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

M. Gillon, B. O. Demory, A. H.M.J. Triaud, T. Barman, L. Hebb, J. Montalbán, P. F.L. Maxted, D. Queloz, M. Deleuil, P. Magain

Research output: Contribution to journalReview article

65 Scopus citations

Abstract

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 μm. Our analysis of this new photometry and published radial velocities, in combination with stellar-evolutionary modeling, leads to a planetary mass and radius of 1.07-0.18+0.13 M Jup and 1.45-0.13+0.07 RJup, confirming the very low density previously deduced from CoRoT photometry. The large occultation depth that we measure at 2.09 μm (0.278 -0.066+0.043%) 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.

Original languageEnglish (US)
Pages (from-to)359-367
Number of pages9
JournalAstronomy and astrophysics
Volume506
Issue number1
DOIs
StatePublished - Dec 1 2009
Externally publishedYes

Keywords

  • Binaries: Eclipsing
  • Infrared: Stars
  • Planetary systems
  • Stars: Individual: CoRoT-1
  • Techniques: Photometric
  • Techniques: Radial velocities

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Gillon, M., Demory, B. O., Triaud, A. H. M. J., Barman, T., Hebb, L., Montalbán, J., Maxted, P. F. L., Queloz, D., Deleuil, M., & Magain, P. (2009). VLT transit and occultation photometry for the bloated planet CoRoT-1b. Astronomy and astrophysics, 506(1), 359-367. https://doi.org/10.1051/0004-6361/200912231