Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21511201s&link_type=abstract
American Astronomical Society, AAS Meeting #215, #112.01; Bulletin of the American Astronomical Society, Vol. 42, p.562
Other
Scientific paper
Observational studies of supernova (SN) explosions over more than a century have focused almost exclusively on the strong optical emission that dominates the bolometric luminosity. Yet many of the leading breakthroughs in our understanding of SNe and their progenitor systems have been enabled by observations at other wavelengths. In this talk I will describe some of these observations. For example, through a combination of radio and gamma-ray observations, we now know that about 0.2 percent of all core-collapse have the ability to power relativistic gamma-ray burst jets (GRBs). With the recent serendipitous discovery of shock breakout X-ray emission from an ordinary SN, we find a superior discovery technique for core-collapse SNe, as well as a way to probe the properties of the progenitor star up to the moment of explosion. Finally, as thermonuclear Type Ia SN studies are pushed toward higher redshift and are trusted to constrain the expansion history of the Universe, the favored single-degenerate progenitor model is increasingly called into question by sensitive radio and X-ray observations that have yet to reveal any evidence for a non-degenerate companion star. Theoretical considerations suggest that progenitor mass, metallicity, angular momentum and binary interaction all play a role in the observed properties of SNe and GRBs across the electromagnetic spectrum. I will discuss a fresh approach to bridging observations and theory of cosmic explosions with an ultimate goal of shedding light on the nature of their progenitors, the physics of the explosions, and a better understanding of their utility as high redshift probes.
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