Are Wolf-Rayet Stellar Winds Driven by Radiation Forces?

Details Are Wolf-Rayet Stellar Winds Driven by Radiation Forces? Are Wolf-Rayet Stellar Winds Driven by Radiation Forces?

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...454..404p&link_type=abstract

Astrophysical Journal v.454, p.404

Astronomy and Astrophysics

Astronomy

10

Radiative Transfer, Stars: Atmospheres, Stars: Mass Loss, Stars: Wolf-Rayet

Scientific paper

We derive a formal condition for an existence of a critical point in optically thick flows. Using recent synthetic quantitative spectroscopy results and recent OPAL opacities we find that Wolf-Rayet stars (of the WRC type and part of the WRN type) satisfy this condition, and we account for the observed mass-loss rates and inferred critical temperatures.
We also show that there is no obvious momentum problem well below the photosphere. A less quantitative discussion is given for critical points with low to moderate optical depth, where non-LTE effects are conjectured to be crucial.

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