The Spitzer search for the transits of HARPS low-mass planets - I. No transit for the super-Earth HD 40307b

[en] We used Spitzer and its IRAC camera to search for the transit of the super-Earth HD 40307b. The hypothesis that the planet transits could not be firmly discarded from our first photometric monitoring of a transit window because of the uncertainty coming from the modeling of the photometric baseline. To obtain a firm result, two more transit windows were observed and a global Bayesian analysis of the three IRAC time series and the HARPS radial velocities was performed. Unfortunately, the hypothesis that the planet transited during the observed phase window is firmly rejected, while the probability that the planet does transit but that the eclipse was missed by our observations is nearly negligible (0.26%).

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

Deming, D.

Demory, B *-O

Lovis, C.

Seager, S.

Mayor, M.

Pepe, F.

Queloz, D.

Segransan, D.

Udry, S.

Delmelle, S.

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

Language :

English

Title :

The Spitzer search for the transits of HARPS low-mass planets - I. No transit for the super-Earth HD 40307b

Publication date :

01 July 2010

Journal title :

Astronomy and Astrophysics

ISSN :

0004-6361

eISSN :

1432-0746

Publisher :

EDP Sciences, Les Ulis, France

Volume :

518

Issue :

A25

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2010arXiv1002.4707G

Available on ORBi :

since 04 June 2010

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