Rotation and kinematics of the premain-sequence stars in Taurus-Auriga with CA II emission

Abstract

view Abstract Citations (53) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Rotation and Kinematics of the Pre-Main-Sequence Stars in Taurus-Auriga with CA II Emission Hartmann, Lee W. ; Soderblom, David R. ; Stauffer, John R. Abstract The authors report radial velocities and v sin i values for the stars in the Taurus-Auriga region that were found to have strong Ca II H and K emission by Herbig, Vrba, and Rydgren (HVR). Most of the velocities are determined to better than 2 km s-1 precision. The authors find the kinematic properties of the Ca II emission stars with strong Li to be indistinguishable from conventional T Tauris in Taurus-Auriga, contrary to HVR. These Li-rich stars also rotate like T Tauris. Most of the stars that lack Li are probable or possible members of the Hyades, in the foreground, and are among the brightest and most active stars in that cluster for their spectral types. The authors suggest, following Jones and Herbig, that the apparent absence of low-mass stars older than 10 Myr in Taurus-Auriga is real, and is due to the finite lifetime of the cloud. Publication: The Astronomical Journal Pub Date: April 1987 DOI: 10.1086/114376 Bibcode: 1987AJ.....93..907H Keywords: Calcium; Pre-Main Sequence Stars; Radial Velocity; Stellar Motions; Stellar Rotation; T Tauri Stars; Abundance; Late Stars; Line Spectra; Star Formation; Stellar Mass; Astrophysics; STARS: PRE-MAIN-SEQUENCE full text sources ADS | data products SIMBAD (22)