Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2010-12-22
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
Contribution to Proceedings of Cool Stars 16 Workshop
Scientific paper
With an emphasis in detecting Earth-like planets set forth by the 2010 Decadal Survey and in searching for planets around M dwarfs set forth by the 2008 Exoplanet Task Force, radial velocity surveys with infrared echelle spectrometers will have a significant impact on future exoplanet studies. Here, we present the results of an infrared radial velocity survey of a sample of 14 late-M dwarfs with the NIRSPEC echelle spectrometer on the Keck II telescope. Using telluric lines for wavelength calibration, we are able to achieve measurement precisions of 150-300 m/s over a year-long timeframe. While we require more RV epochs to determine whether most of our stars have planetary-mass companions, we have placed upper limits of 5-10 MJ on the masses of planets around a sub-set of our sample. We have also determined the rotational velocities for all the stars in the sample and offer our multi-order, high-resolution spectra over 2.0 to 2.4 micron to the modeling community to better understand the atmospheres of late-M dwarfs.
Bailey Jeremy
Barman Travis
Tanner Alan
White Russel
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