The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS

Lendl, M. and Csizmadia, Szilard and Deline, A. and Fossati, L. and Kitzmann, D. and Heng, K. and Hoyer, S. and Salmon, S. and Benz, W. and Broeg, Chris and Ehrenreich, David and Fortier, Andrea and Queloz, D. and Bonfanti, A. and Brandeker, A. and Collier Cameron, A and Delrez, L. and Garcia Munoz, A. and Hooton, M. J. and Maxted, P. F. L. and Morris, B. M. and Van Grootel, V. and Wilson, T. G. and Alibert, Y. and Alonso, R and Asquier, J. and Bandy, T. and Bàrczy, T. and Barrado, D. and Barros, S. C. C. and Baumjohann, W. and Beck, M. and Beck, T. and Bekkelien, A. and Bergomi, M. and Billot, N. and Biondi, F. and Bonfils, X. and Bourrier, V. and Busch, M.-D. and Cabrera Perez, Juan and Cessa, Virginie and Charnoz, S. and Chazelas, B. and Corral Van Damme, C. and Davies, M. B. and Deleuil, M. and Demangeon, O. D. S. and Demory, B.-O. and Erikson, A and Farinato, J. and Fridlund, M and Futyan, D. and Gandolfi, D. and Gillon, M. and Guterman, P and Hasiba, J and Hernandez, E. and Isaak, K. G. and Kiss, L. and Kuntzer, T. and Lecavelier des Etangs, A. and Lüftinger, T and Laskar, J. and Lovis, C. and Magrin, D. and Malvasio, L. and Marafatto, L. and Michaelis, Harald and Munari, M. and Nascimbeni, V. and Olofsson, G. and Ottacher, H and Ottensamer, R. and Pagano, I. and Palle, E. and Peter, Gisbert and Piazza, D. and Piotto, G. and Pollacco, D. and Ratti, F. and Rauer, H and Ragazzoni, R. and Rando, N. and Ribas, I. and Rieder, M. and Rohlfs, R. and Safa, F. and Santos, N. C. and Scandariato, G. and Segransan, D. and Simon, A. E. and Singh, V. and Smith, Alexis M S and Sordet, M. and Sousa, S. G. and Steller, Manfred and Szabo, Gy. M. and Thomas, N. and Tschentscher, M. and Udry, S. and Viotto, V. and Walter, Ingo and Walton, NA and Wildi, F. and Wolter, D. (2020) The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS. Astronomy & Astrophysics, 643 (A94), pp. 1-10. EDP Sciences. doi: 10.1051/0004-6361/202038677. ISSN 0004-6361.

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Official URL: https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202038677

Abstract

The CHEOPS space mission dedicated to exoplanet follow-up was launched in December 2019, equipped with the capacity to perform photometric measurements at the 20 ppm level. As CHEOPS carries out its observations in a broad optical passband, it can provide insights into the reflected light from exoplanets and constrain the short-wavelength thermal emission for the hottest of planets by observing occultations and phase curves. Here, we report the first CHEOPS observation of an occultation, namely, that of the hot Jupiter WASP-189 b, a MP ≈ 2MJ planet orbiting an A-type star. We detected the occultation of WASP-189 b at high significance in individual measurements and derived an occultation depth of dF = 87:9 ± 4:3 ppm based on four occultations. We compared these measurements to model predictions and we find that they are consistent with an unreflective atmosphere heated to a temperature of 3435 ± 27 K, when assuming inefficient heat redistribution. Furthermore, we present two transits of WASP-189 b observed by CHEOPS. These transits have an asymmetric shape that we attribute to gravity darkening of the host star caused by its high rotation rate. We used these measurements to refine the planetary parameters, finding a ∼ 25% deeper transit compared to the discovery paper and updating the radius of WASP-189 b to 1:619 ± 0:021RJ. We further measured the projected orbital obliquity to be λ = 86:4+2:9−4:4 deg, a value that is in good agreement with a previous measurement from spectroscopic observations, and derived a true obliquity of Ψ = 85:4 ± 4:3 deg. Finally, we provide reference values for the photometric precision attained by the CHEOPS satellite: for the V=6.6 mag star, and using a one-hour binning, we obtain a residual RMS between 10 and 17 ppm on the individual light curves, and 5.7 ppm when combining the four visits.

