Transiting exoplanets from the CoRoT space mission XXIII. CoRoT-21b: a doomed large Jupiter around a faint subgiant star


Autoria(s): Paetzold, M.; Endl, M.; Csizmadia, Sz.; Gandolfi, D.; Jorda, L.; Grziwa, S.; Carone, L.; Pasternacki, T.; Aigrain, S.; Almenara, J. M.; Alonso, R.; Auvergne, M.; Baglin, A.; Barge, P.; Bonomo, A. S.; Borde, P.; Bouchy, F.; Cabrera, J.; Cavarroc, C.; Cochran, W. B.; Deleuil, M.; Deeg, H. J.; Diaz, R.; Dvorak, R.; Erikson, A.; Ferraz-Mello, S.; Fridlund, M.; Gillon, M.; Guillot, T.; Hatzes, A.; Hebrard, G.; Leger, A.; Llebaria, A.; Lammer, H.; MacQueen, P. J.; Mazeh, T.; Moutou, C.; Ofir, A.; Ollivier, M.; Parviainen, H.; Queloz, D.; Rauer, H.; Rouan, D.; Santerne, A.; Schneider, J.; Tingley, B.; Weingrill, J.; Wuchterl, G.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

07/11/2013

07/11/2013

2012

Resumo

CoRoT-21, a F8IV star of magnitude V = 16 mag, was observed by the space telescope CoRoT during the Long Run 01 ( LRa01) in the first winter field (constellation Monoceros) from October 2007 to March 2008. Transits were discovered during the light curve processing. Radial velocity follow-up observations, however, were performed mainly by the 10-m Keck telescope in January 2010. The companion CoRoT-21b is a Jupiter-like planet of 2.26 +/- 0.33 Jupiter masses and 1.30 +/- 0.14 Jupiter radii in an circular orbit of semi-major axis 0.0417 +/- 0.0011 AU and an orbital period of 2.72474 +/- 0.00014 days. The planetary bulk density is ( 1.36 +/- 0.48) x 10(3) kg m(-3), very similar to the bulk density of Jupiter, and follows an M-1/3 - R relation like Jupiter. The F8IV star is a sub-giant star of 1.29 +/- 0.09 solar masses and 1.95 +/- 0.2 solar radii. The star and the planet exchange extreme tidal forces that will lead to orbital decay and extreme spin-up of the stellar rotation within 800 Myr if the stellar dissipation is Q(*)/k2(*) <= 107.

Spanish Ministry of Science and Innovation (MICINN) [ESP2007-65480-C02-02, AYA2010-20982-C02-02]

DLR [50OW0204, 50OW0603, 50QM1004]

STFC [ST/G002266]

French National Research Agency [ANR-08-JCJC-0102-01]

CNES

Belgian Science Policy Office

NASA [NNX09AB30G]

W. M. Keck Foundation

Identificador

ASTRONOMY & ASTROPHYSICS, LES ULIS, v. 545, n. 2, pp. 708-712, 2012

0004-6361

http://www.producao.usp.br/handle/BDPI/42757

10.1051/0004-6361/201118425

http://dx.doi.org/10.1051/0004-6361/201118425

Idioma(s)

eng

Publicador

EDP SCIENCES S A

LES ULIS

Relação

ASTRONOMY & ASTROPHYSICS

Direitos

restrictedAccess

Copyright EDP SCIENCES S A

Palavras-Chave #PLANETARY SYSTEMS #PLANET-STAR INTERACTIONS #IN EXTRASOLAR PLANETS #TIDAL EVOLUTION #HOT-JUPITER #GIANT PLANET #LIGHT CURVES #SEARCH #ORBIT #DWARF #SOLAR #METALLICITY #ASTRONOMY & ASTROPHYSICS
Tipo

article

original article

publishedVersion