论文标题
裂谷参数估计算法中的广义进动参数的实现
Implementation of a generalized precession parameter in the RIFT parameter estimation algorithm
论文作者
论文摘要
自2015年最初发现引力波以来，已经对紧凑型二进制源参数的波形解释和估计进行了重大发展。我们在此提出了一个广义进动参数$ \langleχ_p\ rangle $的实现，该$ $ \ rangle $在裂谷参数估计框架内平均在分进时间尺度上平均。相对于最初提供的进动参数$χ_p$，该参数表征了二进制中最大的动力学旋转，此新参数$ \ langleχ_p\ rangle $具有独特的域$ 1 <\ langleχ_p\ rangleχ_p\ rangle <2 $，这对于BINAIRE <2 $，这是两个带有prosessing spins的Binaries的独家。在审查了这两个参数之间的物理差异之后，我们描述了$ \ langleχ_p\ rangle $在Rift中如何实现，并将其应用于高级Ligo和Advanced Pirgo第三操作（O3B）的下半年的所有36个事件（O3B）。在O3B中，十个事件显示了大量的进动$ \langleχ_p\ rangle> 0.5 $。特别感兴趣的是GW191109_010717;我们显示它具有$ \ sim28 \％$ $概率，该概率必须包含两个未对准的旋转。
Since the initial discovery of gravitational waves in 2015, significant developments have been made towards waveform interpretation and estimation of compact binary source parameters. We present herein an implementation of the generalized precession parameter $\langle χ_p \rangle$, which averages over all angular variations on the precession timescale, within the RIFT parameter estimation framework. Relative to the originally-proposed precession parameter $χ_p$, which characterizes the single largest dynamical spin in a binary, this new parameter $\langle χ_p \rangle$ has a unique domain $1 < \langle χ_p \rangle < 2$, which is exclusive to binaries with two precessing spins. After reviewing the physical differences between these two parameters, we describe how $\langle χ_p \rangle$ was implemented in RIFT and apply it to all 36 events from the second half of the Advanced LIGO and Advanced Virgo third operating run (O3b). In O3b, ten events show significant amounts of precession $\langle χ_p \rangle > 0.5$. Of particular interest is GW191109_010717; we show it has a $\sim28\%$ probability that the originating system necessarily contains two misaligned spins.
