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21 results on '"Cabrera Perez, Juan"'

1. Reflectivity of Venus's Dayside Disk During the 2020 Observation Campaign: Outcomes and Future Perspectives

Author

Lee, Yeon Joo, Garcia Munoz, A., Yamazaki, Atsushi, Quemerais, Eric, Mottola, Stefano, Hellmich, Stephan, Granzer, T., Roth, M., Gallego-Cano, E., Chaufray, Jean-Yves, Robidel, R, Murakami, G., Masunaga, K., Kaplan, Murat, Hueso, R., Kabath, P., Spokova, M., Sanchez-Lavega, A., Kim, Myung-Jin, Mangano, Valeria, Jessup, Kandis Lea, Widemann, Thomas, Sugiyama, Ko-ichiro, Watanabe, Shigeto, Yamada, M., Satoh, Takehiko, Nakamura, M., Imai, Masataka, and Cabrera Perez, Juan

Subjects
Atmospheric clouds, Planetary science, Venus, Observational astronomy, Solar system astronomy, Planetary atmospheres, Astrophysics - Earth and Planetary Astrophysics
Published
2022

2. Effect of improved atmospheric opacities in modelling sub-Neptunes

Author

MacKenzie, Jasmine, Grenfell, John Lee, Baumeister, Philipp, Tosi, Nicola, Cabrera Perez, Juan, and Rauer, H

Subjects
interiors, satellites, planets, composition, Space and Planetary Science, 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften, atmospheres, Astronomy and Astrophysics, GJ 1214 b, GJ1214b, fundamental parameters
Abstract

Aims. We investigate the impact of updated atmospheric mean opacity input values on modelled transit radius and the distribution of interior layer mass fractions. Methods. We developed and applied a coupled interior-atmosphere model. Our straightforward semi-grey calculation of atmospheric temperature enables us to perform thousands of model realisations in a Monte Carlo approach to address potential degeneracies in interior and atmospheric mass fraction. Our main constraints are planetary mass and radius from which our model infers distributions of the internal structure of exoplanetary classes ranging from Super-Earth to Mini-Neptune. We varied the relative masses of gas, envelope, mantle, and core layers subject to constraints on the bulk density from observations, and investigated the effect of updating atmospheric mean opacities. Results. First, we validate our model output with observed temperature profiles for modern Neptune. We can reproduce the basic features in the middle atmosphere but not the temperature inversion in the upper layers, which is likely because our model lacks aerosol heating. Calculated interiors are generally consistent with modern Neptune. Second, we compare with the well-studied object GJ 1214 b and obtain results that are broadly consistent with previous findings; they suggest correlations between modelled gas, water, and core mass fractions, although these are generally weak. Updating the opacities leads to a change on the order of a few percent in the modelled transit radius. This is comparable in magnitude to the planned accuracy of the PLATO data for planetary radius, suggesting that the opacity update in the model is important to implement.

Published
2023

3. The PLATO mission design and status

Author

Alvarez, Jose Lorenzo, Marliani, Filippo, Heras, Ana, Walloschek, Thomas, Gaido, Marco, Huesler, Joseph, Whitaker, Amadou, Aroca, José, Winton, Alistair, Teti, Daniele, Harrison, Ian, Boquet, Fabrice, Cesa, Marco, Laget, Philippe, Kanitz, Thomas, Niemi, Sami-Matias, Levillain, Yves, Goulty, Duncan, Madden, Sean, Windsor, James, Rodriguez Garcia, Juan Pablo, Torres, Nadia Hidalgo, Brown, Beverly, O'Rourke, Laurence, Kidger, Mark, Milligan, David, Foley, Steve, Molendini, Francesca, Ermocida, Marco, Sacchetti, Andrea, Steier, Frank, León Perez, Laura, Petit, Jean-Luc, Walther, Christian, Pertenais, Martin, Erikson, A, Cabrera Perez, Juan, Martin Garcia, Cesar, Rauer, H, Pagano, Isabella, and Mas-Hesse, Miguel

Subjects
exoplanets, Thermo elastic distorsion, visible refractive optics, photometer, asteroseismology, Fine Guidance Sensor, PLATO, camera
Published
2022

4. The PLATO field selection process

Author

Nascimbeni, V., Piotto, G, Börner, Anko, Montalto, M., Marrese, P. M., Cabrera Perez, Juan, Marinoni, S., Aerts, C., Altavilla, G., Benatti, S., Claudi, R., Deleuil, M., Desidera, S., Fabrizio, M., Gizon, L., Goupil, M.J., Granata, V., Heras, A. M., Magrin, D., Malavolta, L., Mas-Hesse, J. Miguel, Ortolani, S., Pagano, I., Pollacco, D., Prisinzano, L., Ragazzoni, R., Ramsay, G., Rauer, H, and Udry, S.

