NASA 每日搬运 D41
（如果黑洞把我们侵蚀了 我还是感谢能拥有过年陪在身边的家人～）
Supermassive black holes are outgrowing their galaxies!
超大质量的黑洞超出了他们的星系！
Over many years, astronomers have gathered data on the formation of stars in galaxies and the growth of supermassive black holes (that is, those with millions or billions the mass of the Sun) in their centers. These data suggested that the black holes and the stars in their host galaxies grow in tandem with each other. Now, findings from two independent groups of researchers indicate that the black holes in massive galaxies have grown much faster than in the less massive ones.
多年来，天文学家收集了关于星系中恒星形成和在其中心超大质量黑洞（即那些拥有数百万或数十亿太阳质量的太阳）的数据。这些数据表明黑洞和宿主星系中的恒星相互串联生长。现在，来自两个独立研究小组的研究结果表明，大质量星系中的黑洞比大质量星系中的黑洞增长得快得多。
Using large amounts of data from our Chandra X-ray Observatory (@nasachandraxray), the Hubble Space Telescope (@NASAHubble) and other observatories, scientists studied the growth rate of black holes in galaxies at distances of 4.3 to 12.2 billion light years from Earth. They calculated the ratio between a supermassive black hole's growth rate and the growth rate of stars in its host galaxy.
A common idea is that this ratio is approximately constant for all galaxies. Instead, the researchers found that this ratio is much higher for more massive galaxies. For galaxies containing about 100 billion solar masses worth of stars, the ratio is about ten times higher than it is for galaxies containing about 10 billion solar masses worth of stars.
利用我们钱德拉X射线天文台（@nasachandraxray）、哈勃太空望远镜（@NASAHubble）和其他天文台的大量数据，科学家们研究了距离地球4.3-122亿光年的星系中黑洞的增长率。他们计算了超大质量黑洞的增长率与其宿主星系中恒星的增长率之间的比率。
一个普遍的想法是，这个比例对于所有星系来说大致是恒定的。事实相反，研究人员发现，这个比例对于更多的大质量星系来说要高得多。对于包含价值约1000亿太阳质量恒星的星系而言，这个比率比拥有约100亿太阳质量恒星的星系约高10倍。
This image shows data from the Chandra Deep Field-South in optical and infrared light from the Hubble, and X-ray light from Chandra.
该图像显示来自哈勃望远镜的Chandra Deep Field-South光学和红外光以及来自Chandra的X射线光的数据。
Credit: NASA/CXC/Penn. State/G. Yang et al & NASA/CXC/ICE/M. Mezcua et al.; Optical: NASA/STScI
#nasa #chandra #blackhole #science #astronomy #hubble#optical #infrared #xray #light #galaxies #galaxy#picoftheday #imageoftheday #space
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