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Discs gone with the wind?
G. Shaviv 1,
D. Wickramasinghe 2 and
R. Wehrse 3
Received 1 October 1998 / Accepted 24 December 1998
We examine the conditions imposed on the vertical structure of accretion discs for them to exist. We find that a wind powered by a thermal instability exists in all discs with certain opacity laws. We find that for discs dominated by bremsstrahlung radiation, an inner hole develops below a certain accretion rate, and that for very low accretion rates, discs may not form at all. The consequences of our results are discussed in relation to black hole soft x-ray transient (BHSXT) accretion discs, and accretion discs in other systems.
Key words: accretion, accretion disks stars: binaries: close stars: circumstellar matter stars: white dwarfs X-rays: stars
Send offprint requests to: G. Shaviv
Online publication: March 18, 1999