模拟:二颗黑洞的合并
模拟来源与版权:Simulating eXtreme Spacetimes Project

说明:请观赏二颗黑洞合并。受到2015年首次直接侦测到重力波的启发,而制作的这部慢速播放模拟影片,如果以真实速度播放大约只历时三分之一秒。位在宇宙舞台上的这二颗黑洞,座落在恒星、云气与尘埃的前方。随着它们盘旋接近最后合并在一起,它们极端强大的重力,把来自后方的光会聚成爱因斯坦环。而这些大质量天体快速合并时所产生的不可见重力波,造成爱因斯坦环内与外的可见光影像发生摇晃及溅泼,甚至持续到黑洞已经完全合并之后。这例编录号为GW150914的LIGO重力波侦测事件,与距离13亿光年远的36倍及31倍太阳质量黑洞合并之讯号吻合。它们合并之后,形成了一颗63倍太阳质量的黑洞,而其他的4个太阳质量,化为重力波能量。从那时候起,LIGO和VIRGO重力波天文台,已侦测到数个源自大质量系统的重力波事件,而在上星期,事件视界望远镜更发布了首张解析尺度和事件视界相当的黑洞影像。
翻译:“每日一天文图”成大物理分站

Simulation: Two Black Holes Merge
Simulation Credit: Simulating eXtreme Spacetimes Project

Explanation: Sit back and watch two black holes merge. Inspired by the first direct detection of gravitational waves in 2015, this simulation video plays in slow motion but would take about one third of a second if run in real time. Set on a cosmic stage the black holes are posed in front of stars, gas, and dust. Their extreme gravity lenses the light from behind them into Einstein rings as they spiral closer and finally merge into one. The otherwise invisible gravitational waves generated as the massive objects rapidly coalesce cause the visible image to ripple and slosh both inside and outside the Einstein rings even after the black holes have merged. Dubbed GW150914, the gravitational waves detected by LIGO are consistent with the merger of 36 and 31 solar mass black holes at a distance of 1.3 billion light-years. The final, single black hole has 63 times the mass of the Sun, with the remaining 3 solar masses converted into energy in gravitational waves. Since then the LIGO and VIRGO gravitational wave observatories have reported several more detections of merging massive systems, while last week the Event Horizon Telescope reported the first horizon-scale image of a black hole.
Astronomy Picture of the Day 04/14/2019