无线电与X射线的结合：SN 1993 J的修正模型
Joining radio with X-rays: A revised model for SN 1993J
摘要：
对SN 1993 J的射电和X射线观测资料进行了联合分析。有人认为，无论是同步辐射冷却背后的前冲击波，也没有热冷却背后的反向冲击波是由观测支持。为了使绝热模型是一致的，在最初的几百天内，需要重新解释空间分辨VLBI源的半径。它不是反映前向激波的位置，而是与从接触不连续性产生的瑞利-泰勒不稳定区的扩展相联系。虽然观测结果表明磁场和相对论性电子的能量密度之间有一个恒定的比例，但它们似乎并不与前向激波后面的热能密度单独成比例;相反，在绝热模型中，磁场强度的演化最好理解为与超新星半径成反比。
英文摘要：
A joint analysis is done of the radio and X-ray observations of SN 1993J. It is argued that neither synchrotron cooling behind the forward shock nor thermal cooling behind the reverse shock is supported by observations. In order for adiabatic models to be consistent, a reinterpretation of the radius of the spatially resolved VLBI-source is needed during the first few hundred days. Instead of reflecting the position of the forward shock, it is then associated with the expansion of the Rayleigh-Taylor unstable region emanating from the contact discontinuity. Although observations imply a constant ratio between the energy densities in magnetic fields and relativistic electrons, they do not appear to scale individually with the thermal energy density behind the forward shock; rather, in adiabatic models, the evolution of the magnetic field strength is best understood as scaling inversely with the supernova radius.
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