Departures from LTE populations versus anomalous abundances: The effects of heating

Details Departures from LTE populations versus anomalous abundances: The effects of heating Departures from LTE populations versus anomalous abundances: The effects of heating

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985nascp2358..148u&link_type=abstract

In its The Origin of Nonradiative Heating/Momentum in Hot Stars p 148-158 (SEE N85-17755 08-88)

Physics

Electron Energy, Line Spectra, Stellar Atmospheres, Stellar Spectra, Temperature Effects, Wolf-Rayet Stars, Abundance, Atoms, Equilibrium Equations, Helium, Hydrogen, Models, Particle Collisions, Radiative Heat Transfer

Scientific paper

The deposit of nonradiative heat and momentum in the mantle of a hot star affects the interpretation of the stellar spectrum in two ways. First, a superheated and moving plasma should be considered when doing the analysis, and second, a model atom which is appropriate for the physical state of the line forming regions. Some examples are presented for H and He showing how the changes in the electron temperature affect the solution of the equations of statistical equilibrium. The observed spectra of the Wolf-Rayet stars HD 191765, HD 192103, and HD 192163 are compatible with a normal H/He abundance ratio.

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