The LIGO and Virgo gravitational-wave detectors carried out the first half of their third observing run from April through October 2019. During this period, they detected 39 new signals from the coalescence of black holes or neutron stars, more than quadrupling the total number of detected events. These detections included some unprecedented sources, like a pair of black holes with unequal masses (GW190412), a massive pair of neutron stars (GW190425), a black hole potentially in the supernova pair-instability mass gap (GW190521), and either the lightest black hole or the heaviest neutron star known to date (GW190814). Collectively, the full set of signals provided astrophysically valuable information about the distributions of compact objects and their evolution throughout cosmic history. It also enabled more constraining and diverse tests of general relativity, including new probes of the fundamental nature of black holes. This review summarizes the highlights of these results and their implications.

中文翻译：

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最近的 LIGO-Virgo 发现

LIGO 和 Virgo 引力波探测器从 2019 年 4 月到 2019 年 10 月进行了第三次观测的前半部分。在此期间，他们从黑洞或中子星的合并中探测到了 39 个新信号，是黑洞或中子星合并的四倍多。检测到的事件。这些探测包括一些前所未有的来源，例如一对质量不等的黑洞（GW190412）、一对大质量的中子星（GW190425）、一个可能位于超新星对不稳定质量间隙中的黑洞（GW190521），以及最轻的黑洞。黑洞或迄今为止已知的最重的中子星（GW190814）。总的来说，全套信号提供了有关致密物体分布及其在整个宇宙历史中的演化的天体物理学有价值的信息。它还能够对广义相对论进行更多约束和多样化的测试，包括对黑洞基本性质的新探测。本综述总结了这些结果的亮点及其影响。