模拟超新星残骸中各向异性热导：I. 数值方法与残骸演化
摘要
各向异性热导在各种天体物理系统中发挥着重要作用。其中最严格的热导测试之一可在超新星残骸中找到。在本文中，我们研究了各向异性热导，探讨了热导通量在经典和饱和极限中的物理本质。我们还提出了一种在数值 MHD 框架中用于热导项时间更新的二阶准隐式-显式方案。 presented for a range of ISM parameters. Several simulations of supernova remnants are presented for a range of ISM parameters. The role of thermal conduction in such remnants has been studied. We find that thermal conduction produces cooler temperatures and higher densities in the hot gas bubbles that form in the remnants. The effect of thermal conduction in changing the thermal characteristics of the hot gas bubble increases as the remnant propagates through denser ISMs. Remnants evolving in denser ISMs are shown to make a faster transition to a centre-bright x-ray morphology, with the trend emerging earlier in hard x-rays than in the soft x-rays.
引用
@article{arxiv.astro-ph/0606031,
title = {Simulating Anisotropic Thermal Conduction in Supernova Remnants I : Numerics and the Evolution of Remnants},
author = {D. S. Balsara and D. A. Tilley and J. C. Howk},
journal= {arXiv preprint arXiv:astro-ph/0606031},
year = {2007}
}