Radiation induced coronal wind in late B stars

Details Radiation induced coronal wind in late B stars Radiation induced coronal wind in late B stars

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004newa....9..215k&link_type=abstract

New Astronomy, Volume 9, Issue 3, p. 215-224.

Astronomy and Astrophysics

Astronomy

2

Stars: Early-Type, Stars: Coronae, Hydrodynamics, Stars: Winds, Outflows, Stars: Emission-Line, Be

Scientific paper

Multicomponent radiatively driven winds in the late B stars cause significant heating of the layers just above the photosphere. These heated layers form a hot region - a corona, which may provide a significant fraction of energy necessary for the formation of a coronal wind driven by gas pressure. Fast rotation of this radiation induced coronal wind may cause the formation of the disk. Disk inhibition by nonradial line force would have only a little effect in this case, since the main driving mechanism is pressure gradient and not absorption in spectral lines. Finally, we show that this coronal region may be a site of significant X-ray emission which is able to explain observed X-ray activity of early B stars.

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