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789
银河系中发现有个质量比太阳大70倍的“超巨大黑洞”。
日前天文学家在银河系中发现,有个距离地球约1万5000光年的超巨大黑洞,并将它命名为“LB-1”。其大小比天文学家认为银河中可能存在的黑洞,整整大了一倍。
从现有的恒星演化模型来看,这种质量的黑洞应该不太可能存在于银河系当中。
根据《Nature》期刊最新刊登的研究指出,由中国科学院国家天文台教授刘继峰带领的研究团队,透过“郭守敬望远镜”观测到这个黑洞,其质量比太阳大70倍,且经西班牙加那利大型望远镜(Gran Telescopio Canarias)与美国夏威夷凯克(Keck I),这2座世界最大的光学望远镜影像证实。
观测到此一现象让科学家都深感惊叹,目前较常见的恒星黑洞(Stellar black hole),是大质量恒星重力坍塌后形成,质量最大可达太阳的20倍。
刘继峰指出,“根据现有的恒星演化模型,像LB-1这种大小的黑洞,甚至根本不该存在于我们的银河系中”。
“LB-1”的出现不只是一项纪录,还是一道难题,因为它的质量约是太阳的70倍,不属于目前研究中的任何一种黑洞。
天体物理学家泽文(Michael Zevin)表示,“从没有想过银河系可以出现这么大的黑洞,如果观察结果正确无误,那是一个非常让人头痛的问题。”
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