Ages of A-type Vega-like stars from uvby$β$ Photometry

Details Ages of A-type Vega-like stars from uvby$β$ Photometry Ages of A-type Vega-like stars from uvby$β$ Photometry

2000-10-04

arxiv.org/abs/astro-ph/0010102v1

Astronomy and Astrophysics

Astrophysics

4pages text, 3 tables, 3 figures, Accepted in ApJ

Scientific paper

10.1086/318269

We have estimated the ages of a sample of A-type Vega-like stars by using Str\"{o}mgren \emph{uvby$\beta} photometric data and theoretical evolutionary tracks. We find that 13 percent of these A stars have been reported as Vega-like stars in the literature and that the ages of this subset run the gamut from very young (50~Myr) to old (1~Gyr), with no obvious age difference compared to those of field A stars. We clearly show that the fractional IR luminosity decreases with the ages of Vega-like stars.

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