Visualizing the Inner Regions of Accretion Disks around Neutron Stars using Superbursts

Details Visualizing the Inner Regions of Accretion Disks around Neutron Stars using Superbursts Visualizing the Inner Regions of Accretion Disks around Neutron Stars using Superbursts

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.3304b&link_type=abstract

American Astronomical Society, HEAD meeting #8, #33.04; Bulletin of the American Astronomical Society, Vol. 36, p.970

Astronomy and Astrophysics

Astronomy

Scientific paper

The bright X-ray emission from a superburst on the surface of a neutron star can act as a spotlight to illuminate the disk surface. The X-rays cause iron atoms in the disk to fluoresce, allowing a determination of the ionization state, covering factor and inner radius of the disk over the course of the burst. Here, we review the results of time-resolved spectral fitting of the superburst from 4U 1820-30, in which we found strong evidence that the inner region of the accretion disk was disrupted by the burst. We will then present new results from an analysis of the superburst from 4U 1636-536. In this case, the time-resolved spectral fitting reveals an intriguing new behavior that is quite different from the previous system.

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