Normandeau M, Taylor A R, Dewdney P E
Department of Physics and Astronomy, University of Calgary, Alberta, Canada.
Nature. 1996 Apr 25;380(6576):687-8. doi: 10.1038/380687a0.
Galaxies are surrounded by large haloes of hot gas which must be replenished as the gas cools. This has led to the concept of galactic 'chimneys'--cavities in the interstellar medium, created by multiple supernova explosions, that can act as conduits for the efficient transport of hot gas from a galaxy's disk to its halo. Here we present a high-resolution map of atomic hydrogen in the Perseus arm of our galaxy, which shows clear evidence for the existence of such a chimney. This chimney appears to have been formed by the energetic winds from a cluster of young massive stars, and may currently have reached the stage of bowing out into the halo.
星系被大量的热气体晕所包围，随着气体冷却，这些热气体必须得到补充。这就引出了星系“烟囱”的概念——星际介质中的空洞，由多次超新星爆炸形成，可作为将热气体从星系盘高效输送到其晕的管道。在此，我们展示了银河系英仙座悬臂中氢原子的高分辨率地图，该地图清楚地证明了这种烟囱的存在。这个烟囱似乎是由一群年轻大质量恒星产生的高能风形成的，目前可能已进入向晕中弯曲延伸的阶段。
