Relating the spectrum of Type I X-ray bursts to spin changes of neutron star atmospheres

Details Relating the spectrum of Type I X-ray bursts to spin changes of neutron star atmospheres Relating the spectrum of Type I X-ray bursts to spin changes of neutron star atmospheres

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..nws.c3003c&link_type=abstract

American Physical Society, Fourth Annual Meeting of the Northwest Section, abstract #C3.003

Physics

Scientific paper

Type I X-ray bursts are thermonuclear flashes occurring on the surface of accreting neutron stars in low mass X-ray binaries. Measurements have shown that the brightness of these bursts is not constant, but oscillatory. The varying brightness is thought to be attributable to an inhomogeneity in the burning process, and so the frequency of the observed oscillations is related to the spin rate of the neutron star. It has been proposed by Strohmayer et al. that the burning ``shell'' of accreted matter decouples from the star, and that its spinning is governed by the conservation of angular momentum (see Strohmayer et al., ApJ 486:355--362, 1997). We adopt this picture, and present results relating the shape of a bright spot in the atmosphere to the frequency spectrum of a burst.

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