Excitation of magnetohydrodynamic modes with gravitational waves: A testbed for numerical codes
Excitation of magnetohydrodynamic modes with gravitational waves: A testbed for numerical codes
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DOI：
10.1103/physrevd.72.024029
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发表时间：
2005-03
影响因子：
5
通讯作者：
Matthew D. Duez;Yuk Tung Liu;S. Shapiro;B. Stephens
中科院分区：
文献类型：
--
作者：
Matthew D. Duez;Yuk Tung Liu;S. Shapiro;B. Stephens
我们考虑在初始均匀的磁化流体中振荡的引力波。流体是完全导电的和等熵的，并且磁场最初是均匀的。我们找到解析解的情况下，引力波是线性的，不受背景流体和字段。我们的解决方案显示了引力波如何激发流体中的三种磁流体动力学（MHD）模式：Alfven波，以及快速和慢速磁声波。我们的解析解是特别有用的测试数值代码，旨在治疗广义相对论MHD动力学时空中，我们证明了在配套文件。
We consider a gravitational wave oscillating in an initially homogeneous, magnetized fluid. The fluid is perfectly conducting and isentropic, and the magnetic field is initially uniform. We find analytic solutions for the case in which the gravitational wave is linear and unaffected by the background fluid and field. Our solutions show how gravitational waves can excite three magnetohydrodynamic (MHD) modes in the fluid: Alfven waves, and both fast and slow magnetosonic waves. Our analytic solutions are particularly useful for testing numerical codes designed to treat general relativistic MHD in dynamical spacetimes, as we demonstrate in a companion paper.