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Transiting exoplanets from the CoRoT space mission. XXIX. The hot Jupiters CoRoT-30 b and CoRoT-31 b

Borde, P. and Diaz, R. F. and Creevy, O and Damiani, C. and Deeg, H and Klagyivik, P. and Wuchterl, G and Gandolfi, D. and Fridlund, M and Bouchy, F. and Aigrain, S. and Alonso, R and Almenara, J and Baglin, A and Barros, S. C. C. and Bonomo, A and Cabrera Perez, Juan and Csizmadia, Szilard and Deleuil, M and Erikson, A and Ferraz Mello, S and Günther, E and Guillot, T and Grziwa, S and Hatzes, A and Hebrard, G and Mazeh, T and Ollivier, M and Parviainen, H and Patzold, M and Rauer, H. and Rouan, D and Santerne, A and Schneider, J (2020) Transiting exoplanets from the CoRoT space mission. XXIX. The hot Jupiters CoRoT-30 b and CoRoT-31 b. Astronomy & Astrophysics (635), a122. EDP Sciences. doi: 10.1051/0004-6361/201732393. ISSN 0004-6361.

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Official URL: https://www.aanda.org/articles/aa/abs/2020/03/aa32393-17/aa32393-17.html


Aims. We report the discovery as well as the orbital and physical characterizations of two new transiting giant exoplanets, CoRoT-30 b and CoRoT-31 b, with the CoRoT space telescope. Methods. We analyzed two complementary data sets: photometric transit light curves measured by CoRoT, and radial velocity curves measured by the HARPS spectrometer. To derive the absolute masses and radii of the planets, we modeled the stars from available magnitudes and spectra. Results. We find that CoRoT-30 b is a warm Jupiter on a close-to-circular 9.06-day orbit around a G3V star with a semi-major axis of about 0.08 AU. It has a radius of 1.01 ± 0.08 RJ, a mass of 2.90 ± 0.22 MJ, and therefore a mean density of 3.45 ± 0.65 g cm−3. The hot Jupiter CoRoT-31 b is on a close-to-circular 4.63-day orbit around a G2 IV star with a semi-major axis of about 0.05 AU. It has a radius of 1.46 ± 0.30 RJ, a mass of 0.84 ± 0.34 MJ, and therefore a mean density of 0.33 ± 0.18 g cm−3. Conclusions. Neither system seems to support the claim that stars hosting planets are more depleted in lithium. The radii of both planets are close to that of Jupiter, but they differ in mass; CoRoT-30 b is ten times denser than CoRoT-31 b. The core of CoRoT-30 b would weigh between 15 and 75 Earth masses, whereas relatively weak constraints favor no core for CoRoT-31 b. In terms of evolution, the characteristics of CoRoT-31 b appear to be compatible with the high-eccentricity migration scenario, which is not the case for CoRoT-30 b. The angular momentum of CoRoT-31 b is currently too low for the planet to evolve toward synchronization of its orbital revolution with stellar rotation, and the planet will slowly spiral-in while its host star becomes a red giant. CoRoT-30 b is not synchronized either: it looses angular momentum owing to stellar winds and is expected reach steady state in about 2 Gyr. CoRoT-30 and 31, as a pair, are a truly remarkable example of diversity in systems with hot Jupiters.

Item URL in elib:https://elib.dlr.de/134880/
Document Type:Article
Title:Transiting exoplanets from the CoRoT space mission. XXIX. The hot Jupiters CoRoT-30 b and CoRoT-31 b
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Borde, P.Laboratoire d’Astrophysique de Bordeaux, Universit´e de Bordeaux, CNRS, B18N, all´ee Geoffroy Saint-Hilaire, F-33615 Pessac, FranceUNSPECIFIED
Diaz, R. F.Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina; CONICET - Universidad de Buenos Aires, Instituto de Astronomia y Fisica del Espacio (IAFE), Buenos Aires, ArgentinaUNSPECIFIED
Creevy, OObservatoire de la Côte d'Azur: Nice, Provence-Alpes-Côte d'Azur, FRhttps://orcid.org/0000-0003-1853-6631
Damiani, C.Institut d Astrophysique Spatiale, UMR 8617, CNRS - Universite de Paris-Sud - Universite Paris-Saclay - Bat. 121, 91405 Orsay, FranceUNSPECIFIED
Klagyivik, P.peter.klagyivik (at) dlr.deUNSPECIFIED
Wuchterl, GKuffner Observatory,Johann-Staud-Straße 10,1160 Vienna,AustriaUNSPECIFIED
Gandolfi, D.dipartimento di fisica, universiteat di torino, via p. giuria 1, 10125 torino, italy; oscar.barraganvil (at) edu.unito.it | landessternwarte koenigstuhl, zentrum fuer astronomie der universitaet heidelberg, koenigstuhl 12, 69117 heidelberg, germanyUNSPECIFIED
Fridlund, MLeiden Observatory, University of Leiden, PO Box 9513, 2300 RA,UNSPECIFIED
Bouchy, F.Observatoire de Genève, Sauverny, SwitzerlandUNSPECIFIED
Aigrain, S.Department of Physics, Denys Wilkinson Building Keble Road, Oxford, OX1 3RHUNSPECIFIED
Alonso, RInstituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife,UNSPECIFIED
Almenara, JAix Marseille Université, CNRS, LAM (LaboratoireUNSPECIFIED
Barros, S. C. C.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIED
Bonomo, AINAF – Osservatorio Astrofisico di Torino, via Osservatorio 20, I-UNSPECIFIED
Cabrera Perez, JuanJuan.Cabrera (at) dlr.dehttps://orcid.org/0000-0001-6653-5487
Csizmadia, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
Erikson, Aanders.erikson (at) dlr.deUNSPECIFIED
Ferraz Mello, SUniversidade de Sao PaoloUNSPECIFIED
Günther, EThüringer LandessternwarteUNSPECIFIED
Guillot, TObservatoire de la Côte d'AzurUNSPECIFIED
Grziwa, SRheinisches Institut für Umweltforschung an der Universität zuUNSPECIFIED
Hatzes, AThürigner LandessternwarteUNSPECIFIED
Mazeh, TUniversity of Tel AvivUNSPECIFIED
Ollivier, MIAS Université de ParisUNSPECIFIED
Parviainen, HSub-department of Astrophysics, Department of Physics, University of Oxford,Oxford,OX1 3RH,UKUNSPECIFIED
Patzold, MRheinisches Institut f ̈ur Umweltforschung an der Universit ̈at zuUNSPECIFIED
Rauer, H.nstitute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, GermanyUNSPECIFIED
Santerne, ALAM, MarseilleUNSPECIFIED
Date:25 March 2020
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:a122
Publisher:EDP Sciences
Keywords:planetary systems / stars: fundamental parameters / stars: individual: CoRoT-30 / stars: individual: CoRoT-31
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 PLATO (old), R - Projekt COROT Beteiligung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Cabrera Perez, Juan
Deposited On:03 Jun 2020 07:22
Last Modified:23 Jul 2022 13:45

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