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 articlepeer-review

70 Scopus citations


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
Issue number1
StatePublished - 2009


  • 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


Dive into the research topics of 'VLT transit and occultation photometry for the bloated planet CoRoT-1b'. Together they form a unique fingerprint.

Cite this