Supernova 1987A: The Latest Evolution in X-Rays

Details Supernova 1987A: The Latest Evolution in X-Rays Supernova 1987A: The Latest Evolution in X-Rays

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tmgm.meet.1281p&link_type=abstract

The Tenth Marcel Grossmann Meeting. Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF), Rio

Physics

Scientific paper

We summarize the results of our monitoring observations of the X-ray remnant of supernova (SN) 1987A with the Chandra X-Ray Observatory. As of 2002 December, we have performed a total of seven observations of SN 1987A. The images from the latest data reveal the development of X-ray-bright spots in the northwestern and the southwestern portions, as well as in the eastern side, of the remnant. The latest 0.5-2 keV band flux (LX ~ 6 × 10-13 ergs s-1 cm-2) is four times brighter than three years ago. The overall X-ray emission is primarily from the blast wave shock with kT ~ 2.4 keV. As the blast wave approaches the dense circumstellar material, the contribution from the decelerated shock (kT ~ 0.22 keV) to the observed X-ray emission is becoming significant. Based on the best-fit two-shock component model, we derive the densities of the X-ray-emitting regions (ne ~ 235 cm-3 for the fast shock and ne ~ 7500 cm-3 for the slow shock). An upper limit on the X-ray luminosity of any embedded point source is LX ≤ 1.5 × 1034 ergs s-1 in the 2-10 keV band.

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