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

Abstract

We have estimated the ages of a sample of A-type Vega-like stars by using Strömgren \emph{uvby$β} 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.

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

References in corpus (3)

• The Age of Beta Pic
• Keck Spectra of Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Boundary in the Alpha Persei Open Cluster
• Ages of late spectral type Vega-like stars

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