Li 2007 跨相对论超新星Shock Breakou处的逆康普顿散射

主要内容:
主要针对GRB 060218/SN 2006aj， 在Breakout的地方的热光子被激波化电子逆康普顿散射，产生观测到的伽玛暴辐射。

精彩摘抄:


文章信息:
arXiv:0705.3958 [ps, pdf, other] : Title: Photon Acceleration at Shock Breakout of Trans-Relativistic Supernova
Authors: Zhuo Li, Xiang-Yu Wang, Eli Waxman, Peter Meszaros
Comments: 5 pages, 2 figs, talk at Amsterdam 2007 GRB meeting. No figs in the version for the proceedings "070228: The Next Decade of Gamma-Ray Burst Afterglows", eds. Wijers, R.A.M.J., Kaper, L, and van Eerten, H.J., Elsevier (Amsterdam)

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, \Gamma\beta ~2.