Implementation of a generalized precession parameter in the RIFT parameter estimation algorithm

Implementation of a generalized precession parameter in the RIFT parameter estimation algorithm
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DOI:
10.1088/1361-6382/ac6cc0
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发表时间:
2022-01
影响因子:
3.5
通讯作者:
Chad Henshaw;R. O’Shaughnessy;L. Cadonati
Chad Henshaw;R. O’Shaughnessy;L. Cadonati
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Chad Henshaw;R. O’Shaughnessy;L. Cadonati

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自2015年首次发现引力波以来,在波形解释和估计致密二元源参数方面取得了重大进展。我们在本文中提出了广义进动参数的实现[Gerosa等人2021],其在RIFT参数估计框架内对进动时间尺度上的所有角度变化进行平均。相对于描述双星中最大动力学自旋的旋进参数χ p,χ χ p有一个唯一的域1 0.5。特别令人感兴趣的是GW191109_010717;我们表明,起源系统必然包含两个未对准的自旋的概率为28%。
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 ⟨χ p⟩ [Gerosa et al 2021], which averages over all angular variations on the precession timescale, within the RIFT parameter estimation framework. Relative to the precession parameter χ p, which characterizes the single largest dynamical spin in a binary, ⟨χ p⟩ has a unique domain 1 0.5. Of particular interest is GW191109_010717; we show it has a ∼28% probability that the originating system necessarily contains two misaligned spins.