Long-term evolution of dim isolated neutron stars
Ertan, Ünal and Çalışkan, Şirin and Benli, Onur and Alpar, M. Ali (2014) Long-term evolution of dim isolated neutron stars. Monthly Notices of the Royal Astronomical Society, 444 (2). pp. 1559-1565. ISSN 0035-8711 (Print) 1365-2966 (Online)
Official URL: http://dx.doi.org/10.1093/mnras/stu1523
The X-ray dim isolated neutron stars (XDINs) have periods in the same range as the anomalous X-ray pulsars (AXPs) and the soft gamma-ray repeaters (SGRs). We apply the fallback disc model, which explains the period clustering and other properties of AXP/SGRs, to the six XDINs with measured periods and period derivatives. Present properties of XDINs are obtained in evolutionary scenarios with surface dipole magnetic fields B-0 similar to 10(12) G. The XDINs have gone through an accretion epoch with rapid spin-down earlier, and have emerged in their current state, with the X-ray luminosity provided by neutron star cooling and no longer by accretion. Our results indicate that the known XDINs are not likely to be active radio pulsars, as the low B-0, together with their long periods place these sources clearly below the 'death valley'.
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