GRB 221009 a
(原标题: GRB 221009A)
2022-10-15
浏览次数: 25
伽马射线暴GRB 221009A可能标志着一个新黑洞的诞生，这个黑洞形成于很久以前遥远宇宙中一颗坍缩恒星的核心。这张利用费米伽玛射线太空望远镜数据制作的gif动画展示了这次极其强大的爆炸。费米以伽马射线能量捕获数据，探测到超过1亿电子伏特的光子。相比之下，可见光光子的能量约为2电子伏特。从我们银河系平面发出的稳定的高能伽玛射线沿对角线穿过左侧20度宽的框架，而GRB 221009A的瞬态伽玛射线闪光出现在中心，然后消失。迄今为止探测到的最亮的伽马射线暴之一GRB 221009A距离伽马射线暴也很近，但距离仍有大约20亿光年。上周日，也就是10月9日，在近地轨道上，费米的大面积望远镜记录下了GRB 221009A的高能辐射横扫地球的10多个小时。
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Gamma-ray burst GRB 221009A likely signals the birth of a new black hole, formed at the core of a collapsing star long ago in the distant universe. The extremely powerful blast is depicted in this animated gif constructed using data from the Fermi Gamma Ray Space Telescope. Fermi captured the data at gamma-ray energies, detecting photons with over 100 million electron volts. In comparison visible light photons have energies of about 2 electron volts. A steady, high energy gamma-ray glow from the plane of our Milky Way galaxy runs diagonally through the 20 degree wide frame at the left, while the transient gamma-ray flash from GRB 221009A appears at center and then fades. One of the brightest gamma-ray bursts ever detected GRB 221009A is also close as far as gamma-ray bursts go, but still lies about 2 billion light-years away. In low Earth orbit Fermi’s Large Area Telescope recorded gamma-ray photons from the burst for more than 10 hours as high-energy radiation from GRB 221009A swept over planet Earth last Sunday, October 9.