Ages of main-sequence stars (Lachaume+, 1999)

Details Ages of main-sequence stars (Lachaume+, 1999) Ages of main-sequence stars (Lachaume+, 1999)

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..33480897l&link_type=abstract

VizieR On-line Data Catalog: J/A+A/348/897. Originally published in: 1999A&A...348..897L

Computer Science

Stars: Dwarfs, Stars: Ages, Rotational Velocities, Space Velocities, Abundances: [Fe/H]

Scientific paper

We have determined the age of a sample of nearby main-sequence stars with spectral types B9-K9. We have derived the stellar ages from five different age estimators: the location in the HR diagram compared to theoretical isochrones, the rotational velocity, the strength of chromospheric calcium emission lines, the stellar metallicity, and their space velocity. New calibrations consistent with recent theoretical isochrones are provided for the last four indicators. For hot stars, isochrones are the best indicator, while stellar rotation is best for cool stars. However, many stars require in fact a combination of different methods to properly bracket their actual age. We also discuss the uncertainties involved, in particular those in using isochrones, and we find that these uncertainties are often underestimated in the literature.
(6 data files).

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