The Dynamic Behavior of Soft Gamma Repeaters
arXiv:astro-ph/0304372 · doi:10.1016/j.asr.2003.04.022
Abstract
Soft Gamma Repeaters (SGRs) undergo changes in their pulse properties and persistent emission during episodes of intense burst activity. Both SGR 1900+14 and SGR 1806-20 have shown significant changes in their spin-down rates during the last several years, yet the bulk of this variability is not correlated with burst activity. SGR 1900+14 has undergone large changes in flux and a dramatic pulse profile change following burst activity in 1998. The flux level of SGR 162741 has been decreasing since its only recorded burst activity. Here, we review the global properties of SGRs as well as the observed dynamics of the pulsed and persistent emission properties of SGR 1900+14, SGR 1806-20 and SGR 1627-41 during and following burst active episodes and discuss what implications these results have for the burst emission mechanism, the magnetic field dynamics of magnetars, the nature of the torque variability, and SGRs in general.
Invited review to appear in "High Energy Studies of Supernova Remnants and Neutron Stars" (COSPAR 2002). 12 pages, 7 figures
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Cited by in corpus (6)
- Discovery of hard non-thermal pulsed X-ray emission from the anomalous X-ray pulsar 1E 1841-045
- Scale-invariance in soft gamma repeaters
- Giant flare of SGR 1806-20 from a relativistic jet
- Propagation and Transmission of Alfven Waves in Rotating Magnetars
- Magnetars and Gamma Ray Bursts
- Search for spatial coincidence between magnetars and IceCube detected neutrinos