Investigating the X-ray Variability of Cassiopeia A

Details Investigating the X-ray Variability of Cassiopeia A Investigating the X-ray Variability of Cassiopeia A

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hst..prop11337p&link_type=abstract

HST Proposal ID #11337. Cycle 16

Physics

Scientific paper

We propose a 50 ksec ACIS-S observation of Cas A to follow X-ray flux changes associated with ejecta recently encountered by the reverse shock. This will allow us to investigate Cas A's near-term X-ray evolution and the fine-scale structure of its SN debris. We also request the Chandra observation be followed by HST NICMOS & WFPC2 images of four identified X-ray variable features in the high ionization NIR lines of [Si VI] and [Si X] and low ionization optical lines of [S II] and [O III]. The proposed X-ray/optical/NIR observations will yield a multi-wavelength study of the remnant's advancing reverse shock in an inhomogeneous multi-phase ejecta medium at resolutions down to a fraction of an arcsecond, providing a hi-resolution broad temperature study of reverse shock heated SN ejecta.;

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