Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001chfe.sympe..13v&link_type=abstract
Chandra Fellows Symposium 2001, held 15 October, 2001 at Harvard-Smithsonian Center for Astrophysics, meeting abstract.
Astronomy and Astrophysics
Astrophysics
Scientific paper
I will present the results of an analysis of XMM-Newton observation of the supernova remnant MSH 14-63 (also known as RCW 86 and G315.4-2.3). The X-ray emission from this object is peculiar (as already observed by ASCA), in that there are very distinct hard X-ray and soft X-ray emitting regions. The lack of line emission from the hard X-ray emitting regions has been attributed to X-ray synchrotron emission, but the detection of Fe K emission at 6.4 keV, and the lack of spatial correlation between hard X-ray and radio emission is evidence against a dominant X-ray synchrotron component. Instead I will argue that the hard X-ray continuum is best explained by non-thermal bremsstrahlung from a supra-thermal tail to an otherwise cool electron gas. The existence of low electron temperatures, required to explain the absence of line emission and to explain the low charge state of iron, is supported by low temperatures found in other parts of the remnant, which are as low as 0.2 keV in some regions.
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