Subjects
photometric, detection, astronomical databases, planetary systems, catalogs, fundamental parameters
Published
2022

8. Transit detection of the long-period volatile-rich super-Earth ν² Lupi d with CHEOPS

Author

Delrez, Laetitia, Ehrenreich, David, Alibert, Yann, Bonfanti, Andrea, Borsato, Luca, Fossati, Luca, Hooton, Matthew J., Hoyer, Sergio, Pozuelos, Francisco J., Salmon, Sébastien, Sulis, Sophia, Wilson, Thomas G., Adibekyan, Vardan, Bourrier, Vincent, Brandeker, Alexis, Charnoz, Sebastien, Deline, Adrien, Guterman, Pascal, Haldemann, Jonas, Hara, Nathan, Oshagh, Mahmoudreza, Sousa, Sérgio G., Van Grootel, Valérie, Alonso Sobrino, Roi, Anglada-Escudé, Guillem, Bárczy, Tamás, Barrado, David, Barros, Susana C.C., Baumjohann, Wolfgang, Beck, Mathias, Bekkelien, Anja, Benz, Willy, Billot, Nicolas, Bonfils, Xavier, Broeg, Christopher, Cabrera Perez, Juan, Collier Cameron, Andrew, Davies, Melvyn. B., Deleuil, Magali, Delisle, Jean-Baptiste, Demangeon, Olivier D.S., Demory, Brice-Olivier, Erikson, Anders, Fortier, Andrea, Fridlund, Malcolm, Futyan, David, Gandolfi, Davide, Garcia Muñoz, Antonio, Gillon, Michael, Guedel, Manuel, Heng, Kevin, Kiss, Laszlo, Laskar, Jacques, Lecavelier des Etangs, Alain, Lendl, Monika, Lovis, Christophe, Maxted, Pierre F. L., Nascimbeni, Valerio, Olofsson, Göran, Osborn, Hugh P., Pagano, Isabella, Palle, Enric, Piotto, Giampaolo, Pollacco, Don, Queloz, Didier, Rauer, Heike, Ragazzoni, Roberto, Ribas, Ignasi, Santos, Nuno C., Scandariato, Gaetano, Ségransan, Damien, Simon, Attila E., Smith, Alexis M S, Steller, Manfred, Szabó, Gyula M., Thomas, Nicolas, Udry, Stephane, and Walton, Nicholas A.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Published
2021

9. PLATO Performance Update

Author

Cabrera Perez, Juan, Rauer, Heike, Börner, Anko, Paproth, Carsten, Griessbach, Denis, Samadi, R., and Appourchaux, T.

