The Spitzer search for the transits of HARPS low-mass planets I. No transit for the super-Earth HD 40307b
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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%).
Date issued
2010-08Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary SciencesJournal
Astronomy and Astrophysics
Publisher
EDP Sciences
Citation
Gillon, M., D. Deming, B.-O. Demory, C. Lovis, S. Seager, M. Mayor, F. Pepe, et al. “ The Spitzer Search for the Transits of HARPS Low-Mass Planets .” A&A 518 (July 2010): A25.
Version: Final published version
ISSN
0004-6361
1432-0746