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Accretion onto Magnetized Neutron Stars: Polar Cap Flow and Centrifugally Driven Winds

Published online by Cambridge University Press:  04 August 2017

Jonathan Arons
Jonathan Arons*
Affiliation:
Astronomy Department and Physics Department, University of California at Berkeley, and Institute of Geophysics and Planetary Physics, University of California, Lawrence Livermore Laboratory

Abstract

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Some basic concepts of accretion onto the polar caps of magnetized neutron stars are reviewed. Preliminary results of new, multidimensional, time–dependent calculations of polar cap flow are outlined, and are used to suggest the possible observability of fluctuations in the X–ray intensity of accretion powered pulsars on time scales of 10–100 msec. The possible relevance of such fluctuations to Quasi–Periodic oscillations is suggested. Basic concepts of the interaction between a disk and the magnetosphere of a neutron star are also discussed. Some recent work on the disk–magnetosphere interaction is outlined, leading to the suggestion that a neutron star can lose angular momentum by driving some or all of the mass in the disk off as a centrifugally driven wind. The relevance of such mass loss to the orbital evolution of the binary is pointed out.

Type
II. Accretion Powered Pulsars
Information
Symposium - International Astronomical Union , Volume 125: The Origin and Evolution of Neutron Stars , 1987 , pp. 207 - 225
Copyright
Copyright © Reidel 1987 

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