Astronomy and Astrophysics – Astronomy
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.199..591d&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 199, May 1982, p. 591-600.
Astronomy and Astrophysics
Astronomy
11
B Stars, Spectral Line Width, Stellar Mass Ejection, Stellar Spectra, Ultraviolet Astronomy, Carbon, Iron, Iue, Resonance Lines, Silicon, Ultraviolet Spectra
Scientific paper
The present investigation considers the interpretation of UV line profiles of some Be stars obtained with the International Ultraviolet Explorer (IUE) spacecraft, giving particular attention to Pi Aqr. The mass-loss rates are estimated using the Sobolev approximation and assuming that the observed asymmetric UV lines are formed in an expanding envelope above and below the considered denser equatorial region. A mass-loss rate of 2.4 x 10 to the -9th solar mass per year is derived for Pi Aqr. The derived value for Pi Aqr is comparable to that deduced for Gamma Cas by Hensberge et al. (1980) and to that deduced for the BOV star Tau Sco by Lamers and Rogerson (1978).
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