Probing the Nature of the Torque Variability in SGR 1900+14

Details Probing the Nature of the Torque Variability in SGR 1900+14 Probing the Nature of the Torque Variability in SGR 1900+14

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1214w&link_type=abstract

Chandra Proposal ID #04500504

Physics

Chandra Proposal Id #04500504

Scientific paper

Soft Gamma Repeaters (SGRs) are sources of transient burst emission, widely believed to be strongly magnetized neutron stars or magnetars. Each of the four known SGRs has a persistent X-ray counterpart; two of which show coherent pulsations and rapid spindown, presumably due to magnetic braking. The infered torque on SGR 1900+14 has been shown to vary by more than a factor 5, uncorrelated with the burst behavior. Here, we propose for a sequence of Chandra observations to simultaneously monitor the flux/spectrum and the torque (through RXTE/PCA) of SGR 1900+14. Studying the correlated behavior will allow us to constrain the underlying physical mechanism responsible for the torque in this system, and thereby, better understand the nature of this source.

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