Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..558a&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, May-June 1988, p. 558-570. In Russian.
Astronomy and Astrophysics
Astronomy
22
Ionization, Stellar Atmospheres, Wolf-Rayet Stars, Atmospheric Models, Atmospheric Temperature, Equilibrium Equations, Gas Mixtures, Helium
Scientific paper
Calculations of the ionization structure of WR atmospheres are made in terms of Beal's model (1944), taking into account the outward decrease of matter density. It is found that the simultaneous existence of zones with various stages of ionization is possible only in a very narrow interval for the effective core temperature, which is inconsistent with observations. A qualitative model for the WR atmosphere is proposed, consisting of several thousand clots (clouds) of matter with possible dimensions of 1-2 solar radii and with densities of the order of ten times that of intercloud density. This model allows for the simultaneous existence of different stages of ionization in a wide range of effective temperatures. Observational evidence for this model would be the discovery of fast variability (on a time scale of 10 h) of WR emission line profiles with an amplitude of several percent.
Antokhin Igor I.
Cherepashchuk Anatol M.
Kholtygin Alexander F.
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