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On the power spectra of the wind-fed X-ray binary pulsar GX 301 - 2A phenomenological model of accretion which is applied to the wind-fed X-ray binary pulsar GX 301 - 2 is developed, assuming that the accretion onto the neutron star does not occur from a continuous flux of plasma, but from blobs of matter which are threaded by the magnetic field lines onto the magnetic polar caps of the neutron star. These 'lumps' are produced at the magnetospheric limit by magnetohydrodynamical instability, introducing a 'noise' in the accretion process, due to the discontinuity in the flux of matter onto the neutron star. This model is able to describe the change of slope observed in the continuum component of the power spectra of the X-ray binary pulsar GX 301 - 2, in the frequency range 0.01 - 0.1 Hz. The physical properties of the infalling blobs derived in the model are in agreement with the constraints imposed by observations.
Document ID
19920041639
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Orlandini, Mauro
(NASA Goddard Space Flight Center Greenbelt, MD; SISSA, Trieste, Italy)
Morfill, G. E.
(Max-Planck-Institut fuer Extraterrestrische Physik Garching, Federal Republic of Germany, United States)
Date Acquired
August 15, 2013
Publication Date
February 20, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 386
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A24263
Distribution Limits
Public
Copyright
Other

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