The Supernova Gamma-Ray Burst Connection

Details The Supernova Gamma-Ray Burst Connection The Supernova Gamma-Ray Burst Connection

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20716801w&link_type=abstract

American Astronomical Society Meeting 207, #168.01; Bulletin of the American Astronomical Society, Vol. 37, p.1426

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There is now clear evidence for Type I supernovae happening in coincidence with two long soft gamma-ray bursts (GRBs) and compelling observations that suggest this may be a common occurrence. At the same time, it is clear that only a small fraction, 1%, of supernovae make GRBs. Why do some stars die one way, and others, another? I will argue that GRBs are the deaths of stars which die with unusually large amounts of rotation in their inner 3 solar masses. Models that produce slowly rotating pulsars most of the time and GRBs, in rare cases, especially in regions of low metallicity, will be presented. I will also discuss models for the central engine of GRBs, with emphasis on the collapsar model, and observable diagnostics to help distinguish these models. Finally, I will discuss transition events like SN 2005bf, which probably was not a GRB at any angle, but may have involved the same central engine.
This research was supported by the NSF, NASA, and the DOE.

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