The energy balance and mass loss of stellar coronae

Details The energy balance and mass loss of stellar coronae The energy balance and mass loss of stellar coronae

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....40..355h&link_type=abstract

Astronomy and Astrophysics, vol. 40, no. 4, May 1975, p. 355-364. Research sponsored by the Deutsche Forschungsgemeinschaft.

Computer Science

Sound

106

Coronas, Mass Transfer, Sound Waves, Stellar Atmospheres, B Stars, Energy Dissipation, Hot Stars, O Stars, Stellar Mass, Stellar Winds, Supergiant Stars, Wolf-Rayet Stars

Scientific paper

The question is considered of whether radiation-driven sound waves could explain the mass loss of OB supergiants and Wolf-Rayet stars through the mechanism of a stellar wind produced by a hot corona. Simple expressions are obtained for the energy-loss rate from a corona due to mass loss, radiation, and thermal conduction. It is found that a corona with a given base pressure will have a temperature at which energy losses are a minimum. The calculations are applied to zeta Orionis (O-type supergiant), an average Wolf-Rayet star, alpha Cygni (A-type supergiant), and the sun. It is found that the mass loss from alpha Cygni can be explained by a stellar wind from a corona heated by radiation-driven sound waves.

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