A new mechanism for gravitational-wave emission in core-collapse supernovae.
A new mechanism for gravitational-wave emission in core-collapse supernovae.
复制标题
核心塌陷超新星中引力波发射的新机制。
DOI：
10.1103/physrevlett.96.201102
复制
发表时间：
2006
影响因子：
8.6
通讯作者：
E. Livne
中科院分区：
文献类型：
--
作者：
C. Ott;A. Burrows;L. Dessart;E. Livne
我们提出了一个新的理论的核心坍缩超新星的引力波签名。以往的研究确定轴对称旋转的核心崩溃，核心反弹，postbounce对流，各向异性中微子发射的引力波辐射的主要过程和阶段。基于轴对称牛顿超新星模拟的结果表明，在核坍缩超新星中，引力波的主要发射过程可能是质子中子星星核的振荡。振荡主要具有模式特征，在反弹后数百毫秒被激发，并且通常持续数百毫秒。我们的研究结果表明，即使是非旋转的核心坍缩超新星也应该在整个银河系的LIGO级探测器上可见，并且取决于祖先的结构，可能达到百万秒差距的距离。
We present a new theory for the gravitational-wave signatures of core-collapse supernovae. Previous studies identified axisymmetric rotating core collapse, core bounce, postbounce convection, and anisotropic neutrino emission as the primary processes and phases for the radiation of gravitational waves. Our results, which are based on axisymmetric Newtonian supernova simulations, indicate that the dominant emission process of gravitational waves in core-collapse supernovae may be the oscillations of the protoneutron star core. The oscillations are predominantly of mode character, are excited hundreds of milliseconds after bounce, and typically last for several hundred milliseconds. Our results suggest that even nonrotating core-collapse supernovae should be visible to current LIGO-class detectors throughout the Galaxy, and depending on progenitor structure, possibly out to megaparsec distances.