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Thermal instability in the wind of Wolf-Rayet stars

Published online by Cambridge University Press:  25 May 2016

Denise R. Gonçalves ,
Vera Jatenco-Pereira  and
Reuven Opher
Denise R. Gonçalves
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
Vera Jatenco-Pereira
Affiliation:
Universidade de São Paulo, Instituto Astronômico e Geofísico, Av. Miguel Stéfano, 4200, 04301-904, São Paulo, Brazil
Reuven Opher
Affiliation:
Universidade de São Paulo, Instituto Astronômico e Geofísico, Av. Miguel Stéfano, 4200, 04301-904, São Paulo, Brazil

Abstract

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In this study, we investigate the formation of clumps at the base of the wind of early-type stars via thermal instability in the presence of Alfvén wave heating. As a result we show the existence of two stable equilibrium regions, one at high temperature, the diffuse medium, and another at low temperature, the clumps. We show that the two stable equilibrium regions can coexist over a narrow range of pressures describing the diffuse medium and the clumps.

Type
Part 2. Models for single star evolution of massive stars: wind + atmosphere + interior
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 238 - 239
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

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