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Two Modes of Disc Accretion in X-ray Pulsars?

Published online by Cambridge University Press:  26 May 2016

Ulf Torkelsson
Ulf Torkelsson*
Affiliation:
Department of Astronomy & Astrophysics, Chalmers University of Technology/Göteborg University, S-412 96 Gothenburg, Sweden

Abstract

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In this paper I compare the properties of the Be/X-ray transients to those of disc accreting X-ray pulsars that show torque reversals without significant changes in the X-ray fluxes. I find that it is unlikely that the cause of the torque reversal is a radiation-induced warp in the accretion disc. The preferred explanations of the phenomenon is that either there is an intrinsic difference in the properties of the neutron stars between the two groups of objects, or that the torque reversals appear in systems in which the accretion disc is formed from a stellar wind.

Type
Part 6 X-Ray Binaries
Information
Symposium - International Astronomical Union , Volume 214: High Energy Processes and Phenomena in Astrophysics , 2003 , pp. 220 - 223
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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