Item URL in elib:

https://elib.dlr.de/134381/

Document Type:

Article

Title:

The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Lendl, M.	Space Research Institute, Austrian Academy of Sciences	UNSPECIFIED	UNSPECIFIED
Csizmadia, Szilard	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Deline, A.	Université de Genève	UNSPECIFIED	UNSPECIFIED
Fossati, L.	Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042, Graz, Austria	UNSPECIFIED	UNSPECIFIED
Kitzmann, D.	Center for Space and Habitability, University of Bern, Gesellschaftsstraße 6, 3012, Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Heng, K.	Center for Space and Habitability, University of Bern, Gesellschaftsstraße 6, 3012, Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Hoyer, S.	Laboratoire d’Astrophysique de Marseille, Univ. de Provence, France	UNSPECIFIED	UNSPECIFIED
Salmon, S.	STAR, Université de Liège, Belgium	UNSPECIFIED	UNSPECIFIED
Benz, W.	Physikalisches Institut, University of Bern, Schweiz	UNSPECIFIED	UNSPECIFIED
Broeg, Chris	University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Ehrenreich, David	University of Geneva, Switzerland	UNSPECIFIED	UNSPECIFIED
Fortier, Andrea	University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Queloz, D.	Cavendish Laboratory, J J Thomson Avenue, Cambridge CB3 0HE, UK	UNSPECIFIED	UNSPECIFIED
Bonfanti, A.	Space Research Institute, Austrian Academy of Sciences, Austria	UNSPECIFIED	UNSPECIFIED
Brandeker, A.	Department of Astronomy , Stockholm University, SE-106 91 Stockholm, Sweden	UNSPECIFIED	UNSPECIFIED
Collier Cameron, A	University of St Andrews	UNSPECIFIED	UNSPECIFIED
Delrez, L.	Institut d’Astrophysique et de Geophysique, Universite de Liege, Belgium	UNSPECIFIED	UNSPECIFIED
Garcia Munoz, A.	Zentrum für Astronomie und Astrophysik, Technische Universität Berlin, Hardenbergstra_e 36, 10623 Berlin, Germany	UNSPECIFIED	UNSPECIFIED
Hooton, M. J.	University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Maxted, P. F. L.	Astrophysics Group, Keele University, UK	UNSPECIFIED	UNSPECIFIED
Morris, B. M.	Center for Space and Habitability, University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Van Grootel, V.	STAR, Université de Liège, Belgium	UNSPECIFIED	UNSPECIFIED
Wilson, T. G.	School of Physics and Astronomy, St. Andrews, UK	UNSPECIFIED	UNSPECIFIED
Alibert, Y.	University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Alonso, R	Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife,	UNSPECIFIED	UNSPECIFIED
Asquier, J.	ESA/ESTEC, Niederlande	UNSPECIFIED	UNSPECIFIED
Bandy, T.	Physikalisches Institut,University of Bern, Sidlerstraße 5, CH-3012 Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Bàrczy, T.	Admatis, Miskolc, Hungary	UNSPECIFIED	UNSPECIFIED
Barrado, D.	Departamento de Astrofisica, Centro de Astrobiologia (INTA-CSIC), Campus ESAC (ESA)Camino Bajo del Castillo s/n 28692 Villanueva de la Canada, Spain	UNSPECIFIED	UNSPECIFIED
Barros, S. C. C.	Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal	UNSPECIFIED	UNSPECIFIED
Baumjohann, W.	Space Research Institute, Graz, Austria	UNSPECIFIED	UNSPECIFIED
Beck, M.	Université de Genève, Switzerland	UNSPECIFIED	UNSPECIFIED
Beck, T.	Center for Space and Habitability, University of Bern, Gesellschaftsstraße 6, 3012, Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Bekkelien, A.	Université de Genève, Switzerland	UNSPECIFIED	UNSPECIFIED
Bergomi, M.	INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy	UNSPECIFIED	UNSPECIFIED
Billot, N.	Université de Genève, Switzerland	UNSPECIFIED	UNSPECIFIED
Biondi, F.	INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy	UNSPECIFIED	UNSPECIFIED
Bonfils, X.	Université Grenoble Alpes, France	UNSPECIFIED	UNSPECIFIED
