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arXiv 2109.09718astro-ph.HEgr-qc
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用开放的引力波星表检验引力波双折射

Tests of Gravitational-Wave Birefringence with the Open Gravitational-Wave Catalog

Yi-Fan Wang, Stephanie M. Brown, Lijing Shao, Wen Zhao

摘要:

我们报告的结果测试引力波双折射使用最大的人口的引力波事件目前可用。广义相对论的有效场论扩展可以引起引力波双折射,当宇称对称性被破坏时,会发生这种现象,导致左手和右手偏振按照不同的运动方程传播。我们使用宇称违反波形对第四开放引力波目录(4-OGC)报告的94个事件进行贝叶斯推断。我们在绝大多数事件中找不到违反广义相对论的证据。然而,质量最大的事件GW 190521和第二大事件GW 191109显示出引力波双折射的有趣的非零结果。我们发现,GW 190521和Zwicky瞬态设施(ZTF)报告的可能的电磁(EM)对应物之间的关联的概率增加时,假设双折射。不包括GW 190521和GW 191109,宇称违反的能量尺度被限制到$M_\mathrm{PV} > 0.05$ GeV在$90\%$可信的间隔,这是一个改进,以前的结果从十二个事件的一个因素。我们讨论了我们的研究结果的影响修改重力和可能的替代解释,如波形系统学。即将到来的LIGO/Virgo/KAGRA运行中对大规模双黑洞合并的更多探测将揭示表观双折射的真正起源。

英文摘要:

We report the results of testing gravitational-wave birefringence using the largest population of gravitational-wave events currently available. Gravitational-wave birefringence, which can arise from the effective field theory extension of general relativity, occurs when the parity symmetry is broken, causing the left- and right-handed polarizations to propagate following different equations of motion. We perform Bayesian inference on the 94 events reported by the 4th-Open Gravitational-wave Catalog (4-OGC) using a parity-violating waveform. We find no evidence for a violation of general relativity in the vast majority of events. However, the most massive event, GW190521, and the second most massive event, GW191109, show intriguing non-zero results for gravitational-wave birefringence. We find that the probability of association between GW190521 and the possible electromagnetic (EM) counterpart reported by Zwicky Transient Facility (ZTF) is increased when assuming birefringence. Excluding GW190521 and GW191109, the parity-violating energy scale is constrained to $M_\mathrm{PV} > 0.05$ GeV at $90\%$ credible interval, which is an improvement over previous results from twelve events by a factor of five. We discuss the implications of our results on modified gravity and possible alternative explanations such as waveform systematics. More detections of massive binary black hole mergers from the upcoming LIGO/Virgo/KAGRA run will shed light on the true origin of the apparent birefringence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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