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arXiv · 0705.3958

Photon Acceleration at Shock Breakout of Trans-Relativistic Supernova

Zhuo Li·Xiang-Yu Wang·Eli Waxman·Peter Meszaros
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Abstract

The predicted thermal flash from SN shock breakout might have been detected for the first time by Swift in GRB 060218/SN 2006aj. The detected thermal X-ray emission in this event implies emergence of a trans-relativistic (TR) SN shock with kinetic energy of E_k>1E49 erg. During TRSN shock breakout, the thermal photons could be "accelerated" by the shock through repeated bulk Compton scattering, forming a nonthermal gamma/X-ray component with dominant energy over thermal one. This mechanism of "photon acceleration" at TRSN shock breakout might also account for gamma-rays in the other similar low-luminosity GRBs, implying that they are atypical GRBs with only TR outflows. TRSNe form a peculiar type of SNe with large kinetic energy, >1E49 erg, in TR ejecta, Γβ~2.

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Zhuo Li, Xiang-Yu Wang, Eli Waxman, Peter Meszaros. 2007-05-28. Photon Acceleration at Shock Breakout of Trans-Relativistic Supernova. https://arxiv.org/abs/0705.3958

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