超相对论超新星爆发时的光子加速
Photon Acceleration at Shock Breakout of Trans-Relativistic Supernova
摘要：
预测的SN冲击爆发的热闪光可能是雨燕在GRB 060218/SN 2006 aj中首次探测到的。在这次事件中探测到的热X射线辐射意味着一个动能E_k> 1 E49 erg的跨相对论SN激波的出现。在TRSN冲击爆发期间，热光子可以通过重复的体康普顿散射被冲击“加速”，形成能量占主导地位的非热伽马/X射线分量。TRSN激波爆发时的这种“光子加速”机制也可以解释其他类似低光度GRB中的伽马射线，这意味着它们是只有TR流出的非典型GRB。TRSNe在TR喷出物中形成一种特殊类型的SNe，具有大动能，> 1 E49 erg。
英文摘要：
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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