Radial Velocity Survey of T Tauri Stars in Taurus-Auriga

Details Radial Velocity Survey of T Tauri Stars in Taurus-Auriga Radial Velocity Survey of T Tauri Stars in Taurus-Auriga

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21340201c&link_type=abstract

American Astronomical Society, AAS Meeting #213, #402.01; Bulletin of the American Astronomical Society, Vol. 41, p.191

Astronomy and Astrophysics

Astronomy

Scientific paper

Is the frequency of giant planet companions to young stars similar to that seen around old stars? Is the "brown dwarf desert" a product of how low-mass companion objects form, or of how they evolve? Some models indicate that both giant planets and brown dwarfs should be common at young ages within 3 AU of a primary star, but migration induced by massive disks drive brown dwarfs into the parent stars, leaving behind proportionally more giant planets. Our radial velocity survey of young stars will provide a census of the young giant planet and brown dwarf population in Taurus-Auriga. In this poster we present our progress in quantifying how spurious radial velocity signatures are caused by stellar activity and in developing models to help distinguish between companion induced and spot induced radial velocity variations. Early results stress the importance of complementary observations in both visible light and NIR. We present our technique to determine radial velocities by fitting telluric features and model stellar features to our observed spectra. Finally, we discuss ongoing observations at McDonald Observatory, KPNO, and the IRTF, and several new exoplanet host candidates.

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