Diagnosing magnetars with transient cooling

Abstract

Transient X-ray emission, with an approximate t^{-0.7} decay, was observed from SGR 1900+14 over 40 days following the the giant flare of 27 Aug 1998. We calculate in detail the diffusion of heat to the surface of a neutron star through an intense 10^{14}-10^{15} G magnetic field, following the release of magnetic energy in its outer layers. We show that the power law index, the fraction of burst energy in the afterglow, and the return to persistent emission can all be understood if the star is composed of normal baryonic material.

9 pages, 1 eps figure

References in corpus (3)

• Electrodynamics of Magnetars: Implications for the Persistent X-ray Emission and Spindown of the Soft Gamma Repeaters and Anomalous X-ray Pulsars
• Thermal structure and cooling of neutron stars with magnetized envelopes
• Strange Star Heating Events as a Model for Giant Flares of Soft Gamma-ray Repeaters

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