On multicomponent effects in stellar winds of stars at extremely low metallicity

Krticka, J., Owocki, S.P., Kubat, J., Galloway, R.K. and Brown, J.C. (2003) On multicomponent effects in stellar winds of stars at extremely low metallicity. Astronomy and Astrophysics, 402(2), 713 -718. (doi: 10.1051/0004-6361:20030287)

Abstract

We calculate multicomponent line-driven wind models of stars at extremely low metallicity suitable for massive first generation stars. For most of the models we find that the multicomponent wind nature is not important for either wind dynamics or for wind temperature stratification. However, for stars with the lowest metallicities we find that multicomponent effects influence the wind structure. These effects range from pure heating to possible fallback of the nonabsorbing wind component. We present a simple formula for the calculation of metallicity for which the multicomponent effects become important. We show that the importance of the multicomponent nature of winds of low metallicity stars is characterised not only by the low density of driving ions, but also by lower mass-loss rate.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Brown, Professor John
• Authors: Krticka, J., Owocki, S.P., Kubat, J., Galloway, R.K., and Brown, J.C.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Astronomy and Astrophysics
• Publisher: EDP Sciences
• ISSN: 0004-6361
• ISSN (Online): 1432-0746
• Copyright Holders: Copyright © 2003 EDP Sciences
• First Published: First published in Astronomy and Astrophysics 402(2):713-718
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher