X-ray evolution of SNR 1987A: The radial expansion

Judith L. Racusin, Sangwook Park, Svetozar Zhekov, David N. Burrows, Gordon P. Garmire, Richard McCray

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


We present the evolution of the radial expansion of SNR 1987A as measured using Chandra X-ray observations taken over the last 10 years. To characterize the complex structure of the remnant and isolate the expansion measurement, we fit the images to several empirical models including: a simple circular torus, a torus with bilateral lobes, and a torus with four tangentially extended lobes. We discuss the results of this measure in the context of the overall evolution of the supernova remnant, for which we believe we have measured the end of the free expansion phase and its transition to the adiabatic phase (at least along the equatorial ring). The timing of this event is in agreement with early predictions of the remnant evolution.

Original languageEnglish (US)
Pages (from-to)1752-1759
Number of pages8
JournalAstrophysical Journal
Issue number2
StatePublished - 2009

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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