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
中科院分区:
文献类型:
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作者:
Chad Henshaw;R. O’Shaughnessy;L. Cadonati
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.