The detection of the Sc-44 nuclear de-excitation lines and hard X-ray emission from Cas A

Details The detection of the Sc-44 nuclear de-excitation lines and hard X-ray emission from Cas A The detection of the Sc-44 nuclear de-excitation lines and hard X-ray emission from Cas A

2002-05-15

arxiv.org/abs/astro-ph/0205235v1

Astronomy and Astrophysics

Astrophysics

To appear in the proceedings of the XXII Moriond Astrophysics Meeting "The Gamma-Ray Universe", eds. A. Goldwurm, D. Neumann,

Scientific paper

We discuss the detection of Sc-44 (product of Ti-44) in the supernova remnant Cas A with the BeppoSAX-PDS instrument, and elaborate on the nature of the hard X-ray continuum, which is not only important for correctly estimating the Sc-44 flux, but is interesting in its own right. We apply the lower hybrid wave electron acceleration model to the hard X-ray data and use upper limits on the cosmic ray injection spectrum to infer that B > 2 mG. We conclude with the prospects of observing nuclear decay lines and electron-positron annihilation in Cas A with INTEGRAL.

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