The Keck/NIRSPEC Search for Giant Exoplanets around Late M-dwarfs

Details The Keck/NIRSPEC Search for Giant Exoplanets around Late M-dwarfs The Keck/NIRSPEC Search for Giant Exoplanets around Late M-dwarfs

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.2209d&link_type=abstract

American Astronomical Society, DPS meeting #39, #22.09; Bulletin of the American Astronomical Society, Vol. 39, p.451

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. So far we have obtained 2.5 nights (1.5 already done, 2 half nights pending) of Keck NASA time to collect high-resolution near-infrared spectra using NIRSPEC on the KECK II telescope. Our sample consists of 80 nearby (distance ? pc) late M dwarfs (spectral class from M6 through M9) that are not known to be binaries.
Earlier observations by our group demonstrated a radial velocity precision ranging from 100 m/s to 400 m/s for late-M dwarfs. Such an accuracy should allow us to detect planets with masses between 2 - 8 MJ at 1 A.U. or 0.7-2.8 MJ at 0.1 A.U, respectively. The goal of this new observational program is to obtain similar or better velocity precision in a larger sample. Spin offs of this program will include the determination of rotational broadening and space velocities for our targets.

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