaoui, Abderrahmane, and Moussaoui, Nourredine

Published
2022
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5. MATISSE, the VLTI mid-infrared imaging spectro-interferometer at the time of the first published astrophysical results

Author

Mérand, Antoine, Sallum, Stephanie, Sanchez-Bermudez, Joel, Lagarde, Stéphane, Meilland, Anthony, Lopez, Bruno, Petrov, Romain G., Allouche, Fatmé, Matter, Alexis, Augereau, Jean-Charles, Berio, Phillippe, Bettonvil, Felix, van Boekel, Roy, Bristow, Paul, Cruzalèbes, Pierre, Danchi, William C., Glindemann, Andreas, Hadjara, Massinissa, Henninger, Mathias, Hogerheijde, Michiel, Jaffe, Walter, Leftley, James, Lehmitz, Michael, Millour, Florentin, Paladini, Claudia, Pantin, Eric, Riquelme, Miguel, Rivinius, Thomas, Robbe-Dubois, Sylvie, Schoeller, Markus, Varga, Jozsef, Weigelt, Gerd, Woillez, Julien, and Zins, Gérard

Published
2022
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6. Hierarchical Fringe Tracking, sky coverage and AGNs at the VLTI

Author

Mérand, Antoine, Sallum, Stephanie, Sanchez-Bermudez, Joel, Petrov, Romain G., Allouche, Fatmé, Boskri, Abdelkarim, Leftley, James, Hadjara, Massinissa, Rousseau, Sylvain, Lagarde, Stéphane, Lopez, Bruno, Millour, Florentin, Chen, Xinyang, Hao, Yinlei, Elhalkouj, Thami, and Benkhaldoun, Zouhair

Published
2022
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7. Thermal imaging of dust hiding the black hole in NGC 1068

Author

Gámez Rosas, Violeta, Isbell, Jacob W., Jaffe, Walter, Petrov, Romain G., Leftley, James H., Hofmann, Karl-Heinz, Millour, Florentin, Burtscher, Leonard, Meisenheimer, Klaus, Meilland, Anthony, Waters, Laurens B. F. M., Lopez, Bruno, Lagarde, Stéphane, Weigelt, Gerd, Berio, Philippe, Allouche, Fatme, Robbe-Dubois, Sylvie, Cruzalèbes, Pierre, Bettonvil, Felix, Henning, Thomas, Augereau, Jean-Charles, Antonelli, Pierre, Beckmann, Udo, van Boekel, Roy, Bendjoya, Philippe, Danchi, William C., Dominik, Carsten, Drevon, Julien, Gallimore, Jack F., Graser, Uwe, Heininger, Matthias, Hocdé, Vincent, Hogerheijde, Michiel, Hron, Josef, Impellizzeri, Caterina M. V., Klarmann, Lucia, Kokoulina, Elena, Labadie, Lucas, Lehmitz, Michael, Matter, Alexis, Paladini, Claudia, Pantin, Eric, Pott, Jörg-Uwe, Schertl, Dieter, Soulain, Anthony, Stee, Philippe, Tristram, Konrad, Varga, Jozsef, Woillez, Julien, Wolf, Sebastian, Yoffe, Gideon, and Zins, Gerard

Abstract

In the widely accepted ‘unified model’1solution of the classification puzzle of active galactic nuclei, the orientation of a dusty accretion torus around the central black hole dominates their appearance. In ‘type-1’ systems, the bright nucleus is visible at the centre of a face-on torus. In ‘type-2’ systems the thick, nearly edge-on torus hides the central engine. Later studies suggested evolutionary effects2and added dusty clumps and polar winds3but left the basic picture intact. However, recent high-resolution images4of the archetypal type-2 galaxy NGC 10685,6, suggested a more radical revision. The images displayed a ring-like emission feature that was proposed to be hot dust surrounding the black hole at the radius where the radiation from the central engine evaporates the dust. That ring is too thin and too far tilted from edge-on to hide the central engine, and ad hoc foreground extinction is needed to explain the type-2 classification. These images quickly generated reinterpretations of the dichotomy between types 1 and 27,8. Here we present new multi-band mid-infrared images of NGC 1068 that detail the dust temperature distribution and reaffirm the original model. Combined with radio data (J.F.G. and C.M.V.I., manuscript in preparation), our maps locate the central engine that is below the previously reported ring and obscured by a thick, nearly edge-on disk, as predicted by the unified model. We also identify emission from polar flows and absorbing dust that is mineralogically distinct from that towards the Milky Way centre.

Published
2022
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8. Commissioning MATISSE: operation and performances

Author

Tuthill, Peter G., Mérand, Antoine, Sallum, Stephanie, Petrov, Romain G., Allouche, Fatmé, Matter, Alexis, Meilland, Anthony, Lagarde, Stéphane, Berio, Philippe, Cruzalèbes, Pierre, Millour, Florentin, Robbe-Dubois, Sylvie, Jaffe, Walter, Hofmann, Karl-Heinz, Varga, Jozsef, Schertl, Dieter, Burtscher, Leonard, Meisenheimer, Klaus, Chelli, Alain, Zins, Gerard, Woillez, Julien, Schöller, Markus, and Lopez, Bruno

Published
2020
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13. Direct Detection of Hot Extrasolar Planets Using Differential Interferometry.

Author

Bergeron, Jacqueline, Renzini, Alvio, Lopez, Bruno, and Petrov, Romain G.

Abstract

We evaluate the potential of differential interferometry with the VLT or Keck interferometers for the direct detection and the study of atmospheric characteristics of hot giant extrasolar planets around nearby stars. Differential interferometry has been shown to allow unbiassed measurements of phase and/or visibility variations with wavelength. For a star and planet system like for any binary, these measurements at several orbital phases yield the angular separation and the spectrum of the components. We present an evaluation of the fundamental measurement uncertainty resulting from source and sky photon noise and detector noise. It shows that, with two 8 meters telescopes and a 40 meters baseline, we should detect Jupiter-like planets up to 0.1 or 0.2 astronomical units away from a solar type star at 10 pc. [ABSTRACT FROM AUTHOR]

Published
2000
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14. Commissioning MATISSE: first results

Author

Creech-Eakman, Michelle J., Tuthill, Peter G., Mérand, Antoine, Petrov, Romain G., Allouche, Fatmé, Berio, Philippe, Chelli, Alain, Cruzalèbes, Pierre, Fanteï, Yan, Jaffe, Walter, Glindemann, Andreas, Lagarde, Stéphane, Lopez, Bruno, Matter, Alexis, Meilland, Antony, Millour, Florentin, Morel, Sebastien, Paladini, Claudia, Rivinius, Thomas, Robbe-Dubois, Sylvie, Rousseau, Sylvain, Schöller, Markus, Varga, Jozsef, and Zins, Gérard

Published
2018
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