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Decoupling of Helium in The Winds of Chemically Peculiar Stars

Published online by Cambridge University Press:  12 April 2016

Jiří Kubát  and
Jiří Krtička
Jiří Kubát
Affiliation:
Astronomický ústav AV ČR, CZ-251 65 Ondřejov, Czech Republic
Jiří Krtička
Affiliation:
ÚTFA PřF MU, Kotlářská 2, CZ-611 37 Brno, Czech Republic

Abstract

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We calculate hydrodynamic multicomponent models of radiatively driven winds in B type stars. Our wind models consist of four components, namely hydrogen, helium, accelerated ions, and electrons. We solve equations of continuity, motion, and energy for all components and we take into account mutual collisions. The resulting models show large heating caused by friction. Results of our calculations show that the explanation of helium chemical peculiarity by the helium decoupling from the mean wind is unlikely.

Type
Part 7. Chemical composition of variable stars
Information
International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 439 - 442
Copyright
Copyright © Astronomical Society of the Pacific 2004

References

Alecian, G. 1995 Astrofizika, 38, 533 Google Scholar
Babel, J. 1996 A&A, 309, 867 Google Scholar
Hunger, K., Groote, D. 1999 A&A, 351, 554 Google Scholar
Krtička, J. 2001 Ph.D. thesis, Masaryk University Brno Google Scholar
Krtička, J. 2003, in ASP Conf. Ser., Vol. 288, Stellar Atmosphere Modelling, eds. Hubeny, I., Mihalas, D. & Werner, K., (San Francisco ASP), 259 Google Scholar
Krtička, J., Kubát, J. 2000 A&A, 359, 983 Google Scholar
Krtička, J., Kubát, J. 2001 A&A, 369, 222 Google Scholar
Krtička, J., Kubát, J. 2002 A&A, 388, 531 Google Scholar
Owocki, S.P., Puls, J. 2002 ApJ, 568, 965 Google Scholar
Porter, J.M., Skouza, B.A. 1999 A&A, 344, 205 Google Scholar
Vauclair, S. 2003 Ap&SS, 284, 205 Google Scholar