本帖最后由 水星人 于 2009-3-15 07:39 编辑
Credit: NASA,ESA,Hubble Heritage(STScI/AURA);
A. Fabian (IoA, Cambridge U.),L. Frattare (STScI),CXC,G. Taylor, NRAO,VLA Explanation: Active galaxy NGC 1275is the central, dominant member of the large andrelatively nearbyPerseus Cluster of Galaxies.A prodigious source ofx-raysandradioemission, NGC 1275 accretesmatter as entire galaxies fall into it, ultimatelyfeeding a supermassive black hole at the galaxy's core.This stunningvisiblelight image from the Hubble Space Telescopeshows galactic debrisand filaments of glowing gas,some up to 20,000 light-years long.The filaments persist in NGC 1275, even thoughthe turmoil of galactic collisions should destroy them. What keeps the filaments together?Recent workindicates that the structures, pushed outfrom the galaxy's center by the black hole's activity, areheld together by magnetic fields.Toadd x-ray datafrom the Chandra Observatory and radio data fromthe Very Large Arrayto the Hubble image, just slideyour cursor over the picture.In the resulting composite, x-rays highlight theshells of hot gassurrounding the center of the galaxy, with radio emission fillinggiant bubble-shaped cavities.Also known as Perseus A,NGC 1275spans over 100,000 light years andlies about 230 million light years away.
感谢江涛翻译：
说明：活动星系NGC1275是相对临近而又巨大的英仙座星系团内占据主要地位的中心成员。作为一个巨大的X射线和射电源，当整个星系都进入星系中央的超级黑洞时，NGC1275内就会生成物质，。这张绚丽的可见光影像来自哈勃太空望远镜，显示了星系的碎片和炽热气体形成的灯丝状物质，有些长度达到了2万光年。这些灯丝状物质一直位于NGC1275内，尽管星系碰撞可能会摧毁它们。是什么让这些灯丝状物质聚集在一起呢？最近的研究表明中央黑洞的活动使得从星系中央推出的结构被磁场结合在一起。只要将鼠标放在上面的影像上就能看到在哈勃影像上叠加了由钱德拉天文台拍摄到的X射线数据和极大阵拍摄到的无线射电数据的合成影像。在合成的影像中，Ｘ射线突出了星系中央周围炽热的气体罩，以及无线射电形成的巨大泡状空穴。NGC1275也被称为英仙座A，大小覆盖超过了10万光年，距离我们大约2.3亿光年远。
本文摘自成大物理分站
PS：有哪位朋友能帮忙翻译下，谢谢！
[ 本帖最后由 水星人 于 2008-8-22 21:07 编辑 ] |
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