...
首页> 外文期刊>The Astrophysical journal >MAGNETOHYDRODYNAMIC SIMULATIONS OF SHOCK INTERACTIONS WITH RADIATIVE CLOUDS
【24h】

MAGNETOHYDRODYNAMIC SIMULATIONS OF SHOCK INTERACTIONS WITH RADIATIVE CLOUDS

机译:辐射云与激波相互作用的磁流体动力学模拟

获取原文
获取原文并翻译 | 示例

摘要

We present results from two-dimensional numerical simulations of the interactions between magnetized shocks and radiative clouds. Our primary goal is to characterize the dynamical evolution of the shocked clouds. We perform runs in both the strong and weak magnetic field limits and consider three different field orientations. For the geometries considered, we generally find that magnetic fields external to, but concentrated near, the surface of the cloud suppress the growth of destructive hydrodynamic instabilities. External fields also increase the compression of the cloud by effectively acting as a confinement mechanism driven by the interstellar flow and local field stretching. This can have a dramatic effect on both the efficiency of radiative cooling, which tends to increase with increasing magnetic field strength, and on the size and distribution of condensed cooled fragments. In contrast, fields acting predominately internally to the cloud tend to resist compression, thereby inhibiting cooling. We observe that, even at modest strengths (β_0 approx< 100), internal fields can completely suppress low-temperature (T < 100 K) cooling in two-dimensional clouds.
机译:我们提出了磁化冲击与辐射云之间相互作用的二维数值模拟结果。我们的主要目标是表征冲击云的动态演化。我们在强磁场和弱磁场极限条件下进行运行,并考虑三种不同的磁场方向。对于所考虑的几何形状,我们通常会发现,在云表面外部但集中在云表面附近的磁场抑制了破坏性水动力不稳定性的增长。外场通过有效地充当由星际流和局部场伸展驱动的限制机制,也增加了云的压缩。这会对辐射冷却的效率(随着磁场强度的增加而趋于增加)以及冷凝的冷却碎片的大小和分布产生巨大影响。相反,主要作用于云内部的场倾向于抵抗压缩,从而抑制冷却。我们观察到,即使强度适中(β_0约<100),内部磁场也可以完全抑制二维云中的低温(T <100 K)冷却。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号