本帖最后由 gohomeman1 于 2010-1-12 11:23 编辑
本文是我早期发的帖子,今天重新编辑了全文。
http://hubblesite.org/newscenter/archive/releases/2009/10/
March 3, 2009 06:00 AM (EST)
News Release Number: STScI-2009-10
太空望远镜科研所2009年第10#新闻公报,美国东部时间2009.03.03 06:00公布。
Trio of Galaxies Mix It Up
三个星系间的激战
March 3, 2009: This NASA Hubble Space Telescope image shows three galaxies playing a game of gravitational tug-of-war that may result in the eventual demise of one of them.
2009.3.3:NASA的哈勃太空望远镜图像显示,三个星系正在进行引力拔河,最终结果是其中的一个将被消灭。
Located about 100 million light-years away in the constellation Piscis Austrinus (the Southern Fish), the galaxy interaction may ultimately lead to the three reforming into two larger star cities.
这三个星系位于南鱼座,离我们约1亿光年,引力相互作用最终可能导致三者合并为两个大星系。
The three galaxies—NGC 7173 (middle left), NGC 7174 (middle right),and NGC 7176 (lower right)—are part of Hickson Compact Group 90, named after astronomer Paul Hickson, who first cataloged these small clusters of galaxies in the 1980s. NGC 7173 and NGC 7176 appear to be smooth,normal elliptical galaxies without much gas and dust.
位于左方的NGC 7173、位于右边的NGC 7174和位于右下的NGC7176都是希克森致密星系团90#成员。这些小型致密星系团由保尔.希克森于20世纪80年代首次命名、编录。NGC 7173、7176貌似光滑的椭圆星系,没有多少尘埃、气体。
In stark contrast, NGC 7174 is a mangled spiral galaxy that appearsas though it is being ripped apart by its close neighbors. The galaxies are experiencing a strong gravitational interaction, and as a result, a significant number of stars have been ripped away from their home galaxies. These stars are now spread out, forming a tenuous luminous component in the galaxy group.
相比之下,NGC 7174是个变形的涡旋星系,被其邻居撕裂。它正在经历强大的引力潮汐作用,有相当数量的恒星从宿主星系中被剥离,它们现在延伸为一条光亮、纤薄的潮汐尾。
Ultimately, astronomers believe that NGC 7174 will be shredded and only the two "normal" elliptical galaxies (NGC 7173 and NGC 7176) will remain.
天文学家相信,NGC 7174将被扯碎,最终只剩下2个“正常”的椭圆星系——NGC 7173、7176。
Hubble imaged these galaxies with the Advanced Camera for Surveys in May 2006.
本图像由哈勃的高级巡天相机(ACS)摄于2006.5。
For additional information, contact:
更多信息,请联系:
Colleen Sharkey
Hubble/ESA, Garching, Germany
德国加兴市,欧洲空间局哈勃项目部
011-49-89-3200-6306
011-49-015115373591 (cell)
csharkey@eso.org
Ray Villard
雷.维拉德
Space Telescope Science Institute, Baltimore, Md.
马里兰州巴尔的摩市,太空望远镜科研所
410-338-4514
villard@stsci.edu
Object Names: Hickson Compact Group 90, HCG 90
对象名称:希克森致密星系团90#,HCG 90
Image Type: Astronomical
图像类型:天体
Credit: NASA, ESA, and R. Sharples (University of Durham)
版权:美国宇航局(NASA),欧洲空间局(ESA);(英国)杜汉姆大学 R.Sharples |
评分
-
查看全部评分
|