Disks irradiated by beamed radiation from compact objects

Details Disks irradiated by beamed radiation from compact objects Disks irradiated by beamed radiation from compact objects

2000-09-19

arxiv.org/abs/astro-ph/0009288v1

Astronomy and Astrophysics

Astrophysics

11 pages with 4 figures, accepted to ApJ Letters

Scientific paper

10.1086/317300

We examine the reprocessing of X-ray radiation from compact objects by accretion disks when the X-ray emission from the star is highly beamed. The reprocessed flux for various degrees of beaming and inclinations of the beam axis with respect to the disk is determined. We find that, in the case where the beam is produced by a non-relativistic object, the intensity of the emitted spectrum is highly suppressed if the beam is pointing away from the disk. However, for beams produced by compact objects, general relativistic effects cause only a small reduction in the reradiated flux even for very narrow beams oriented perpendicularly to the disk. This is especially relevant in constraining models for the anomalous X-ray pulsars, whose X-ray emission is highly beamed. We further discuss other factors that can influence the emission from disks around neutron stars.

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