AI 中文总结
研究 LIGO-Virgo-KAGRA O４a 观测运行中双黑洞合并触发事件，用贝叶斯参数推断分析，发现部分触发事件可能含亚太阳质量成分，还研究了其他相关触发事件及数据质量，探讨了含亚太阳质量成分事件参数估计面临的挑战。
AI 中文摘要
LIGO-Virgo-KAGRA 合作组织报告了在 O4a 观测运行期间紧凑双星合并中亚太阳质量成分的搜索结果。未识别出检测候选者，但报告了最显著的七个触发事件。我们展示了对这些触发事件的贝叶斯参数推断结果。五个触发事件在贝叶斯参数估计和搜索管道触发之间显示出一致性。结果表明三个触发事件可能包含可能的亚太阳质量成分。参数估计表明另外两个事件若是真实的，将是中子星 - 黑洞双星。其余两个触发事件未提供信息丰富的参数估计。我们还研究了其他三个团队指出的三个 O4a 紧凑双星合并触发事件和一个 O3 触发事件，参数估计表明其中三个可能包含亚太阳质量成分。我们研究了与这些触发事件相关的数据质量。最后，我们讨论了在包含亚太阳质量成分的紧凑双星合并事件中进行参数估计的挑战：信号持续时间长、可能的小啁啾质量、可能的小质量比以及潜在数百秒数据上的数据质量问题。
英文摘要
The LIGO-Virgo-KAGRA collaboration has reported the results for searches for sub-solar mass components in compact binary coalescence during observing run O4a. No detection candidates were identified, but the most significant seven triggers were reported. We present the results of Bayesian parameter inference on these triggers. Five of the triggers show agreement between the Bayesian parameter estimation and the search pipeline trigger. Our results show that three of the triggers may contain a possible sub-solar mass component. Parameter estimation indicates that the other two events, if real, would be neutron star - black hole binaries. The remaining two triggers do not provide informative parameter estimation. We also study three O4a compact binary coalescence triggers, and one O3 trigger, that have been noted by three other groups, and our parameter estimation indicates that three of these may contain a sub-solar mass component. We study the data quality associated with these triggers. Finally, we discuss the challenges for parameter estimation on compact binary coalescence events containing a sub-solar mass component: long signal duration, possible small chirp masses, possible small mass ratios, and data quality issues over potentially hundreds of seconds of data.
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