Relationship between Bondi–Sachs quantities and source of gravitational radiation in asymptotically de Sitter spacetime
Relationship between Bondi–Sachs quantities and source of gravitational radiation in asymptotically de Sitter spacetime
复制标题
渐进德西特时空中邦迪萨克斯量与引力辐射源之间的关系
DOI：
10.1142/s0218271818500463
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发表时间：
2017
影响因子：
2.2
通讯作者：
Zhoujian Cao （曹周键）
中科院分区：
文献类型：
--
作者：
Xiaokai He （何孝凯）;Jiliang Jing （荆继良）;Zhoujian Cao （曹周键）
引力辐射在天体物理学中扮演着重要的角色。基于我们的宇宙正在膨胀这一事实，最近人们用两种不同的方法来研究宇宙正常数时的引力辐射，一种是用渐近零结构中的BS量来表示结果的Bondi-Sachs(BS)框架，另一种是用源的四极来表示结果的微扰方法。因此，用源的信息来解释渐近零结构中的量是很有价值的。本文研究了这一问题，得到了渐近de Sitter时空中源的四极子项的BS量的显式表达式。我们还估计了源的距离，宇宙常数可能会影响引力波的探测。
Gravitational radiation plays an important role in astrophysics. Based on the fact that.our universe is expanding, the gravitational radiation when a positive cosmological constant.is presented has been studied along with two different ways recently, one is the.Bondi–Sachs (BS) framework in which the result is shown by BS quantities in the asymptotic.null structure, the other is the perturbation approach in which the result is presented.by the quadrupoles of source. Therefore, it is worth to interpret the quantities.in asymptotic null structure in terms of the information of the source. In this paper,.we investigate this problem and find the explicit expressions of BS quantities in terms.of the quadrupoles of source in asymptotically de Sitter spacetime. We also estimate.how far away the source is, the cosmological constant may affect the detection of the.gravitational wave.