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Why low-mass black hole binaries are transient

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journal contribution
posted on 2012-10-24, 09:07 authored by AR King, U Kolb, E Szuszkiewicz
We consider transient behavior in low-mass X-ray binaries (LMXBs). In short-period neutron star systems (orbital period lesssim1 day) irradiation of the accretion disk by the central source suppresses this behavior except at very low mass transfer rates. Formation constraints, however, imply that a significant fraction of these neutron star systems have nuclear-evolved main-sequence secondaries and thus mass transfer rates low enough to be transient. But most short-period low-mass black hole systems will form with unevolved main-sequence companions and have much higher mass transfer rates. The fact that essentially all of them are nevertheless transient shows that irradiation is weaker, which is a direct consequence of the fundamental black hole property—the lack of a hard stellar surface.

Funding

Theoretical astrophysics research at Leicester is supported by a PPARC rolling grant. A. R. K. gratefully acknowledges the award of a PPARC Senior Fellowship

History

Citation

Astrophysical Journal, 1997, 488(1)

Version

  • VoR (Version of Record)

Published in

Astrophysical Journal

Publisher

American Astronomical Society, IOP Publishing

issn

2041-8205

eissn

2041-8213

Copyright date

1997

Available date

2012-10-24

Publisher version

https://iopscience.iop.org/article/10.1086/304700

Language

en

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