Magnetic field limit on SGR 1900+14

Details Magnetic field limit on SGR 1900+14 Magnetic field limit on SGR 1900+14

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..906r&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Astronomy and Astrophysics

Astronomy

Electric And Magnetic Fields, Gamma-Ray Sources, Gamma-Ray Bursts, Pulsars

Scientific paper

We measured the period and spin-down rate for SGR 1900+14 during the quiescient period two years before the recent interval of renewed burst activity. We have shown that the spin-down age of SGR 1900+14 is consistent with a braking index of ~1 which is appropriate for wind torques and not magnetic dipole radiation. We have shown that a combination of dipole radiation, and wind luminosity, coupled with estimated ages and present spin parameters, imply that the magnetic field for SGR 1900+14 is less than 6×1013 G and that the efficiency for conversion of wind luminosity to x-ray luminosity is <2%. .

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