模拟：一个圆盘星系的形成
(原标题: Simulation: A Disk Galaxy Forms)
2023-05-31
浏览次数: 14
我们是怎么走到这一步的？我们知道我们生活在一颗行星上，绕着一颗恒星绕着一个星系运行，但这一切是如何形成的呢？由于我们的宇宙运动太慢而无法观测，因此创建了更快的计算机模拟来帮助找到答案。具体来说，这段来自IllustrisTNG合作的特色视频跟踪了从早期宇宙（红移12）到今天（红移0）的气体。随着模拟的开始，环境气体落入并积聚在一个相对高重力的区域。几十亿年后，一个定义明确的中心从一个奇怪而迷人的宇宙之舞中显现出来。随着当前时代的到来和视频的结束，气体团——一些代表小卫星星系——继续落入并被旋转的星系吸收。然而，对于银河系来说，大型合并可能还没有结束——最近的证据表明，我们的大型螺旋盘星系将在未来几十亿年内与稍大的仙女座螺旋盘星系碰撞并合并。开放科学：浏览天体物理学源代码库中的3000多个代码
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How did we get here? We know that we live on a planet orbiting a star orbiting a galaxy, but how did all of this form? Since our universe moves too slowly to watch, faster-moving computer simulations are created to help find out. Specifically, this featured video from the IllustrisTNG collaboration tracks gas from the early universe (redshift 12) until today (redshift 0). As the simulation begins, ambient gas falls into and accumulates in a region of relatively high gravity. After a few billion years, a well-defined center materializes from a strange and fascinating cosmic dance. Gas blobs -- some representing small satellite galaxies -- continue to fall into and become absorbed by the rotating galaxy as the present epoch is reached and the video ends. For the Milky Way Galaxy, however, big mergers may not be over -- recent evidence indicates that our large spiral disk Galaxy will collide and coalesce with the slightly larger Andromeda spiral disk galaxy in the next few billion years. Open Science: Browse 3,000+ codes in the Astrophysics Source Code Library