Computer Science
Scientific paper
Apr 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..366...66k&link_type=abstract
High velocity neutron stars and gamma-ray bursts. AIP Conference Proceedings, Volume 366, pp. 66-66 (1996).
Computer Science
Gamma-Ray Sources, Gamma-Ray Bursts, Gamma-Ray
Scientific paper
Much progress has been made in our understanding of soft gamma ray repeaters primarily due to multiwavelength observations. Two of the three SGRs are definitely associated with quiescent X-ray emission and all three can be associated with SNRs. SGR 1806-20 has been identified with a plerion, a non-thermal nebula usually identified with pulsar powered SNRs. High resolution VLA observations reveal a compact source with outflow. This source coincides with a bright star, probably the rare blue luminous blue variables. This may well represent the first stellar identification of an SGR. A case for a binary model for SGRs can be made from the observations of SGR 1806-20 but this model is not supported from multiwavelength observations of SGR 0526-66. SGR 1900+14 has been plausibly identified with a quiescent X-ray source which has no radio counterpart, akin to the situation of SGR 0526-66. Thus there is no definite pattern that has emerged save the following. SGRs are associated with young neutron stars and in some cases with massive stars. The absence of radio emission in two out of three cases is suggestive that the bursts themselves may inject particles. Why SGR 1806-20 has a plerion remains a mystery. Radio observations that are currently in progress should be able to shed light on the important issue whether particles accompany photon outbursts.
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