The NASA Keck/NIRSPEC Radial Velocity Search for Giant Exoplanets around M Dwarfs

Details The NASA Keck/NIRSPEC Radial Velocity Search for Giant Exoplanets around M Dwarfs The NASA Keck/NIRSPEC Radial Velocity Search for Giant Exoplanets around M Dwarfs

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...21115903d&link_type=abstract

American Astronomical Society, AAS Meeting #211, #159.03

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the rationale, first observations and preliminary results of our radial velocity search for exoplanets around M dwarfs. We have so far obtained 5.5 nights of Keck II NASA time to collect high-resolution (R 22000), near-infrared spectra (1.2 microns) using NIRSPEC. Our sample consists of 80 nearby (distance < 20 pc) late M dwarfs (spectral class from M6 through M9) that are not known to be binaries. Earlier observations by our group have demonstrated a radial velocity precision ranging from 100 m/s to 400 m/s for late-M dwarfs using NIRSPEC. Such accuracy should allow us to detect planets with masses between 2 - 8 MJ at 1 A.U. or masses between 0.7-2.8 MJ at 0.1 A.U.
The goal of this observational program is to obtain similar or better velocity precision in a larger sample. Spin offs of this program include the determination of physical parameters (metallicity, surface gravity and effective temperature), rotational broadening and space velocities for our targets.

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