Transiting exoplanets from the CoRoT space mission XXIII. CoRoT-21b: a doomed large Jupiter around a faint subgiant star
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
07/11/2013
07/11/2013
2012
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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 |
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 |