2017年06月02日:确知质量的黑洞-（Black Holes of Known Mass）

2017年06月02日:确知质量的黑洞-（Black Holes of Known Mass）--原图下载

Illustration Credit: LIGO, NSF, Aurore Simonnet (SonomaState U.)
说明: 把GW170104纳入确知质量的黑洞之列。这个由二颗较小质量黑洞合併所产生的极端高能事件，是雷射干涉仪重力波观测站 (LIGO)侦测到的第三个重力波讯号。这个刚找到的黑洞之质量是太阳的49倍，介于先前LIGO侦测到的二个合併黑洞：62倍太阳质量的GW150914和21倍太阳质量的GW151216之间。前面这三个事件的讯号，二部LIGO侦测器都能明确辨认是来自合併黑洞，但第四例（LVT151012）的可信度就较低。GW170104的估计距离在30亿光年左右，比GW150914 和GW151216目前的估计距离要远。这个时空涟漪（GW170104），是发现于现行、起始于2016年11月30日至今年夏天的LIGO观测期。

原文：

Illustration Credit: LIGO, NSF, Aurore Simonnet (SonomaState U.)
Explanation: AddGW170104 to the chart of black holes with known mass.The extremely energetic merger of two smallerblack holes corresponds to the Laser InterferometerGravitational-wave Observatory's(LIGO)third detection of gravitational waves.The newfound black hole has a mass about 49 timesthat of the Sun, filling a gap between the masses of the twomerged black holes detected previously by LIGO, with solar masses of 62(GW150914) and 21(GW151226). In all three cases, the signal in each of the twin LIGO detectors wasunambiguously identified as coming from black hole mergers while afourth case (LVT151012) resulted in a lower confidence detection.GW170104 is estimated to be some 3 billion light-years away,more distant than present estimates for GW150914 and GW151226.The ripplesin spacetimewere discovered during LIGO's current observing run,which began November 30, 2016 and will continue through the summer.