A Two-Temperature Supernova Fallback Disk Model for Anomalous X-ray Pulsars

Details A Two-Temperature Supernova Fallback Disk Model for Anomalous X-ray Pulsars A Two-Temperature Supernova Fallback Disk Model for Anomalous X-ray Pulsars

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002chjaa...2..161l&link_type=abstract

Chinese Journal of Astronomy & Astrophysics, Vol. 2, p. 161-168

Astronomy and Astrophysics

Astrophysics

2

Pulsars: General, Pulsars, Stars: Neutron, X-Rays: Stars, Accretion Disk, Instability

Scientific paper

We present a case study of the relevance of the radially pulsational instability of a two-temperature accretion disk around a neutron star to anomalous X-ray pulsars (AXPs). Our estimates are based on the approximation that such a neutron star disk with mass in the range of 10-6-10-5 Msolar is formed by supernova fallback. We derive several peculiar properties of the accretion disk instability: a narrow interval of X-ray pulse periods; lower X-ray luminosities; a period derivative and an evolution time scale. All these results are in good agreement with the observations of the AXPs.

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