Laser action in stellar envelopes

Details Laser action in stellar envelopes Laser action in stellar envelopes

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..45...87v&link_type=abstract

Astrophysics and Space Science, vol. 45, Nov. 1976, p. 87-97. Research supported by the National Research Council of Canada.

Physics

Plasma Physics

11

Hot Stars, Interstellar Masers, Stellar Envelopes, Stellar Mass Ejection, Stellar Models, Electron Energy, Hydroxyl Emission, Plasma Density, Plasma Physics, Plasma Temperature, Population Inversion, Stellar Atmospheres, Stellar Spectra, Thermodynamic Equilibrium, Wolf-Rayet Stars

Scientific paper

It is shown that in high-temperature stars in which high-speed mass loss is occurring, the rapidly recombining plasma in the stellar envelope can act as an amplifying medium. Model calculations for laser action in the 4686-A He II line, using the collisional-radiative model, are presented. Menzel's (1970) hypothesis of laser action in distended stellar atmospheres is shown to be fully substantiated. The relevance of these results in resolving the problem of intensity anomalies in the spectra of Wolf-Rayet stars is pointed out.

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