Abstract
view Abstract Citations (11) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Neutral helium emission in Wolf-Rayet envelopes. Oegerle, W. R. ; van Blerkom, D. Abstract 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. Publication: The Astrophysical Journal Pub Date: May 1976 DOI: 10.1086/154365 Bibcode: 1976ApJ...206..150O Keywords: 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; Astrophysics full text sources ADS |
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