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

Inseok Song·J. -P. Caillault·David Barrado y Navascués·John R. Stauffer
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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.

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Inseok Song, J. -P. Caillault, David Barrado y Navascués, John R. Stauffer. 2000-10-04. Ages of A-type Vega-like stars from uvby$β$ Photometry. https://doi.org/10.1086/318269

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