Bourrier, V.	Université de Genève, Switzerland	UNSPECIFIED	UNSPECIFIED
Busch, M.-D.	University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Cabrera Perez, Juan	UNSPECIFIED	https://orcid.org/0000-0001-6653-5487	UNSPECIFIED
Cessa, Virginie	University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Charnoz, S.	Institut de Physique du Globe de Paris, France	UNSPECIFIED	UNSPECIFIED
Chazelas, B.	Universite de Geneve, Switzerland	UNSPECIFIED	UNSPECIFIED
Corral Van Damme, C.	ESA/ESTEC, Niederlande	UNSPECIFIED	UNSPECIFIED
Davies, M. B.	Lund Observatory, Department of Astronomy and Theoretical Physics, Lund University, 22100, Lund, Sweden	UNSPECIFIED	UNSPECIFIED
Deleuil, M.	Aix-Marseille Universite, CNRS, CNES, LAM, Marseille, France	UNSPECIFIED	UNSPECIFIED
Demangeon, O. D. S.	Laboratoire d’Astrophysique de Marseille, Univ. de Provence, France	UNSPECIFIED	UNSPECIFIED
Demory, B.-O.	Observatoire de Geneve	UNSPECIFIED	UNSPECIFIED
Erikson, A	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Farinato, J.	INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy	UNSPECIFIED	UNSPECIFIED
Fridlund, M	Leiden Observatory, University of Leiden, PO Box 9513, 2300 RA,	UNSPECIFIED	UNSPECIFIED
Futyan, D.	Universite de Geneve, Switzerland	UNSPECIFIED	UNSPECIFIED
Gandolfi, D.	INAF, Osservatorio Astrofisico di Torino, Italy	UNSPECIFIED	UNSPECIFIED
Gillon, M.	Institut d'Astrophysique et de Géophysique, Universitée de Liège, Allée du 6 août 17, B-4000 Liège, Belgium	UNSPECIFIED	UNSPECIFIED
Guterman, P	LAM Université de Provence	UNSPECIFIED	UNSPECIFIED
Hasiba, J	Österreichische Akademie der Wissenschaften	UNSPECIFIED	UNSPECIFIED
Hernandez, E.	Center for Space and Habitability, Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Isaak, K. G.	ESA/ESTEC, Niederlande	UNSPECIFIED	UNSPECIFIED
Kiss, L.	Konkoly Observatory, Research Centre for Astronomy and Earth, Budapest, Hungary	UNSPECIFIED	UNSPECIFIED
Kuntzer, T.	Universite de Geneve, Switzerland	UNSPECIFIED	UNSPECIFIED
Lecavelier des Etangs, A.	Institut d Astrophysique de Paris, CNRS, UMR 7095 & Sorbonne Universites, UPMC Paris 6, 98 bis bd Arago, 75014 Paris, France	UNSPECIFIED	UNSPECIFIED
Lüftinger, T	University of Vienna, Dept. of Astrophysics, Türkenschanzstr. 17, 1180, Vienna, Austria	UNSPECIFIED	UNSPECIFIED
Laskar, J.	IMCCE, Obs. de Paris	UNSPECIFIED	UNSPECIFIED
Lovis, C.	Observatoire de l Universite de Geneve, 51 chemin des Maillettes, 1290 Sauverny, Switzerland	UNSPECIFIED	UNSPECIFIED
Magrin, D.	INAF, Astronomical Institute, Padua, Italy	UNSPECIFIED	UNSPECIFIED
Malvasio, L.	Center for Space and Habitability, Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Marafatto, L.	INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy	UNSPECIFIED	UNSPECIFIED
Michaelis, Harald	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Munari, M.	INAF - Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, Italy	UNSPECIFIED	UNSPECIFIED
Nascimbeni, V.	INAF – Osservatorio Astronomico di Padova, vicolo dell Osservatorio 5, 35122 Padova, Italy	UNSPECIFIED	UNSPECIFIED
Olofsson, G.	Department of Astronomy, Stockholm University, Sweden	UNSPECIFIED	UNSPECIFIED
Ottacher, H	Österreichische Akademie der Wissenschaften	UNSPECIFIED	UNSPECIFIED
Ottensamer, R.	University of Vienna, Department of Astrophysics, Austria	UNSPECIFIED	UNSPECIFIED
Pagano, I.	INAF – Osservatorio Astrofisico di Catania, Via S.Sofia 78, 95123 Catania, Italy	UNSPECIFIED	UNSPECIFIED
Palle, E.	Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Peter, Gisbert	DLR Institute of Optical Sensor Systems, Germany	UNSPECIFIED	UNSPECIFIED
Piazza, D.	physics institute, space research & planetary sciences, university of bern, sidlerstr. 5, ch-3012 bern, switzerland	UNSPECIFIED	UNSPECIFIED
