Computed He II spectra for Wolf-Rayet stars

Details Computed He II spectra for Wolf-Rayet stars Computed He II spectra for Wolf-Rayet stars

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...145..443h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 145, no. 2, April 1985, p. 443-448.

Astronomy and Astrophysics

Astrophysics

20

Helium, Stellar Atmospheres, Stellar Mass Ejection, Stellar Models, Stellar Spectra, Wolf-Rayet Stars, Atmospheric Models, Emission Spectra, Gas Expansion, Radiative Transfer, Spectral Line Width

Scientific paper

Synthetic spectra of spherically symmetric, expanding stellar atmospheres of pure helium are calculated in non-LTE for a given atmospheric structure. The radiation transfer is solved in the "comoving frame", and consistency with the multilevel atom rate equations is achieved iteratively by an "equivalent two level atom approach". A small grid of models is calculated. He II emission lines as typically observed in WR stars are obtained, if the effective temperature of the star lies above 35kK and the mass loss rate exceeds 10-5M_sun;/yr.

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