Gamma-Rays from Single Lobe Supernova Explosions

Abstract

Multi-dimensional simulations of the neutrino-driven mechanism behind core-collapse supernovae have long shown that the explosions from this mechanism would be asymmetric. Recently, detailed core-collapse simulations have shown that the explosion may be strongest in a single direction. We present a suite of simulations modeling these ``single-lobe'' supernova explosions of a 15 solar mass red supergiant star, focusing on the effect these asymmetries have on the gamma-ray emission and the mixing in the explosion. We discuss how asymmetries in the explosion mechanism might explain many of the observed ``asymmetries'' of supernovae, focusing on features of both supernova 1987A and the Cas A supernova remnant. In particular, we show that single-lobe explosions provide a promising solution to the redshifted iron lines of supernova 1987A. We also show that the extent of mixing for explosive burning products depends sensitively on the angular profile of the velocity asymmetry and can be much more extensive than previously assumed.

39 pages, 18 figures, submitted to ApJ Version with high resolution figures can be found at http://qso.lanl.gov/~clf

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• The Sgr B2 X-ray Echo of the Galactic Center Supernova Explosion that Produced Sgr A East
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• Dependence of Dust Formation on the Supernova Explosion
• X-Ray and Gamma-Ray Emission From Core-collapse Supernovae: Comparison of Three-dimensional Neutrino-driven Explosions With SN 1987A
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• Gamma-rays from kilonovae and the cosmic gamma-ray background
• Tracing the ejecta structure of SN 1987A: Insights and diagnostics from 3D MHD simulations