Abstract
The character of intrinsic pulse period changes in X-ray pulsars supports the now conventional model for these sources, wherein the X-ray luminosity is derived from the accretion of matter on to a rotating, magnetised compact object, probably a neutron star, and the pulse period changes are caused by its interaction with the accreting matter.
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Rappaport, S., Joss, P. Accretion torques in X-ray pulsars. Nature 266, 683–685 (1977). https://doi.org/10.1038/266683a0
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DOI: https://doi.org/10.1038/266683a0
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