Ben-Gurion University of the NegevAstrophysics and Cosmology GroupAstrophysics, Relativity, Cosmology, and Space Physics |
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Speaker: Nazar Ickhsanov (Pulkovo obs., Russia) January 5, 2015 (note: Monday) A new look at the Anomalous X-ray Pulsars Abstract: We
explore a possibility to model spin evolution of the Anomalous X-ray
Pulsars (AXPs) in terms of accretion by an isolated neutron star from a
fossil non-Keplerian magnetic disk. We show that the observed spin-down
rates of the neutron stars can be explained within this scenario
provided the surface magnetic field of the star is ranged within the
interval 0.1 - 10 TG.
The X-ray spectrum of the pulsars under these conditions is soft and fits well the observed spectrum. We show that the period clustering of these pulsars may indicate that these neutron stars are the descendants of High Mass X-ray Binaries which have been disintegrated in the core-collapse supernova explosion. The gamma-rays activity of these sources within this approach is associated with the fission of heavy nuclei stored at the bottom of upper crust of neutron stars. |
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Last updated
by Uri Keshet,
2013 |