Probing fundamental physics with gravitational waves: The next generation
Probing fundamental physics with gravitational waves: The next generation
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DOI：
10.1103/physrevd.103.044024
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发表时间：
2020-10
影响因子：
5
通讯作者：
S. Perkins;N. Yunes;E. Berti
中科院分区：
文献类型：
--
作者：
S. Perkins;N. Yunes;E. Berti
紧凑的双星合并的引力波观测已经提供了严格的广义相对论测试和对修正引力的限制。陆基干涉探测器将很快达到设计灵敏度，紧随其后的是第三代升级，可能与天基探测器一起运行。这些改进将如何影响我们用引力波研究基础物理的能力？答案取决于仪器灵敏度升级的时间表，也取决于天体物理紧凑的双星种群不确定性，这些不确定性决定了观测到的源的数量和信噪比。我们考虑了探测器升级的拟议时间表和各种天体物理人口模型的几种情况。使用二元黑洞合并观测的堆叠Fisher矩阵分析，我们深入研究了广义相对论修正的未来理论不可知界以及特定理论的界。对于理论不可知界，我们发现，对恒星质量黑洞的地面观测和对大质量黑洞的LISA观测都可以导致相对于目前引力波约束的2-4个数量级的改进，而多波段观测可以产生1-6个数量级的改进。我们还阐明了理论不可知界和理论特定界之间的关系如何依赖于源性质。
Gravitational wave observations of compact binary mergers are already providing stringent tests of general relativity and constraints on modified gravity. Ground-based interferometric detectors will soon reach design sensitivity, and they will be followed by third-generation upgrades, possibly operating in conjunction with space-based detectors. How will these improvements affect our ability to investigate fundamental physics with gravitational waves? The answer depends on the timeline for the sensitivity upgrades of the instruments, but also on astrophysical compact binary population uncertainties, which determine the number and signal-to-noise ratio of the observed sources. We consider several scenarios for the proposed timeline of detector upgrades and various astrophysical population models. Using a stacked Fisher matrix analysis of binary black hole merger observations, we thoroughly investigate future theory-agnostic bounds on modifications of general relativity as well as bounds on specific theories. For theory-agnostic bounds, we find that ground-based observations of stellar-mass black holes and LISA observations of massive black holes can each lead to improvements of 2--4 orders of magnitude with respect to present gravitational wave constraints, while multiband observations can yield improvements of 1--6 orders of magnitude. We also clarify how the relation between theory-agnostic and theory-specific bounds depends on the source properties.