An Infrared Precision Radial Velocity Spectrograph for Gemini

Details An Infrared Precision Radial Velocity Spectrograph for Gemini An Infrared Precision Radial Velocity Spectrograph for Gemini

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20919104r&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #191.04; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We discuss the scientific motivation and design of the Precision Radial Velocity Spectrograph (PRVS), a potential next generation near-infrared instrument for the Gemini Observatory. PRVS is a fiber-fed, white-pupil, cooled echelle (R=70,000) spectrograph working in the Y, J and H bands. Using the simultaneous arc-line calibration method, long-term instrumental radial velocity precisions of less than 1 m/s can be achieved. In effect, PRVS is an infrared version of the very successful optical precision radial velocity spectrograph, HARPS, but for an 8 m telescope. Through modelling and simululation of the fundamental Doppler information in the spectra of stars and the effects of telluric contamination, we conclude that the best place to search for earth-mass planets in the habitable zone using their radial velocity signatures is around midto late-M dwarf stars at wavelengths of 1-2 microns. This conclusion is also supported by experimental observations made with a PRVS "pathfinder" spectrograph. Pathfinder is the subject of a separate presentation by Larry Ramsey at this session. Mock surveys show that PRVS can survey several hundred stars for planets in the range 1-10 earth-mass over a period of five years and provide an important test of planet
formation models.

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