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NASA天文学家首次捕捉到恒星变黑洞瞬间画面
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Topic: NASA天文学家首次捕捉到恒星变黑洞瞬间画面 (Read 90 times)
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NASA天文学家首次捕捉到恒星变黑洞瞬间画面
May 29, 2017, 04:43:55 PM
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天文学家已经观测到了一个大质量、垂死的恒星很可能已经变成为一个黑洞。科学家们利用了大型双筒望远镜(LBT)、NASA的哈勃望远镜和斯皮策空间望远镜的联合力量来寻找这个消失恒星的遗迹,结果发现它已经完全消失在天文学家的视线之外了。它悄无声息的就消失了,并没有产生爆炸。
这颗恒星的质量是我们太阳质量的25倍,本来应该产生一个非常明亮的超新星爆发。然而,它没有爆发,却只安静地留下了一个黑洞。
俄亥俄州立大学天文学教授克里斯托弗o柯夏内克(Christopher Kochanek)说,像这个位于临近星系中的“失败的大质量恒星”就可能解释为什么我们很少看到来自于最重恒星的超新星爆发现象。柯夏内克教授也是俄亥俄州观测宇宙学界的知名学者。
现在看来,多达30%的类似这样的恒星或许会安静地坍缩成黑洞,无需超新星爆发。
柯夏内克解释说:“通常的观点是,一颗恒星只能在超新星爆发之后形成一个黑洞。那么现在看来,如果一颗恒星不能产生超新星,但还是能够产生一个黑洞,这将有助于解释为什么我们没有看到最重恒星所形成的超新星。”
他所领导的一个天文学家团队,在皇家天文学会月刊(MNRAS)上发表了最新的研究结果。
在他们一直监测的星系当中有一个星系是NGC6946,这是一个距离我们2200万光年的旋涡星系,俗称为“烟花之星”,因为超新星经常发生在那里。实际上,在2017年5月14日发现的超新星SN 2017eaw现在就大约处在其亮度的最大值。而另外一个特别的发现是一颗被命名为N6946-BH1的恒星,从2009年开始,它就开始微弱地变亮了一点。但是等到2015年的时候,它似乎已经消失不存在了。
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Re: NASA天文学家首次捕捉到恒星变黑洞瞬间画面
May 29, 2017, 04:44:24 PM
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不得了,大发现
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