SIMBAD references

2008A&A...479..865L - Astronomy and Astrophysics, volume 479, 865-875 (2008/3-1)

Doppler search for exoplanet candidates and binary stars in a CoRoT field using a multi-fiber spectrograph. I. Global analysis and first results.

LOEILLET B., BOUCHY F., DELEUIL M., ROYER F., BOURET J.-C., MOUTOU C., BARGE P., DE LAVERNY P., PONT F., RECIO-BLANCO A. and SANTOS N.C.

Abstract (from CDS):

The discovery of the short-period giant exoplanet population, the so-called hot Jupiter population, and their link to brown dwarfs and low-mass stars challenges the conventional view of planet formation and evolution. We took advantage of the multi-fiber facilities GIRAFFE and UVES/FLAMES (VLT) to perform the first large radial velocity survey using a multi-fiber spectrograph to detect planetary, brown-dwarf candidates and binary stars. We observed 816 stars during 5 consecutive half-nights. These stars were selected within one of the exoplanet fields of the space mission CoRoT. We computed the radial velocities of these stars and showed that a systematic error floor of 30m/s was reached over 5 consecutive nights with the GIRAFFE instrument. Over the whole sample the Doppler measurements allowed us to identify a sample of 50 binaries, 9 active or blended binary stars, 5 unsolved cases, 14 exoplanets and brown-dwarf candidates. Further higher precision Doppler measurements are now necessary to confirm and better characterize these candidates. This study demonstrates the efficiency of a multi-fiber approach for large radial-velocity surveys in search for exoplanets as well as the follow-up of transiting exoplanet candidates. The spectroscopic characterization of the large stellar population is an interesting by-product of such missions as the CoRoT space mission.

Abstract Copyright:

Journal keyword(s): techniques: radial velocities - instrumentation: spectrographs - stars: binaries: spectroscopic - stars: low-mass, brown dwarfs - stars: planetary systems

VizieR on-line data: <Available at CDS (J/A+A/479/865): table3.dat table4.dat table5.dat>

Nomenclature: Tables 3, 4, 5: CoRoT NNNNNNNNN N=50+9+14.

Simbad objects: 85

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2020.07.12-15:58:57

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