X- and gamma-ray Burst Signatures of Thermonuclear Supernovae

Details X- and gamma-ray Burst Signatures of Thermonuclear Supernovae X- and gamma-ray Burst Signatures of Thermonuclear Supernovae

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sgrb.confe..26h&link_type=abstract

Presented at the KITP Conference: Supernova and Gamma-Ray Burst Remnants, Feb 10, 2006, Kavli Institute for Theoretical Physics,

Physics

Scientific paper

The X-ray and gamma -ray burst signatures of Thermonuclear Supernovaeare studied. We identify two potential mechanisms: The breakout of thethermonuclear burning front, and the interaction of the rapidly expandingenvelope with material within (!) the progenitor system. Our study isbased on the delayed detonation scenario because this can account for themajority of light curves, spectra and statistical properites of'Branch-normal' SNe Ia. Based on detailed radiation-hydro calculationwhich include nuclear networks, we find, for both mechanisms, peakluminosities of the order of 10(50) erg/sec and fringe-like lightcurves with time scales of a few tenth and a fewseconds, respectivly. Whereas the breakout will produce radiation mainlyin the X- and soft-gamma ray range, typical energies in the second caseare higher by an order of magnitude. In general, we expect a fast rise andslow decline and, after the peak, an evolution fromhard to softer radiation due to adiabatic expansion. We discuss the detection (or limits) of X- and gamma -rays for SNe Iaas diagnosticaltools to decipher the explosion physics and the nature of the progenitorsystem. We present a statistical analysis of historic GRB data and thecorrelation with known SNe Ia. The results are suggestive that SNe Ia maycontribute to the population of short X-ray and GRBs.

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