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词汇 Blue Compact Galaxy
分类 英语词汇 英语翻译词典
释义

Blue Compact Galaxy

中文百科

星暴星系 Starburst galaxy

(重定向自Blue Compact Galaxy)
由NGC 4038/NGC 4039互撞形成的触须星系是星暴星系的例子。图片来源:NASA/ESA。
哈伯太空望远镜拍摄到在邻近的NGC 1569(阿普 210)核心区域的星爆活动。

星暴星系是在比较星系的恒星形成速率时,其形成速率比大多数的星系都要高出许多的一种星系。通常在两个星系过度靠近或发生碰撞之际,会有爆发性的恒星形成。在这种星系中,恒星形成的速率是很惊人的,如果要持续这种速率,要供应恒星形成所保存的气体,在远短于星系的动力生命期内就会耗尽。基于这个原因,星爆过程被假设为短暂时期的现象,最出名的星暴星系是M82、NGC 4038/NGC 4039和IC 10。

英语百科

Starburst galaxy 星暴星系

(重定向自Blue Compact Galaxy)
The Antennae Galaxies are an example of a starburst galaxy occurring from the collision of NGC 4038/NGC 4039. Credit: NASA/ESA.
Light and dust in a nearby starburst galaxy[1]
Artist's impression of a galaxy undergoing a starburst.[2]
Messier 82 is the prototype nearby starburst galaxy about 12 million light-years away in the constellation Ursa Major.

A starburst galaxy is a galaxy undergoing an exceptionally high rate of star formation, as compared to the long-term average rate of star formation in the galaxy or the star formation rate observed in most other galaxies. In a starburst galaxy, the rate of star formation is so large that the galaxy will consume all of its gas reservoir, from which the stars are forming, on a timescale much shorter than the age of the galaxy. As such, the starburst nature of a galaxy is a phase, and one that typically occupies a brief period of a galaxy's evolution. The majority of starburst galaxies are in the midst of a merger or close encounter with another galaxy. Well-known starburst galaxies include M82, NGC 4038/NGC 4039 (the Antennae Galaxies), and IC 10.

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