非相干同步辐射射电源的最高亮温
Maximum brightness temperature for an incoherent synchrotron radio source
摘要：
本文讨论了非相干同步辐射源的最大亮温极限。这个极限，在文献中通常被称为逆康普顿极限，规定非相干同步辐射源的亮度温度不能超过~10^{12} K，这是从观测中得知的事实。然而，如果采用同步辐射源中磁场和相对论性粒子的能量均分条件，则可以得到与逆康普顿效应无关的亮度温度T_{b} ~10^{11.5} K的更严格限制。讨论了两种亮温限值的利弊。
英文摘要：
We discuss here a limit on the maximum brightness temperature achievable for an incoherent synchrotron radio source. This limit, commonly referred to in the literature as an inverse Compton limit, prescribes that the brightness temperature for an incoherent synchrotron radio source may not exceed ~10^{12} K, a fact known from observations. However one gets a somewhat tighter limit on the brightness temperatures, T_{b}~10^{11.5} K, independent of the inverse Compton effects, if one employs the condition of equipartition of energy in magnetic fields and relativistic particles in a synchrotron radio source. Pros and cons of the two brightness temperature limits are discussed.
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