Effects of Thermal Conduction on the X-Ray and Synchrotron Emission from Supernova Remnants
Effects of Thermal Conduction on the X-Ray and Synchrotron Emission from Supernova Remnants
复制标题
热传导对超新星遗迹 X 射线和同步加速器发射的影响
DOI：
10.1086/380755
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
E. Giacani
中科院分区：
文献类型：
--
作者：
P. Velázquez;J. Martinell;A. Raga;E. Giacani
为了解释为什么复合超新星遗迹（SNRs）在射电连续体中具有壳状形态，而它们的x射线发射在中心达到峰值，已经研究了几种物理机制。其中一个被提出的机制是热传导的存在，它可以提高信噪比中心的密度，增加这些区域的x射线发射。本文采用自适应网格Yguazú-a代码进行了轴对称数值模拟，其中包括磁场平流和热传导。我们考虑了各向异性和各向同性热传导以及无传导的情况。我们从数值模拟中模拟了x射线（以及无线电同步加速器）发射图，可以直接与观测结果进行比较。
Several physical mechanisms have been studied in order to explain why composite supernova remnants (SNRs) have shell-like morphologies in the radio continuum while their X-ray emission is centrally peaked. One of the proposed mechanisms has been the presence of thermal conduction, which can raise the density at the center of SNRs, increasing the X-ray emission from these regions. In this work, we have carried out axisymmetric numerical simulations with the adaptive grid Yguazú-a code, which includes advection of the magnetic field and thermal conduction. We have considered cases with anisotropic and isotropic thermal conduction, as well as with no conduction. We have simulated X-ray (as well as radio synchrotron) emission maps from our numerical simulations, which can be directly compared with observations.