NGC 7714：星系碰撞后的星爆
(原标题: NGC 7714: Starburst after Galaxy Collision)
2024-03-17
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这个星系是在一个巨大的恒星环中跳跃吗？可能不会。尽管这张特色图像背后的精确动力学尚不清楚，但可以确定的是，照片中的星系NGC 7714在最近与邻近星系的碰撞中被拉伸和扭曲了。这个较小的邻居，NGC 7715，位于画面的左侧，被认为正好穿过NGC 7714。观测表明，照片中的金环是由数百万颗更古老的类太阳恒星组成的，这些恒星很可能与内部更蓝的恒星一起运动。相比之下，NGC 7714明亮的中心似乎正在经历新恒星形成的爆发。这张特色图片是由哈勃太空望远镜拍摄的。NGC 7714距离双鱼座约1.3亿光年。这些星系之间的相互作用可能始于大约1.5亿年前，并将持续数亿年，之后可能会形成一个单一的中央星系。
查看原文解释
Is this galaxy jumping through a giant ring of stars? Probably not. Although the precise dynamics behind the featured image is yet unclear, what is clear is that the pictured galaxy, NGC 7714, has been stretched and distorted by a recent collision with a neighboring galaxy. This smaller neighbor, NGC 7715, situated off to the left of the frame, is thought to have charged right through NGC 7714. Observations indicate that the golden ring pictured is composed of millions of older Sun-like stars that are likely co-moving with the interior bluer stars. In contrast, the bright center of NGC 7714 appears to be undergoing a burst of new star formation. The featured image was captured by the Hubble Space Telescope. NGC 7714 is located about 130 million light years away toward the constellation of the Two Fish (Pisces). The interactions between these galaxies likely started about 150 million years ago and should continue for several hundred million years more, after which a single central galaxy may result.