Millimeter observations of the Be stars Psi Persei and Gamma Cassiopeiae

Details Millimeter observations of the Be stars Psi Persei and Gamma Cassiopeiae Millimeter observations of the Be stars Psi Persei and Gamma Cassiopeiae

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...213l..19w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 213, no. 1-2, April 1989, p. L19-L22. Research supported by the Niels Stensen

Astronomy and Astrophysics

Astronomy

9

B Stars, Millimeter Waves, Radio Astronomy, Stellar Spectra, Stellar Winds, Cassiopeia Constellation, Infrared Sources (Astronomy), Stellar Envelopes

Scientific paper

Observations of the Be stars Psi Per (B5 IIIe) and Gamma Cas (B0.5 IVe) at 1.1 mm with the James Clerk Maxwell Telescope. Psi Per was detected at 0.8 and 1.1 mm, while for Gamma Cas an upper limit at 1.1 mm is obtained. The mm observations are combined with existing UV, optical, IR, and radio data in order to investigate the density structure of the outer regions of the winds of Be stars. The observations indicate a steepening of the spectrum in the mm and cm range as compared to the slope of the spectrum found with IRAS, which is interpreted in terms of a steepening of the density distribution of the ionized circumstellar gas at large radii.

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