Magnetar-like Emission from the Young Pulsar in Kes 75

Details Magnetar-like Emission from the Young Pulsar in Kes 75 Magnetar-like Emission from the Young Pulsar in Kes 75

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.2105g&link_type=abstract

American Astronomical Society, HEAD meeting #10, #21.05

Astronomy and Astrophysics

Astrophysics

Scientific paper

Soft Gamma Repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs) are thought to be magnetars - isolated neutron stars with ultra-high magnetic fields. These sources exhibit X-ray and gamma-ray bursts, and week to month-long flux enhancements, all too bright to be accounted for by their spin-down luminosity. A mystery in neutron star astrophysics is why such emission has never been seen from rotation-powered pulsars with magnetar-like fields. Here we report the first detection of magnetar-like X-ray bursts from what has been long thought to be a rotation-powered pulsar, PSR J1846-0258, at the center of the supernova remnant Kes 75. PSR J1846-0258 has an inferred surface dipolar magnetic field of 4.9x1013 G, which is sixth highest among the >1700; known rotation-powered pulsars, but less than those of the 12 confirmed magnetars. The bursts coincided with a sudden flux increase and an unprecedented change in timing behavior, firmly establishing PSR J1846-0258 as a rotation-powered pulsar/magnetar transition object. These observations demonstrate that magnetar-like emission can be seen from sources with fields lower than the magnetars, and suggest that the intensity of magnetar-like activity in neutron stars depends on magnetic field strength in a more continuous way than previously thought.

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