论文标题
同时在重力偶极辐射上的边界和紧凑型二元灵感的重力常数变化
Simultaneous bounds on the gravitational dipole radiation and varying gravitational constant from compact binary inspirals
论文作者
论文摘要
紧凑型二进制文件是一类重要的重力波（GW）来源，可以通过当前和未来的GW观测值检测到。它们为高度动态的强场状态提供了一般相对论（GR）的测试床。在这里，我们使用来自灵感的二进制中子星和二进制黑孔的GW来研究偶极重力辐射（DGR），并通过某些替代理论预测的GR（例如标量调节引力）预测的重力常数。在参数化的后源后框架中，我们同时将这两种效应的参数化引入紧凑型二进制二进制文件的灵感波形，并执行Fisher-Information-Matrix分析以估计它们的同时界限。通常，基于空间的GW探测器比地面探测器可以给出更高的限制。对于DGR参数$ b $和$σ_{\ dot {g}}/g <7 \ 7 \ times10^{ - 9} { - 9} { - {\ rm yr}^{ - rm yr}^{ - 1} $ g $ g $ g $ g $ g $ g $ g $ g $ g $ g $ g $ g $ g $ g $ g $，空间探测器。此外，我们分析了这两种效果之间的相关性，并强调了考虑这两种效果以取得更现实的结果的重要性。
Compact binaries are an important class of gravitational-wave (GW) sources that can be detected by current and future GW observatories. They provide a testbed for general relativity (GR) in the highly dynamical strong-field regime. Here, we use GWs from inspiraling binary neutron stars and binary black holes to investigate dipolar gravitational radiation (DGR) and varying gravitational constant predicted by some alternative theories to GR, such as the scalar-tensor gravity. Within the parametrized post-Einsteinian framework, we introduce the parametrization of these two effects simultaneously into compact binaries' inspiral waveform and perform the Fisher-information-matrix analysis to estimate their simultaneous bounds. In general, the space-based GW detectors can give a tighter limit than ground-based ones. The tightest constraints can reach $σ_B<3\times10^{-11}$ for the DGR parameter $B$ and $σ_{\dot{G}}/G < 7\times10^{-9} \, {\rm yr}^{-1} $ for the varying $G$, when the time to coalescence of the GW event is close to the lifetime of space-based detectors. In addition, we analyze the correlation between these two effects and highlight the importance of considering both effects in order to arrive at more realistic results.
