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Science 30 May 1997:
Vol. 276. no. 5317, pp. 1374 - 1378
DOI: 10.1126/science.276.5317.1374
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Articles

Type II Supernovae SN 1987A and SN 1993J

Roger A. Chevalier

The optical and ultraviolet emission from the type II supernova SN 1987A is currently powered by the radioactive decay of titanium-44. In contrast, the emission from SN 1993J is dominated by radiation from the interaction of the supernova shock wave with a dense, stellar wind released before the explosion. The dense wind around SN 1987A was displaced by the fast wind from the compact progenitor star, and the interaction of the supernova with dense gas is now being detected at x-ray and radio wavelengths. The expected neutron stars or black holes at the centers of these supernovae are not yet significant power sources.

The author is with the Department of Astronomy, University of Virginia, Post Office Box 3818, Charlottesville, VA 22903, USA.

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Nucleosynthesis in Stars: Recent Developments.
D. Arnett and G. Bazan (1997)
Science 276, 1359-1362
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