Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-10-05
Astronomy and Astrophysics
Astrophysics
13 pages, 2 Figures, accepted for publication in ApJ
Scientific paper
10.1086/524679
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.
Erkut Hakan M.
Ertan Ü.
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