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超大质量黑洞“撕裂” 恒星首次被观测到

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小编摘要:距地球39亿光年的超大质量黑洞,将靠近其的一颗恒星撕裂并吞噬,吞噬后由黑洞甩出的巨大喷流被天文学家观测到。据悉黑洞每隔一亿年才会吞噬一颗恒星,观测到这一极其罕见天文现象,在天文史上是首次。

导读:今年三月,科学家通过美国宇航局雨燕卫星探测到的X射线量,觉察到有黑洞吞噬现象的存在。由美国宾州州立大学和哈佛-史密松森天体物理中心组成的天文团队称,这一超大质量黑洞距地球39亿光年远,恒星接近它后被瞬间撕裂后吞噬,然后甩出巨大喷流。此次发现的超大质量黑洞质量约有百万个大阳(最大可达数以十亿计个太阳质量),吞噬恒星后,黑洞质量再次增加。据悉黑洞每隔一亿年才会吞噬一颗恒星,观测到这一极其罕见天文现象,在天文史上是首次。

Stunning: Plasma shoots out of the black hole after it devoured a star. The event took place four billion light years from Earth

Stunning: This illustration shows plasma shooting out of the black hole after it devours a star. Such an event took place four billion light years from Earth

A stunning cosmic jet from a super-massive black hole which shredded then swallowed a star has been observed by astronomers for the first time.

The extremely rare phenomenon caused by stellar debris being consumed by the hole has never been observed before.

Known as 'relativistic jets', they can reach hundreds of thousands of light years in length.

Most galaxies have super-massive black holes - regions of space that suck in everything nearby with their strong gravitation pull - at their core, with masses of millions or even billions of suns.

Scientists were first alerted to the phenomenon in March after Nasa's Swift telescope detected several bursts of X-rays from a quiet patch of sky.

Teams from both Pennsylvania State University and the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, said the bursts could be the remnants of a star pulled apart when it came too close to a black hole located 3.9billion light years away.

Dr David Burrows, from Pennsylvania State University which controls Swift, said chemical analysis of the bright flash's ultraviolet light show it comes from material being sucked into a black hole the size of a million suns.

Writing in Nature, they concluded that the Swift satellite just happened to be in the path of the jet of star remains that were shot out at 99.5 per cent the speed of light.

Dr Burrows said: 'Incredibly, this source is still producing X-rays and may remain bright enough for the Swift satellite to observe into next year. It behaves unlike anything we've seen before.'

The swallowing of a star by a black hole only happens once every one hundred million years in a galaxy. The black hole is now believed to be even more powerful because of the additional mass from the swallowed star.

The absorption of large mass such as stars or even other black holes is what gives black holes growth and spawn the existence of super-massive black holes.Super-massive black holes could contain up to billions of solar masses. By comparison, the sun is just one solar mass and the Earth is 1/332,950th of a solar mass.

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2011-08-26 13:36 编辑:jeannn
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  • gyd.miu 说:

    真害怕有一天地球周围出现黑洞。。

    2011-08-27 22:34 回复 支持(0) 反对(0) 沙发
  • 黑洞的里面是可以通向另一个世界吗;是地狱还是天堂

    2011-08-28 08:12 回复 支持(0) 反对(0) 板凳
    • you are so cute~黑洞吞噬星球,可能把星球运到另一个空间亦可能是另一个宇宙或系(像银河系,太阳系)还有就是单纯把星球毁灭了...根本不存在地狱天堂之说...不论是那种情况发生,星球上的生物都会灭绝消失...

      2011-08-28 17:51 回复 支持(1) 反对(0)
    • 当然保持童心还是好的...

      2011-08-28 17:51 回复 支持(1) 反对(0)
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