Inseok Song et al. 2002 The Astronomical Journal 124 514 doi:10.1086/341164
Inseok Song1,2, A. J. Weinberger1,3, E. E. Becklin1, B. Zuckerman1 and C. Chen1
Show affiliationsWe carried out a search for M-type Vega-like stars by correlating the IRAS Faint Source Catalog with Hipparcos-selected M-type stars. Three stars with apparent IRAS 25 μm excess emission are shown instead to be non–IR-excess stars from ground-based 11.7 and 17.9 μm photometry. Two stars previously suggested to have Vega-like mid-IR excess are also shown to be nonexcess stars. These results imply that other suggested mid–IR-excess stars in the literature may also be false excess stars. Detection threshold bias is apparently responsible for these bogus IR excesses. Sixty micron excess emission from a previously known M-type Vega-like star (GJ 803) is identified again.
circumstellar matter; planetary systems: protoplanetary disks; stars: individual (GJ 803); stars: late-type
Issue 1 (2002 July)
Received 2001 August 10, accepted for publication 2002 April 8
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