Precise Radial Velocities in the IR

Details Precise Radial Velocities in the IR Precise Radial Velocities in the IR

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.2011f&link_type=abstract

American Astronomical Society, ESS meeting #2, #20.11

Astronomy and Astrophysics

Astronomy

Scientific paper

After several decades of low-precision work, precise Radial Velocities (RV) are now expanding into the infra red (IR) domain (e.g. Figueira et al 2010, A&A 511A, 55; Bean et al. 2010, ApJ 713, 410). Exploring the infrared is extremely advantageous not only because the M-dwarfs emission peak in the IR but also because the effect of stellar spots on RV are reduced, making IR RV a powerful diagnosis tool.
Here we present our current effort to characterize the IR curve of two planet-host stars whose candidate planets were detected with optical RV: an active k-dwarf star and a giant star. The results will confirm (or not) the presence of planets orbiting these two interesting stars. In particular, they will shed new light into the frequency of planets around higher mass (giant) stars, or even their existence at all. We also describe a campaign that was used to evaluate the phenomena that dominate the precision of our calibrator, atmospheric lines.

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