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On the X-ray light curve, pulsed-radio emission, and spin frequency evolution of the transient anomalous X-ray pulsar XTE J1810-197 during its X-ray outburst

Ertan, Ünal and Erkut, M. Hakan (2008) On the X-ray light curve, pulsed-radio emission, and spin frequency evolution of the transient anomalous X-ray pulsar XTE J1810-197 during its X-ray outburst. The Astrophysical journal, 673 (2). pp. 1062-1066. ISSN 0004-637X

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Official URL: http://dx.doi.org/10.1086/524679

Abstract

We show that: (i) the long-term X-ray outburst light curve of the transient AXP XTE J1810-197 can be accounted for by a fallback disk that is evolving towards quiescence through a disk instability after having been heated by a soft gamma-ray burst, (ii) the spin-frequency evolution of this source in the same period can also be explained by the disk torque acting on the magnetosphere of the neutron star, (iii) most significantly, recently observed pulsed-radio emission from this source coincides with the epoch of minimum X-ray luminosity. This is natural in terms of a fallback disk model, as the accretion power becomes so low that it is not sufficient to suppress the beamed radio emission from XTE J1810--197.

Item Type:Article
Uncontrolled Keywords:accretion, accretion disks; pulsars : individual (AXPs); stars : neutron; X-rays : bursts
Subjects:Q Science > QC Physics
ID Code:11364
Deposited By:Ünal Ertan
Deposited On:14 May 2009 17:16
Last Modified:16 Nov 2009 16:05

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