The gravitational afterglow of boson stars
The gravitational afterglow of boson stars
复制标题
玻色子星的引力余辉
DOI：
10.1088/1361-6382/acace4
复制
发表时间：
2023
影响因子：
3.5
通讯作者：
Clough, Katy
中科院分区：
文献类型：
--
作者：
Croft, Robin;Helfer, Thomas;Ge, Bo-Xuan;Radia, Miren;Evstafyeva, Tamara;Lim, Eugene A.;Sperhake, Ulrich;Clough, Katy
在这项工作中，我们研究了玻色子星双星合并后的长寿命引力波签名。我们使用完整的数值相对论来模拟合并后的引力余辉，并在很长一段时间内跟踪。我们实施了最近的创新的二进制初始数据，显着减少虚假的初始激发的标量场分布，以及测量角动量，使我们能够跟踪的空间体积的总动量，包括曲率的贡献。至关重要的是，我们发现余辉持续的时间比自旋下降的时间长得多。这种延长的引力波余辉提供了一种特征信号，可以将其与其他天体物理来源区分开来。
In this work we study the long-lived post-merger gravitational wave signature of a boson-star binary coalescence. We use full numerical relativity to simulate the post-merger and track the gravitational afterglow over an extended period of time. We implement recent innovations for the binary initial data, which significantly reduce spurious initial excitations of the scalar field profiles, as well as a measure for the angular momentum that allows us to track the total momentum of the spatial volume, including the curvature contribution. Crucially, we find the afterglow to last much longer than the spin-down timescale. This prolonged gravitational wave afterglow provides a characteristic signal that may distinguish it from other astrophysical sources.