IRAS observations of Be stars. II - Far-IR characteristics and mass loss rates

Details IRAS observations of Be stars. II - Far-IR characteristics and mass loss rates IRAS observations of Be stars. II - Far-IR characteristics and mass loss rates

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...185..206w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 185, no. 1-2, Oct. 1987, p. 206-224. ZWO-supported research.

Astronomy and Astrophysics

Astronomy

183

B Stars, Infrared Spectra, Spaceborne Astronomy, Stellar Envelopes, Stellar Mass Ejection, Stellar Spectrophotometry, Far Infrared Radiation, Infrared Astronomy Satellite, Spectral Energy Distribution

Scientific paper

Observations of bright Be stars detected at 12, 25, and 60 microns by the IRAS are discussed. Results show the presence of fully ionized circumstellar material, and provide no indication of dust. The rates of mass loss from the IR in the circumstellar disk are found to be much higher than the rates derived from asymmetric UV resonance lines. In addition to radiation pressure, a Be mechanism (possibly related to rotation and nonradial pulsations) may be an effective driving force. The results suggest that very luminous stars cannot form disks due to the high radiation pressure that dominates the winds, and that mass loss due to the Be mechanism is negligible.

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