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Rare cosmic neutrino traced to star-shredding black hole
Science ( IF 56.9 ) Pub Date : 2021-02-26 , DOI: 10.1126/science.371.6532.872
Daniel Clery

Neutrinos are everywhere, streaming through your body by the trillions every second. But the chargeless, nearly massless particles are notoriously hard to pin down, especially the rare high-energy ones from deep space. Only about a dozen cosmic neutrinos are detected annually, and only one had been linked to a source in the sky. Now, IceCube, a kilometer-wide neutrino detector nestled deep beneath the South Pole, has traced another one to its birthplace: a supermassive black hole tearing a star to pieces in a galaxy 750 million light-years away. The discovery suggests these rare tidal disruption events could be a major source of high-energy neutrinos and cosmic rays—other deep-space visitors whose origins have also been a mystery.



中文翻译:

稀有的宇宙中微子可追溯到星状破碎的黑洞

中微子无处不在,每秒流过您体内的万亿兆。但是众所周知,无电荷,几乎无质量的粒子很难固定下来,尤其是来自深空的稀有高能粒子。每年仅检测到大约十二个宇宙中微子,并且只有一个与中空源有关。现在,位于南极深处的一公里宽的中微子探测器IceCube再次找到了它的发源地:一个超大质量的黑洞,在7.5亿光年远的星系中将一颗恒星撕成碎片。该发现表明,这些罕见的潮汐破坏事件可能是高能中微子和宇宙射线的主要来源-其他深空游客的起源也一直是个谜。

更新日期:2021-02-26
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