Subjects
planet detection, PLATO, performance
Published
2021

11. The Multiplanet System TOI-421*: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary*

Author

Carleo, Ilaria, Gandolfi, Davide, Barragan, Oscar, Livingston, John H., Persson, Carina M., Lam, Kristine W.F., Vidotto, Aline, Lund, Michael B., D'Angelo, Carolina Villarreal, Collins, Karen A., Fossati, Luca, Howard, Andrew W., Kubyshkina, Daria, Brahm, Rafael, Oklopvić, Antonija, Mollière, Paul, Redfield, Seth, Serrano, Luisa Maria, Dai, Fei, Fridlund, Malcolm, Borsa, Francesco, Korth, Judith, Esposito, Massimiliano, Díaz, Matías R., Nielsen, Louise Dyregaard, Hellier, Coel, Mathur, Savita, Deeg, Hans J., Hatzes, Artie P., Benatti, Serena, Rodler, Florian, Alarcon, Javier, Spina, Lorenzo, Santos, Ângela R.G., Georgieva, Iskra, Garcia, Rafael A., Gonzalez-Cuesta, Lucia, Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Albrecht, Simon, Batalha, Natalie M., Beard, Corey, Boyd, Patricia T., Bouchy, Francois, Burt, Jennifer A., Butler, R. Paul, Cabrera Perez, Juan, Chontos, Ashley, Ciardi, David R., Cochran, William D., Collins, Kevin I., Crane, Jeffrey D., Crossfield, Ian J.M., Csizmadia, Szilard, Dragomir, Diana, Dressing, Courtney, Eigmüller, Philipp, Endl, Michael, Erikson, Anders, Espinoza, Néstor, Fausnaugh, Michael, Feng, Fabo, Flowers, Erin, Fulton, Benjamin, Gonzales, Erica J., Grieves, Nolan, Grziwa, Sascha, Guenther, Eike W., Guerrero, Natalia M., Henning, Thomas, Hidalgo, Diego, Hirano, Teruyuki, Hjorth, Maria, Huber, Daniel, Isaacson, Howard, Jones, Matias, Jordán, Andrés, Kabath, Petr, Kane, Stephen R., Knudstrup, Emil, Lubin, Jack, Luque, Rafael, Mireles, Ismael, Narita, Norio, Nespral, David, Niraula, Prajwal, Nowak, Grzegorz, Palle, Enric, Pätzold, Martin, Petigura, Erik A., Prieto-Arranz, Jorge, Rauer, H, Robertson, Paul, Rose, Mark E., Roy, Arpita, Sarkis, Paula, Schlieder, Joshua E., Ségransan, Damien, Shectman, Stephen, Skarka, Marek, Smith, Alexis M.S., Smith, Jeffrey C., Stassun, Keivan G., Teske, Johanna K., Twicken, Joseph D., Van Eylen, Vincent, Wang, Sharon X., Weiss, Lauren M., and Wyttenbach, Aurélien

Subjects
Extrasolare Planeten und Atmosphären, Radial velocity, Exoplanet astronomy, FOS: Physical sciences, Fundamental parameters of stars, Hot Neptunes, High resolution spectroscopy, Exoplanet systems, Mini Neptunes, Solar and Stellar Astrophysics (astro-ph.SR), QB600, Earth and Planetary Astrophysics (astro-ph.EP), Exoplanets, Leitungsbereich PF, Astrophysics - Solar and Stellar Astrophysics, Transit photometry, Astrophysics - Earth and Planetary Astrophysics
Abstract

We report the discovery of a warm Neptune and a hot sub-Neptune transiting TOI-421 (BD-14 1137, TIC 94986319), a bright (V = 9.9) G9 dwarf star in a visual binary system observed by the Transiting Exoplanet Survey Satellite (TESS) space mission in Sectors 5 and 6. We performed ground-based follow-up observations—comprised of Las Cumbres Observatory Global Telescope transit photometry, NIRC2 adaptive optics imaging, and FIbre-fed Echellé Spectrograph, CORALIE, High Accuracy Radial velocity Planet Searcher, High Resolution Échelle Spectrometer, and Planet Finder Spectrograph high-precision Doppler measurements—and confirmed the planetary nature of the 16 day transiting candidate announced by the TESS team. We discovered an additional radial velocity signal with a period of five days induced by the presence of a second planet in the system, which we also found to transit its host star. We found that the inner mini-Neptune, TOI-421 b, has an orbital period of Pb = 5.19672 ± 0.00049 days, a mass of Mb = 7.17 ± 0.66 M⊕, and a radius of Rb = ${2.68}_{-0.18}^{+0.19}$ R⊕, whereas the outer warm Neptune, TOI-421 c, has a period of Pc = 16.06819 ± 0.00035 days, a mass of Mc = ${16.42}_{-1.04}^{+1.06}$ M⊕, a radius of Rc = ${5.09}_{-0.15}^{+0.16}$ R⊕, and a density of ρc = ${0.685}_{-0.072}^{+0.080}$ g cm-3. With its characteristics, the outer planet (ρc = ${0.685}_{-0.072}^{+0.080}$ g cm-3) is placed in the intriguing class of the super-puffy mini-Neptunes. TOI-421 b and TOI-421 c are found to be well-suited for atmospheric characterization. Our atmospheric simulations predict significant Lyα transit absorption, due to strong hydrogen escape in both planets, as well as the presence of detectable CH4 in the atmosphere of TOI-421 c if equilibrium chemistry is assumed. * Based on observations made with ESO Telescopes at the La Silla Observatory under programs ID 1102.C-0923, 0103.C-0874, 0103.C-0759, 0103.C-0442, and 60.A-970. Based on observations obtained with the Nordic Optical Telescope (NOT), operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos (ORM) of the Instituto de Astrofísica de Canarias (IAC). This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile. This work makes use of observations from the LCOGT network.

