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Are the Galactic-bulge X-ray sources magnetized?This paper attempts to demonstrate that a better understanding of Galactic-bulge X-ray sources can be achieved if their magnetic moments are assumed to have the same values as those of young pulsars. It is argued that most of the matter leaving the inner edge of the accretion disk can reach the neutron star's surface in the form of massive clumps in quasi-Keplerian orbits. As a result, most of the accretion flow covers a broad equatorial belt rather than the polar caps, and the star shines as an almost unpulsed source. The liberation of half of the accretion power before the surface is reached can lead to the reported UHE pulses and bright infrared bursts. Spasmodic accretion is discussed as a model for gamma-ray bursts, and the observed low-energy X-ray absorption features are considered as an indication of strong magnetic fields shifted to lower energies during super-Eddington outbursts.
Document ID
19870056711
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kundt, W.
(Bonn, Universitaet Germany)
Ozel, M. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ercan, E. N.
(University of the Bosphorus Istanbul, Turkey)
Date Acquired
August 13, 2013
Publication Date
May 1, 1987
Publication Information
Publication: Astronomy and Astrophysics
Volume: 177
Issue: 1-2,
ISSN: 0004-6361
Subject Category
Astrophysics
Accession Number
87A43985
Distribution Limits
Public
Copyright
Other

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