VLT transit and occultation photometry for the bloated planet CoRoT-1b

Astrophysics - Earth and Planetary Astrophysics; binaries: eclipsing; planetary systems; stars: individual: CoRoT-1; infrared: stars; techniques: radial velocities

Abstract :

[en] We present VLT eclipse photometry for the giant planet CoRoT-1b. We observed a transit in the R-band filter and an occultation in a narrow filter centered on 2.09 microns. Our analysis of this new photometry and published radial velocities, in combination with stellar-evolutionary modeling, leads to a planetary mass and radius of 1.07 (+0.13,-0.18) M_Jup and 1.45 (+0.07,-0.13) R_Jup, confirming the very low density previously deduced from CoRoT photometry. The large occultation depth that we measure at 2.09 microns (0.278 (+0.043,-0.066) %) is consistent with thermal emission and is better reproduced by an atmospheric model with no redistribution of the absorbed stellar flux to the night side of the planet.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image

Demory, B.-O.

Triaud, A.H.M.J.

Barman, T.

Hebb, L.

Montalban Iglesias, Josefa ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Evol. et stabilité des étoiles et des amas d'étoiles (ESEA)

Maxted, P.

Queloz, D.

Deleuil, M.

Magain, Pierre ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image

Language :

English

Title :

VLT transit and occultation photometry for the bloated planet CoRoT-1b

Publication date :

2009

Journal title :

Astronomy and Astrophysics

ISSN :

0004-6361

eISSN :

1432-0746

Publisher :

EDP Sciences, Les Ulis, France

Volume :

506

Pages :

359-367

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2009arXiv0905.4571G

Available on ORBi :

since 29 December 2010

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