Aschenbach 2007 SN 1987A的X射线演变

主要内容:
差不多8000天的观测，还在一直上升，说明肯定是遗迹的贡献。

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文章信息:

X-ray Evolution of SN 1987A

Authors: Bernd Aschenbach

(Submitted on 23 May 2007)

Abstract: The X-ray observations of SN 1987A over the previous 20 years have seen the emergence of soft X-rays from the interaction of the explosion shock wave with the ambient medium. This shock wave is now interacting strongly with the inner ring and might have passed already the highest density regions. The emission can be described by thermal models with two temperatures, with perhaps some but little change over time. Relative to the elemental abundances prevailing in the LMC the inner ring shows an overabundance of Si and S compared to the lighter elements and Fe, which suggests that the ring consists of highly processed matter dredged up in a binary merger event well before the explosion. The X-ray lightcurves between 0.5--2 keV and 3--10 keV differ significantly in slope, with the latter being much flatter but very similar to the radio light curve.