Neutral helium emission in Wolf-Rayet envelopes

Details Neutral helium emission in Wolf-Rayet envelopes Neutral helium emission in Wolf-Rayet envelopes

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...206..150o&link_type=abstract

Astrophysical Journal, vol. 206, May 15, 1976, pt. 1, p. 150-155.

Mathematics

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11

Emission Spectra, Helium Atoms, Hot Stars, Radiative Recombination, Stellar Envelopes, Wolf-Rayet Stars, Abundance, Atomic Excitations, Collision Rates, Electron Energy, Equilibrium Equations, Ion Production Rates, Photoionization

Scientific paper

A non-LTE analysis of neutral helium emission is performed for Wolf-Rayet stars. The statistical equilibrium equations are derived and simplified by using the escape-probability method. Using a thirty-six-bound-level model helium atom, the relative intensities of allowed transitions are calculated for various helium abundances at electron temperatures of 10,000 and 20,000 K and are compared with observations of MR 119.

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