Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..430..158r&link_type=abstract
Pathways Towards Habitable Planets, proceedings of a workshop held 14 to 18 September 2009 in Barcelona, Spain. Edited by Vincen
Astronomy and Astrophysics
Astronomy
Scientific paper
In February 2009, the transit detection by the CoRoT satellite of CoRoT-7b, a planet as small as R = 1.7 REarth; and closely orbiting a solar-type star, was announced at the CoRoT symposium in Paris. Here we present the arguments, largely based on follow-up observations from the ground, that leave practically no doubt on this detection and we give the last evaluation of the planet parameters. In addition, we show how the most recent results of radial velocity measurements with HARPS fully confirm the discovery and give now a firm evaluation of the mass of the planet, 4.8 MEarth, and thus of its density which is equal to that of Earth, suggesting a similar composition dominated by silicates. Lastly, it is shown that a second planet, of only twice the mass of CoRoT-7b, is found on a slightly larger orbit, but still extremely close to the star. The discovery of the CoRoT-7b system is obviously an important milestone on the pathway to habitable planets.
Barge Pierre
Bouchy Florent
CoRoT Exoplanet Science Team
Fridlund Malcolm
Hatzes Artie
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