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- W1574505554 abstract "A method is developed for interpreting eclipses observed at the frequencies of emission lines in binary systems containing WR components. The anisotropy of the selective-absorption coefficient in the WR envelope is taken into account. The spatial structure of the WR envelope can be investigated, even the outermost parts. From observed intensities of the lambda4686 He II emission line in the V444 Cyg system and the lambda4653 C II--C IV, N III emission feature in CV Ser, the distribution of the volume selective-absorption coefficient in the WR envelope is determined for specified velocity fields. The cases of accelerated, uniform, and retarded expansion are considered. The population of the 3D level of the He II ion in the inner layers of a WR envelope undisturbed by the companion star is described by the law n/sub 3//sub D/(r) approx. =3900 (r/sub 0//r)/sup 3/, where r/sub 0/=2.6 R/sub sun/. If r/r/sub 0/=3, n/sub 3//sub D/=150 cm/sup -3/. The ratio n/sub e//n/sub 3//sub D/approx. =4 x 10/sup 9/ in the WR envelope, depending little on the distance r. This method uniquely determines both the spatial structure and the velocity field of the WR envelope from an analysis of the intensities and profiles of emission linesmore » during selective atmospheric eclipses when the WR envelope occults the companion. (AIP)« less" @default.
- W1574505554 created "2016-06-24" @default.
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- W1574505554 date "1976-03-01" @default.
- W1574505554 modified "2023-09-28" @default.
- W1574505554 title "Interpretation of eclipses at emission-line frequencies in Wolf-Rayet binaries" @default.
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