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X-ray and infrared enhancement of anomalous x-ray pulsar 1E 2259+586

By Ünal Ertan, Unal Ertan, Ersin Göğüş, Ersin Gogus and M. Ali Alpar

Abstract

The long-term ( 1.5 yr) X-ray enhancement and the accompanying infrared enhancement light curves of the anomalous X-ray pulsar 1E 2259+586 following the major bursting epoch can be accounted for by the relaxation of a fallback disk that has been pushed back by a gamma-ray flare. The required burst energy estimated from the results of our model fits is low enough for such a burst to have remained below the detection limits. We find that an irradiated disk model with a low irradiation efficiency is in good agreement with both X-ray and infrared data. Nonirradiated disk models also give a good fit to the X-ray light curve, but are not consistent with the infrared data for the first week of the enhancement

Topics: QB Astronomy
Publisher: The American Astronomical Society
Year: 2006
DOI identifier: 10.1086/500097
OAI identifier: oai:research.sabanciuniv.edu:104

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