本地宇宙中的恒星流
(原标题: Stellar Streams in the Local Universe)
2024-09-27
浏览次数: 13
在这些面板上排列的20个星系是对潮汐恒星流的雄心勃勃的天文调查的一部分。每个面板呈现一个复合视图；这是一张深度倒置的照片，拍摄于一个围绕着附近大质量星系的区域的公开成像调查中。倒映的图像显示了微弱的宇宙结构，恒星流横跨数十万光年，这是由引力破坏和本地宇宙中卫星星系最终合并造成的。这种对大质量星系及其矮卫星之间的合并和引力潮汐相互作用的调查是当前星系形成和宇宙学模型的重要指南。当然，在邻近的仙女座星系和我们自己的银河系中探测到的恒星流也为我们更本地的星系群中正在发生的卫星星系破坏提供了壮观的证据。
查看原文解释
The twenty galaxies arrayed in these panels are part of an ambitious astronomical survey of tidal stellar streams. Each panel presents a composite view; a deep, inverted image taken from publicly available imaging surveys of a field that surrounds a nearby massive galaxy image. The inverted images reveal faint cosmic structures, star streams hundreds of thousands of light-years across, that result from the gravitational disruption and eventual merger of satellite galaxies in the local universe. Such surveys of mergers and gravitational tidal interactions between massive galaxies and their dwarf satellites are crucial guides for current models of galaxy formation and cosmology. Of course, the detection of stellar streams in the neighboring Andromeda Galaxy and our own Milky Way also offers spectacular evidence for ongoing satellite galaxy disruption within our more local galaxy group.