Magnetic Field Limit on SGR 1900+14
Astrophysics
2007-05-23 v1
Abstract
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 x 10^13 G and that the efficiency for conversion of wind luminosity to x-ray luminosity is <2%.
Cite
@article{arxiv.astro-ph/9911238,
title = {Magnetic Field Limit on SGR 1900+14},
author = {R. E. Rothschild and D. Marsden and R. E. Lingenfelter},
journal= {arXiv preprint arXiv:astro-ph/9911238},
year = {2007}
}
Comments
4 pages, 2 figures, X-Ray Astronomy '99 (Bologna, Italy)