Astronomy Picture of the Day——黑洞周围的旋涡状吸积盘

Animation: Spiral Disk around a Black Hole 
Illustrated Animation Credit: ESA, NASA, Hubble, M. Kornmesser

Explanation: What would it look like to orbit a black hole? Many black holes are surrounded by swirling pools of gas known as accretion disks. These disks can be extremely hot, and much of the orbiting gas will eventually fall through the black hole's event horizon -- where it will never been seen again. The featured animation is an artist's rendering of the curious disk spiraling around the supermassive black hole at the center of spiral galaxy NGC 3147. Gas at the inner edge of this disk is so close to the black hole that it moves unusually fast -- at 10 percent of the speed of light. Gas this fast shows relativistic beaming, making the side of the disk heading toward us appear significantly brighter than the side moving away. The animation is based on images of NGC 3147 made recently with the Hubble Space Telescope.

黑洞周围的旋涡状吸积盘

环绕黑洞运行看起来会是什么样的景象？很多黑洞都被名为吸积盘的旋涡状气团所围绕着。这些吸积盘都十分炽热，大部分环绕黑洞的气体最终都会落入黑洞的事件视界，之后便再也看不到了。这幅精彩的动画是一位艺术家渲染的作品，它呈现了环绕旋涡星系NGC 3147中心特大质量黑洞的奇特吸积盘。吸积盘内缘的气体距离黑洞如此之近，以至于它的速度可达光速的10%。这种速度的气体展现了相对论性辐射，使得吸积盘朝向我们的一侧看起来比远离我们一侧要明亮很多。这段动画是根据哈勃太空望远镜最近拍摄的NGC 3147影像制作而成的。

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