On hot star winds. I - Radiation-driven winds. II - Energy transport Corona-like temperature enhancements

Details On hot star winds. I - Radiation-driven winds. II - Energy transport Corona-like temperature enhancements On hot star winds. I - Radiation-driven winds. II - Energy transport Corona-like temperature enhancements

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...106..345l&link_type=abstract

Astronomy and Astrophysics, vol. 106, no. 2, Feb. 1982, p. 345-361.

Astronomy and Astrophysics

Astrophysics

6

Energy Transfer, Hot Stars, Stellar Mass Ejection, Stellar Models, Stellar Temperature, Stellar Winds, Radiative Transfer, Stellar Coronas, Velocity Distribution

Scientific paper

In an investigation of hot star winds, it is shown that a refined description of the physics of the inner and outer layers leads to different conclusions from those of Castor et al. (1975) concerning velocity profiles, terminal velocities, and mass loss rates. A radiation driven stellar wind is shown to be a complicated structure requiring the occurrence of very particular conditions, and models are constructed to demonstrate that an additional heat source may be necessary, because the observed terminal velocities and mass loss rates can probably not be explained by only a radiative force produced by absorption in the lines. The heat source would enhance the temperature to very high values so that the thermal pressure produces dynamical effects as in Parker's thermally driven winds. The sensitivity of the models to the assumptions and to variations of the parameters is analyzed to determine the reliability of the model.

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