Circular polarizations of gravitational waves from core-collapse supernovae: A clear indication of rapid rotation
Circular polarizations of gravitational waves from core-collapse supernovae: A clear indication of rapid rotation
复制标题
核心塌陷超新星引力波的圆偏振：快速旋转的明确迹象
DOI：
10.1103/physrevlett.116.151102
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发表时间：
2016
影响因子：
8.6
通讯作者：
K. Nakamura and S. Yamada
中科院分区：
文献类型：
--
作者：
K. Hayama;T. Kuroda;K. Nakamura and S. Yamada
我们建议使用核心崩塌超新星发出的引力波的圆极化作为其核心在崩塌前的深部快速旋转的明确指示。三维模拟表明，非轴对称吸积流可以通过反弹后岩心的流体动力学不稳定性自发发展。因此，这种流体运动发出的引力波被圆偏振也就不足为奇了。在这封信中，我们表明，世界范围内的第二代引力波探测器网络可能能够探测到银河系另一侧的这种极化，只要核心的自转周期短于崩溃前的几秒。
We propose to employ the circular polarization of gravitational waves emitted by core-collapse supernovae as an unequivocal indication of rapid rotation deep in their cores just prior to collapse. It has been demonstrated by three dimensional simulations that nonaxisymmetric accretion flows may develop spontaneously via hydrodynamical instabilities in the postbounce cores. It is not surprising, then, that the gravitational waves emitted by such fluid motions are circularly polarized. We show, in this Letter, that a network of the second generation detectors of gravitational waves worldwide may be able to detect such polarizations up to the opposite side of the Galaxy as long as the rotation period of the core is shorter than a few seconds prior to collapse.