An Ultraviolet-Selected Sample of Young Stars

Details An Ultraviolet-Selected Sample of Young Stars An Ultraviolet-Selected Sample of Young Stars

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341408f&link_type=abstract

American Astronomical Society, AAS Meeting #213, #414.08; Bulletin of the American Astronomical Society, Vol. 41, p.225

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Scientific paper

While we know of large populations of young stars having ages younger than 3 Myr and older than 100 Myr, traditional search methods are relatively insensitive to stars of intermediate age. This bias impairs studies of key stages of stellar evolution and of the star formation history of individual regions. We have used GALEX ultraviolet imaging of the nearby (140 pc) Taurus and Upper Scorpius star forming regions to search for 3-100 Myr old stars. Our method selects ultraviolet emission in excess of that expected from a main-sequence photosphere. We identify objects with such excesses by combining the GALEX photometry with 2MASS infrared photometry. We present these data as well as follow-up optical spectroscopy of a representative sample of objects that confirms or rejects their identification as young stars. Several other types of UV bright objects are serendipitously discovered via our methods.

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