Transiting exoplanets from the CoRoT space mission VIII. CoRoT-7b: the first Super-Earth with measured radius

摘要: We report the discovery of very shallow (DF/F = 3.4 10-4), periodic dips in light curve an active V 11.7 G9V star observed by CoRoT satellite, which we interpret as due to presence a transiting companion. describe 3-colour data and complementary ground-based observations that support planetary nature Methods. use color information, good angular resolution photometric in- out- transit, adaptive optics imaging, near-infrared spectroscopy preliminary results from Radial Velocity measurements, test diluted eclipsing binary scenarios. The parameters host are derived optical spectra, were then combined with derive examine carefully all conceivable cases false positives, tests performed hypothesis. Blends separation larger than 0.40 arcsec or triple systems almost excluded 8 10-4 risk left. conclude that, far have been exhaustive, discovered companion, named CoRoT-7b, for period 0.853 59 +/- 3 10-5 day radius Rp 1.68 0.09 REarth. Analysis radial velocity yields upper limit 21 MEarth companion mass, supporting finding. CoRoT-7b is likely first Super-Earth measured radius.