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A survey for infrared excesses among high galactic latitude SAO stars
Stencel, Robert E.; Backman, Dana E.
AA(Colorado, University, Boulder), AB(NASA, Ames Research Center, Moffett Field, CA)
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 75, March 1991, p. 905-924. Research supported by University of Colorado. (ApJS Homepage)
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NASA/STI Keywords:
Infrared Astronomy, Main Sequence Stars, Stellar Envelopes, Stellar Spectra, Astronomical Catalogs, Extrasolar Planets, Far Infrared Radiation, Infrared Astronomy Satellite, Milky Way Galaxy, Planetary Evolution
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This project involves extending the previous analysis of infrared excesses among a volume-limited sample of 134 nearby A-K main-sequence stars to a magnitude-limited sample of stars, culled from the SAO Catalog, with excesses determined from the IRAS Point Source Catalog flux density ratios. This new sample includes 5706 B-M type stars, 379 of which have infrared excesses. The objective involved use of a statistically complete survey of objects in a standard catalog in order to assess the frequency with which different physical processes can affect the infrared output of stars. These processes include, but are not limited to, orbiting cold particle clouds and the onset of rapid mass loss. It is concluded that cold disks are consistent with the infrared excesses found among A-G dwarfs and G-K giants in the sample.

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