Reconstructing gravitational wave signals from binary black hole mergers with minimal assumptions
Reconstructing gravitational wave signals from binary black hole mergers with minimal assumptions
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DOI：
10.1103/physrevd.102.064056
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发表时间：
2020-03
影响因子：
5
通讯作者：
S. Ghonge;K. Chatziioannou;J. Clark;T. Littenberg;M. Millhouse;L. Cadonati;N. Cornish
中科院分区：
文献类型：
--
作者：
S. Ghonge;K. Chatziioannou;J. Clark;T. Littenberg;M. Millhouse;L. Cadonati;N. Cornish
本文系统比较了LIGO和Virgo信号源推断中使用的两种独立和互补的方法重建的双黑洞（BBH）信号波形：基于模板的分析和与形态无关的分析。我们将这两种方法应用于真实事件和两组模拟观测，通过将模拟BBH信号添加到LIGO和Virgo探测器噪声中。第一组是首个引力波瞬变目录（GWTC-1）中10个BBH事件的代表。第二组是由一群BBH系统组成的，它们的总质量和信号强度都在地面探测器通常敏感的范围内。我们发现GWTC-1事件的重建质量与两组模拟信号的结果一致。我们还演示了一个模拟案例，其中观察到的信号中存在错误建模效应，即高阶模式，可以通过形态无关分析来识别。这项研究与LIGO和Virgo目前的进展和未来的观测运行有关。
We present a systematic comparison of the binary black hole (BBH) signal waveform reconstructed by two independent and complementary approaches used in LIGO and Virgo source inference: a template-based analysis, and a morphology-independent analysis. We apply the two approaches to real events and to two sets of simulated observations made by adding simulated BBH signals to LIGO and Virgo detector noise. The first set is representative of the 10 BBH events in the first Gravitational Wave Transient Catalog (GWTC-1). The second set is constructed from a population of BBH systems with total mass and signal strength in the ranges that ground based detectors are typically sensitive. We find that the reconstruction quality of the GWTC-1 events is consistent with the results of both sets of simulated signals. We also demonstrate a simulated case where the presence of a mismodelled effect in the observed signal, namely higher order modes, can be identified through the morphology-independent analysis. This study is relevant for currently progressing and future observational runs by LIGO and Virgo.