Settling accretion onto slowly rotating X-ray pulsars

Quasi-spherical subsonic accretion onto slowly rotating magnetized NS is considered, when the accreting matter settles down subsonically onto the rotating magnetosphere, forming an extended quasi-static shell. The shell mediates the angular momentum transfer to/from the rotating NS magnetosphere by...

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Bibliographic Details
Published in:arXiv.org 2013-02
Main Authors: Shakura, N I, Postnov, K A, A Yu Kochetkova, Hjalmarsdotter, L
Format: Article
Language:English
Subjects:
Angular momentum
Cooling rate
Cyclotrons
Deposition
Equilibrium
Luminosity
Magnetic fields
Magnetospheres
Momentum transfer
Neutron stars
Neutrons
Orbits
Pulsars
Rotating spheres
Rotation
Settling
Stellar magnetic fields
Stellar winds
Taylor instability
Variations
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Summary:Quasi-spherical subsonic accretion onto slowly rotating magnetized NS is considered, when the accreting matter settles down subsonically onto the rotating magnetosphere, forming an extended quasi-static shell. The shell mediates the angular momentum transfer to/from the rotating NS magnetosphere by large-scale convective motions, which lead to an almost iso-angular-momentum rotation law inside the shell. The accretion rate through the shell is determined by the ability of the plasma to enter the magnetosphere due to Rayleigh-Taylor instability while taking cooling into account. The settling regime of accretion is possible for moderate X-ray luminosities L
ISSN:2331-8422
DOI:10.48550/arxiv.1302.0500