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银河系现超大黑洞 科学家惊:它根本不应该存在 – 多伦多新闻网

银河系现超大黑洞 科学家惊:它根本不应该存在

“自然”(Nature)期刊今天刊登的研究显示,天文学家在银河系发现一个超级巨大的黑洞,大到挑战现有的恆星演化模型。

这个黑洞名为LB-1,距地球约1万5000光年,质量比太阳大70倍。

银河系约有一亿个黑洞,但LB-1的大小足足比科学家认为可能存在的黑洞还大上一倍。

领导研究的中国科学院国家天文台教授刘继峰说:”根据大部分现有的恆星演化模型,这种质量的黑洞,甚至连存在都不该存在我们的银河系中。”

科学家一般认为黑洞有两种,一种是比较常见的恆星黑洞(Stellar black hole),是大质量恆星重力坍塌后形成,质量最大可达太阳的20倍;二是超大质量黑洞(Supermassive black holes),至少比太阳大100万倍,形成原因不明。

但研究人员认为,由于银河系中典型恆星的气体,大部分都透过恆星风喷发了,LB-1这种大小的黑洞根本连形成都不可能形成。

LB-1是由科学家组成的国际团队用中国的”郭守敬望远镜”(大天区面积多目标光纤光谱天文望远镜,LAMOST)观测到的,西班牙加那利大型望远镜( Gran Telescopio Canarias)与美国夏威夷凯克(Keck I)这两座世界最大的光学望远镜的影像证实了LB-1的大小,套句中国科学院国家天文台的话说,LB-1的大小,”真是太神奇啦”。

文章来源: 中央社 于


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