Soft Gamma Repeaters - Magnetars: Observational results

Details Soft Gamma Repeaters - Magnetars: Observational results Soft Gamma Repeaters - Magnetars: Observational results

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.s7001k&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Soft Gamma Repeaters (SGRs) form a class of neutron stars that emit persistent X-ray radiation and recurrent X-ray bursts in random patterns. These emissions are predominantly soft, with most of the photons at energies between 20 - 100 keV. SGRs have recently been found to possess ultra-high magnetic fields, of the order of 10^14-10^15 G. Such objects, dubbed "magnetars", had been predicted to exist in 1992, but the first concrete observational evidence were obtained in 1998 for two of these sources. I will discuss here the history of SGRs, their spectral, timing and flux characteristics both in the persistent and their burst emission. I will present recent observational results, describe the prevailing theories and link these sources with other objects with similar properties.

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