Bow Shock Phenomena in the Cas A Supernova Remnant

Details Bow Shock Phenomena in the Cas A Supernova Remnant Bow Shock Phenomena in the Cas A Supernova Remnant

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20510606p&link_type=abstract

American Astronomical Society Meeting 205, #106.06; Bulletin of the American Astronomical Society, Vol. 36, p.1521

Astronomy and Astrophysics

Astronomy

Scientific paper

We present an analysis of the prominent bow shock-like feature (`Feature C') visible in both X-rays and radio synchrotron emission along the outer, northern shock boundary of the Cassiopeia A supernova remnant. Proper motion measurements using 2000 and 2004 Chandra X-ray image data of the bright emission knot at the leading edge of this apparent bow shock structure indicate a transverse velocity of 11000 ± 2000 km s-1. This is significantly larger than the 5000 - 6500 km s-1 velocity of the X-ray emitting forward shock front in this region of the remnant. We also present the X-ray spectrum of the bow shock's bright knot and compare it to spectra of neighboring sections of the forward shock. We will also show dynamical model results of ejecta `bullets' interacting with the forward and reverse shock fronts as well as local ISM/CSM clouds in order to simulate the observed bow shock structure.
This research was funded by the Chandra X-ray Observatory through the Archival Research Award AR4-5005X.

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