Keck HiRES Spectroscopy of Candidate Post T Tauri Stars

Details Keck HiRES Spectroscopy of Candidate Post T Tauri Stars Keck HiRES Spectroscopy of Candidate Post T Tauri Stars

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20921902b&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #219.02; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We use high-signal-to-noise (between 200-500), high resolution (R 45,000) KECK HIRES spectroscopy of 13 candidate post T Tauri stars in the field to derive basic physical parameters, lithium abundances and radial velocities. We utilize qualitative age information determined from Li abundances, chromospheric emission and kinematic UV plane positions to distinguish pre and post main sequence objects. Based on these criteria and H-R diagram position, we identify 5 probable post T Tauri stars. We also examine irregular variability using the HIPPARCOS photometry annex, and search for the presence of infrared excesses. We thank the South Carolina Space Grant Consortium for providing support for E.J.B. through the Graduate Student Research Fellowship and acknowledge support for this work by NSF grant AST 02-39518.

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