Piotto, G.	INAF – Osservatorio Astronomico di Padova, vicolo dell Osservatorio 5, 35122 Padova, Italy	UNSPECIFIED	UNSPECIFIED
Pollacco, D.	Department of Physics, University of Warwick, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Ratti, F.	ESA/ESTEC, Niederlande	UNSPECIFIED	UNSPECIFIED
Rauer, H	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Ragazzoni, R.	INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy	UNSPECIFIED	UNSPECIFIED
Rando, N.	ESA/ESTEC, Niederlande	UNSPECIFIED	UNSPECIFIED
Ribas, I.	Institut de Ciencies de l'Espai (ICE, CSIC), Campus UAB, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), Barcelona, Spain	UNSPECIFIED	UNSPECIFIED
Rieder, M.	Physikalisches Institut,University of Bern, Sidlerstraße 5, CH-3012 Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Rohlfs, R.	Observatoire de Genève, Université de Genève, Switzerland	UNSPECIFIED	UNSPECIFIED
Safa, F.	ESA	UNSPECIFIED	UNSPECIFIED
Santos, N. C.	Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal; Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Rua Campo Alegre, 4169-007 Porto, Portugal	UNSPECIFIED	UNSPECIFIED
Scandariato, G.	INAF, Osservatorio Astrofisico di Catania, Italy	UNSPECIFIED	UNSPECIFIED
Segransan, D.	Observatoire de Geneve, Universite de Geneve, Switzerland	UNSPECIFIED	UNSPECIFIED
Simon, A. E.	Physikalisches Institut, University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Singh, V.	INAF, Osservatorio Astrofisico di Catania, Italy	UNSPECIFIED	UNSPECIFIED
Smith, Alexis M S	UNSPECIFIED	https://orcid.org/0000-0002-2386-4341	UNSPECIFIED
Sordet, M.	Observatoire de Geneve, Universite de Geneve, Switzerland	UNSPECIFIED	UNSPECIFIED
Sousa, S. G.	Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal	UNSPECIFIED	UNSPECIFIED
Steller, Manfred	Space Research Institute, Austria	UNSPECIFIED	UNSPECIFIED
Szabo, Gy. M.	Department of Experimental Physics & Astronomical Observatory, Szedeg, Hungary	UNSPECIFIED	UNSPECIFIED
Thomas, N.	Physikalisches Institut Universität Bern, Switzerland	UNSPECIFIED	UNSPECIFIED
Tschentscher, M.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Udry, S.	Observatoire de Geneve, Universite de Geneve, Switzerland	UNSPECIFIED	UNSPECIFIED
Viotto, V.	INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy	UNSPECIFIED	UNSPECIFIED
Walter, Ingo	DLR, Institut für Optische Sensorsysteme	UNSPECIFIED	UNSPECIFIED
Walton, NA	Institute of Astronomy, University of Cambridge, Cambridge, UK	UNSPECIFIED	UNSPECIFIED
Wildi, F.	University of Geneva, Switzerland	UNSPECIFIED	UNSPECIFIED
Wolter, D.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED

Date:

2020

Journal or Publication Title:

Astronomy & Astrophysics

Refereed publication:

Yes

Open Access:

Yes

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Yes

Volume:

643

DOI:

10.1051/0004-6361/202038677

Page Range:

pp. 1-10

Publisher:

EDP Sciences

ISSN:

0004-6361

Status:

Published

Keywords:

planetary systems, abundance pattern, exoplanet occultation

HGF - Research field:

Aeronautics, Space and Transport

HGF - Program:

Space

HGF - Program Themes:

Space Exploration

DLR - Research area:

Raumfahrt

DLR - Program:

R EW - Space Exploration

DLR - Research theme (Project):

R - Project CHEOPS

Location:

Berlin-Adlershof

Institutes and Institutions:

Institute of Optical Sensor Systems > Space Instruments
Institute of Planetary Research > Planetary Sensor Systems
Institute of Planetary Research > Extrasolar Planets and Atmospheres

Deposited By:

Dombrowski, Ute

Deposited On:

16 Oct 2020 10:09

Last Modified:

17 Nov 2020 09:54

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