论文标题
脉冲星风云的回响（i）：培养基和其他参数对压缩程度的影响
Reverberation of pulsar wind nebulae (I): Impact of the medium properties and other parameters upon the extent of the compression
论文作者
论文摘要
Pulsar风星云（PWNE）长期演变的标准方法基于将星云视为均匀系统的单区模型。特别是对于进化系统的后期阶段，许多普遍的处方都是基于适当评估缺乏的有根据的猜测。使用高级辐射代码，我们评估了各种参数的系统影响，例如pWNE的回响阶段的范围，内部脉冲星的超新星弹射器的性质以及环境培养基的性能。我们研究了不同的处方如何改变混响阶段的启动时间，这如何影响压缩量以及其中多少可以归因于辐射过程。一些关键方面是对反向冲击演化的描述，即以后从喷射材料积聚到PWN周围扫荡的壳上的效率，最后是周围超新星残留物中的密度，速度和压力曲线。我们已经明确处理了螃蟹星云的病例和J1834.9--0846的病例，分别是代表越来越少的脉冲星。特别是对于后一种对象，确认了大型压缩因子的预测，在辐射损失的情况下甚至更大，也证实了我们以前在某些pwne的混响阶段对超级效率时期的预测。
The standard approach to the long term evolution of pulsar wind nebulae (PWNe) is based on one-zone models treating the nebula as a uniform system. In particular for the late phase of evolved systems, many of the generally used prescriptions are based on educated guesses for which a proper assessment lacks. Using an advanced radiative code we evaluate the systematic impact of various parameters, like the properties of the supernova ejecta, of the inner pulsar, as well of the ambient medium, upon the extent of the reverberation phase of PWNe. We investigate how different prescriptions shift the starting time of the reverberation phase, how this affects the amount of the compression, and how much of this can be ascribable to the radiation processes. Some critical aspects are the description of the reverse shock evolution, the efficiency by which at later times material from the ejecta accretes onto the swept-up shell around the PWN, and finally the density, velocity and pressure profiles in the surrounding supernova remnant. We have explicitly treated the cases of the Crab Nebula, and of J1834.9--0846, taken to be representatives of the more and the less energetic pulsars, respectively. Especially for the latter object the prediction of large compression factors is confirmed, even larger in the presence of radiative losses, also confirming our former prediction of periods of super-efficiency during the reverberation phase of some PWNe.
