Journal Article

Evolution of the <i>Chandra</i> CCD spectra of SNR 1987A: probing the reflected-shock picture

Svetozar A. Zhekov, Sangwook Park, Richard McCray, Judith L. Racusin and David N. Burrows

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 407, issue 2, pages 1157-1169
Published in print September 2010 | ISSN: 0035-8711
Published online September 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.16967.x
Evolution of the Chandra CCD spectra of SNR 1987A: probing the reflected-shock picture

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We continue to explore the validity of the reflected-shock structure (RSS) picture in SNR 1987A that was proposed in our previous analyses of the X-ray emission from this object. We used an improved version of our RSS model in a global analysis of 14 CCD spectra from the monitoring program with Chandra. In the framework of the RSS picture, we are able to match both the expansion velocity curve deduced from the analysis of the X-ray images and light curve. Using a simplified analysis, we also show that the X-rays and the non-thermal radio emission may originate from the same shock structure (the blast wave). We believe that using the RSS model in the analysis of grating data from the Chandra monitoring program of SNR 1987A that cover a long enough time interval will allow us to build a more realistic physical picture and model of SNR 1987A.

Keywords: supernovae: individual (SNR 1987A); ISM: supernova remnants; X-rays: ISM

Journal Article.  10633 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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