Extending the Search for Other Earths with Precision Radial Velocity Measurements in the Near-IR

Details Extending the Search for Other Earths with Precision Radial Velocity Measurements in the Near-IR Extending the Search for Other Earths with Precision Radial Velocity Measurements in the Near-IR

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21534804r&link_type=abstract

American Astronomical Society, AAS Meeting #215, #348.04; Bulletin of the American Astronomical Society, Vol. 42, p.530

Astronomy and Astrophysics

Astronomy

Scientific paper

M dwarfs, the most common type of star in the Solar neighborhood, exhibit higher Doppler radial velocities when orbited by a terrestrial mass planet than F, G, K dwarfs since they have lower mass. Unfortunately, late M dwarfs have low optical luminosities, emitting most of their flux in the near-infrared (NIR). The ExoPlanet Task Force has recommended that NIR RV instruments be made a high priority. We have been developing such an instrument at Penn State and preliminary results for our "pathfinder" instrument have been published in PASP (120:870, 2008, p. 887). These studies have been extended with a significant upgrade which includes better optimized gratings and a substantially improved calibration system. We present recent results from Y- and J-band observations in the near-Infrared using the Earth's rotational velocity with respect to the Sun as a test signal and a Hawaii-1K array. We use these results, along with a high resolution spectrum of Barnard's Star (M4) at red limit of the CCD to estimate the achievable precision when we move the pathfinder to the Hobby-Eberly telescope in the Spring of 2010.

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