First large radial velocity survey for exoplanets and low-mass stars with a multifiber spectrograph

Details First large radial velocity survey for exoplanets and low-mass stars with a multifiber spectrograph First large radial velocity survey for exoplanets and low-mass stars with a multifiber spectrograph

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..413l&link_type=abstract

SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.

Astronomy and Astrophysics

Astrophysics

Scientific paper

The fascinating discovery of the short-period exoplanet population challenges the conventional view of planet formation and evolution. With only 14 planets among this population well-characterized so far with measured mass and radius, the sample still remains too limited to deeply investigate their nature and origin. We took advantage of the multifiber facility FLAMES (VLT) to perform the first large radial velocity survey aiming at detecting and characterizing a large sample of this population. We observed 774 stars selected within one of the exoplanet CoRoT field. The Doppler measurements allowed us to identify new hot-Jupiter and low-mass star candidates and a sample of binaries. Further higher precision Doppler measurements are now necessary to confirm and better characterize these candidates. Besides this demonstrates the efficiency of such a multifibers approach for large radial velocity surveys. In addition, combined to CoRoT observations these new detections will result in a significant breakthrough in the exoplanets mass function especially toward the low-mass population and in their link with brown dwarfs.

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