NLTE wind models of hot subdwarf stars

Details NLTE wind models of hot subdwarf stars NLTE wind models of hot subdwarf stars

2010-04-19

arxiv.org/abs/1004.3121v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

7 pages, to appear in Astrophysics and Space Science. The final publication will be available at springerlink.com.

Scientific paper

10.1007/s10509-010-0385-z

We calculate NLTE models of stellar winds of hot compact stars (central stars of planetary nebulae and subdwarf stars). The studied range of subdwarf parameters is selected to cover a large part of these stars. The models predict the wind hydrodynamical structure and provide mass-loss rates for different abundances. Our models show that CNO elements are important drivers of subdwarf winds, especially for low-luminosity stars. We study the effect of X-rays and instabilities on these winds. Due to the line-driven wind instability, a significant part of the wind could be very hot.

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