Instability Caused by a Multicomponent Nature of Radiatively-driven Stellar Winds

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Authors

KUBÁT Jiří KRTIČKA Jiří

Year of publication 2003
Type Article in Proceedings
Conference Asteroseismology Across the HR Diagram
MU Faculty or unit

Faculty of Science

Citation
Field Astronomy and astrophysics
Keywords stars: mass-loss; stars:early-type; hydrodynamics; instabilities; waves
Description Recent calculations of multicomponent radiatively driven stellar winds of cool B stars showed that friction between individual components significantly lowers the terminal wind velocity. In addition, there is a large heating at the base of these winds caused by frictional and Gayley-Owocki heating. Such winds may be highly unstable resulting either in radiative-acoustic waves propagating both downstream and upstream or in unstable regions. Consequently, instabilities in the stellar wind influence the photospheric structure of these stars.
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