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Modelling lightcurves and spectra of transient Anomalous X-ray Pulsars | | S. Zane
; A. Albano
; R. Turolla
; G.L. Israel
; L. Nobili
; L. Stella
; | | Date: |
4 Mar 2011 | | Abstract: | We present the first detailed joint modelling of both the timing and spectral
properties during the outburst decay of transient anomalous X-ray pulsars. We
consider the two sources XTE J1810-197 and CXOU J164710.2-455216, and describe
the source decline in the framework of a twisted magnetosphere model, using
Monte Carlo simulations of magnetospheric scattering and mimicking localized
heat deposition at the NS surface following the activity. Our results support a
picture in which a limited portion of the star surface close to one of the
magnetic poles is heated at the outburst onset. The subsequent evolution is
driven both by the cooling/varying size of the heated cap and by a progressive
untwisting of the magnetosphere. | | Source: | arXiv, 1103.0955 | | Services: | Forum | Review | PDF | Favorites | |
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