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Fast-rotating nearby solar-type stars. I. Spectral classification, vsini, Li abundances and X-ray luminosities.
CUTISPOTO G.; PASTORI L.; PASQUINI L.; DE MEDEIROS J.R.; TAGLIAFERRI G.; ANDERSEN J.
Abstract (from CDS): We present the results of high-resolution spectroscopic and high-precision photometric observations on a sample of 129 late-F and G-type nearby stars selected on the basis of their large rotational velocity. Using also data from the Hipparcos satellite, CORAVEL and from the ROSAT satellite database, we infer spectral types, compute radial velocities, vsini, Li abundances and X-ray luminosities and investigate the single or binary nature of the sample stars. Such a careful analysis of our sample shows a large fraction of binaries (≃62%) and of young single disk stars. In particular, at least 9 stars can be considered bona-fide PMS or ZAMS objects, and 30 stars are identified as SBs for the first time. Information on the presence of Ca IIK emission and on optical variability is given for some of the stars of the sample.
Abstract Copyright: European Southern Observatory (ESO) 2002
Journal keyword(s): stars: abundances - stars: activity - stars: fundamental parameters - stars: variables: general - X-rays: stars
Simbad comments: in ref list SKUMANICH ApJ.171.565 instead of ApJ.171.56
VizieR on-line data: <Available at CDS (J/A+A/384/491): table1.dat table3.dat table4.dat table5.dat notes.dat + figures 1 to 8>
Simbad objects (135)
Link(s): Full paper ADS services