AAS 199th meeting, Washington, DC, January 2002
Session 126. Supernova Remnants
Display, Thursday, January 10, 2002, 9:20am-4:00pm, Monroe/Lincoln

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[126.16] New Limits on the 44Sc 67.9 and 78.4 keV Line Fluxes from Cassiopeia A with a Realistic Model Hard X-ray Continuum

J. Vink (Columbia University, New York), J.M. Laming (Naval Research Laboratory, Washington DC)

We apply a recently developed model for the hard X-ray (up to 100 keV) continuum emission from the supernova remnant Cas A to a deep observation with the BeppoSAX PDS instrument. Our aim is to determine more realistic limits on the fluxes of 44Sc line emission (44Sc is a decay product of 44Ti, produced in alpha-rich freeze out during the explosion), and to exploit the diagnostic potential of the continuum itself in terms of the velocities of secondary shocks propagating within the Cas A shell and the density contrasts that cause them.

This work is supported by the NASA Chandra Postdoctoral Fellowship Award PF0-10011 issued by the Chandra X-Ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of NASA under contract NAS8-39073, and by basic research funds of the Office of Naval Research.

The author(s) of this abstract have provided an email address for comments about the abstract: jvink@astro.columbia.edu

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