Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...106...70d&link_type=abstract
Astronomy and Astrophysics, vol. 106, no. 1, Feb. 1982, p. 70-78. Deutsche Forschungsgemeinschaft
Astronomy and Astrophysics
Astrophysics
2
Gas Ionization, Radial Velocity, Resonance Lines, Stellar Envelopes, Stellar Winds, Ultraviolet Spectroscopy, Velocity Distribution, Cygnus Constellation, Early Stars, Electron Energy, Expansion, Stellar Atmospheres, Wolf-Rayet Stars
Scientific paper
It is shown that the envelope line profiles formed by the scattering of stellar continuum flux in expanding atmospheres of luminous, early-type and Wolf-Rayet stars are sensitive to the variation of (1) the optical depth in the line, and (2) the velocity gradient of the stellar wind, as a function of radial distance from the star. A theoretical profile sample is presented, and UV envelope line profiles observed in the spectra of stars with rapid mass loss via stellar wind are compared with theoretically predicted profiles. A discussion is also given concerning inferences from UV spectroscopic observations of the O7f supergiant UW CMa, the interacting early-type contact binary SV Cen, and the Wolf-Rayet star HD 192163, in light of the expanding envelope models.
Drechsel Horst
Rahe Juergen
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