Time Evolution of the Reverse Shock in SN 1006

Details Time Evolution of the Reverse Shock in SN 1006 Time Evolution of the Reverse Shock in SN 1006

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725619w&link_type=abstract

American Astronomical Society, AAS Meeting #217, #256.19; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Scientific paper

The Schweizer-Middleditch star, located behind the SN 1006 remnant and near its center in projection, provides the opportunity to study cold, expanding ejecta within the SN 1006 shell through UV absorption. Especially notable is an extremely sharp red edge to the Si II 1260 Ang. feature. Using spectra obtained with COS in 2010, and comparing with ones obtained with STIS in 1999, we have measured changes in this and other features over the intervening 10+ year baseline. We find that the Si II edge has shifted to the blue by about 0.1 Ang, which means that the reverse shock has slowed by about 2.3 km/s per year. This is the first observational confirmation of this predicted dynamic effect for a reverse shock: that the shock will apparently decelerate as it works its way inward through expanding supernova ejecta, encountering ever slower material as it proceeds.
This research is supported by NASA Grant HST-GO-11659-01-A.

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