An expansion measurement of RCW 86: is it the remnant of SN185?

Details An expansion measurement of RCW 86: is it the remnant of SN185? An expansion measurement of RCW 86: is it the remnant of SN185?

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2183v&link_type=abstract

Chandra Proposal ID #08500791

Physics

Chandra Proposal Id #08500791

Scientific paper

RCW 86 is one of a few SNRs emitting X-ray synchrotron radiation. This is surprising, given that shock velocities have been measured of only V~600 km/s. For those velocities standard shock acceleration theory does not predict X-ray synchrotron radiation. Based on a previous Chandra observation we argue that in regions with X-ray synchrotron radiation the shock speed is higher (V~3000 km/s), and that large differences in velocities are caused by an evolution inside a wind blown bubble: parts of the SNR inside the bubble still have a high shock velocity, whereas the bright parts are where the shock has reached the bubble shell. Interestingly, this would make the age of RCW 86 consistent with an explosion in AD185. We propose a 75ks observation for directly measuring the expansion.

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