Published
2020

13. Extrasolar planets: recent advances and future challenges

Author

Cabrera Perez, Juan, Godolt, Mareike, Grenfell, John Lee, Katyal, N, MacKenzie, Jasmine, Scheucher, M, Wunderlich, F., and Rauer, H

Subjects
Extrasolare Planeten und Atmosphären, Exoplanetary atmospheres, Leitungsbereich PF, CHEOPS, PLATO
Published
2020

14. The inputs to the PIC by the Performance Team

Author

Cabrera Perez, Juan, Rauer, H, and PLATO, Consortium

Subjects
Extrasolare Planeten und Atmosphären, exoplanets, transit detection, Leitungsbereich PF, asteroseismology, PLATO
Published
2019

15. PLATO Mission status update

Author

Cabrera Perez, Juan, Rauer, H, and PLATO, Consortium

Subjects
Extrasolare Planeten und Atmosphären, exoplanets, transit detection, Leitungsbereich PF, asteroseismology, PLATO
Published
2019

16. PLATO mission status

Author

Rauer, H, Cabrera Perez, Juan, and PLATO, Consortium

Subjects
exoplanets, transit detection, asteroseismology, PLATO
Published
2019

20. K2-295 b and K2-237 b: Two Transiting Hot Jupiters

Author

Smith, Alexis, Csizmadia, Szilard, Gandolfi, D., Albrecht, S., Alonso, R., Barragán, O., Cabrera Perez, Juan, Cochran, W.D., Dai, F., Deeg, H., Eigmüller, Philipp, Endl, M., Erikson, A, Fridlund, M., Fukui, A., Grziwa, S., Guenther, E.W., Hatzes, A.P., Hidalgo, D., Hirano, T., Korth, J., Kuzuhara, M., Livingston, J., Narita, N., Nespral, D., Niraula, P., Nowak, G., Palle, E., Pätzold, M., Persson, C.M., Prieto-Arranz, J., Rauer, H, Redfield, S., Ribas, I., and Van Eylen, V.

Subjects
Extrasolare Planeten und Atmosphären, GYROCHRONOLOGY, Planets, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, COOL STARS, SPECTROGRAPH, Astrophysics::Galaxy Astrophysics, Satellites: individual: K2-295, LIGHT CURVES, Earth and Planetary Astrophysics (astro-ph.EP), Planets and satellites: individual: K2-295, Planetary systems, Planets and satellites: detection, Satellites: individual: K2-295, K2-237, Leitungsbereich PF, individual: K2-295, K2-237 [Planets and satellites], COMPANIONS, ATMOSPHERE, EXOPLANETS, MODEL, detection [Planets and satellites], K2-237, Astrophysics::Earth and Planetary Astrophysics, EXTRASOLAR PLANETS, Astrophysics - Earth and Planetary Astrophysics
Abstract

We report the discovery from K2 of two transiting hot Jupiter systems. K2-295 (observed in Campaign 8) is a K5 dwarf which hosts a planet slightly smaller than Jupiter, orbiting with a period of 4.0 d. We have made an independent discovery of K2-237 b (Campaign 11), which orbits an F6 dwarf every 2.2 d and has an inflated radius 50 - 60 per cent larger than that of Jupiter. We use high-precision radial velocity measurements, obtained using the HARPS and FIES spectrographs, to measure the planetary masses. We find that K2-295 b has a similar mass to Saturn, while K2-237 b is a little more massive than Jupiter., Comment: 26 pages, 12 figures, accepted for publication in Acta Astronomica

Published
2019

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