The Proper Motion of the Soft Gamma Repeater SGR1900+14

Details The Proper Motion of the Soft Gamma Repeater SGR1900+14 The Proper Motion of the Soft Gamma Repeater SGR1900+14

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..599h&link_type=abstract

Chandra Proposal ID #02500326

Astronomy and Astrophysics

Astronomy

Chandra Proposal Id #02500326

Scientific paper

There is good evidence that the soft gamma repeaters are magnetars, i.e. neutron stars with magnetic fields B~10^15 G. The magnetar model predicts that they may be born with very high velocities, and SGR1900+14 appears to be an extreme example of this. Indeed its likely transverse proper motion is so large that it can be measured by a simple Chandra observation. This is an important test of the model. Even if the star is moving slowly, Chandra can put stringent bounds on its transverse motion. Either outcome would have a significant impact on our understanding of SGRs. We believe that this would be the first time that X-ray measurements have been used to perform accurate astrometry and derive a proper motion.

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