A galactic chimney in the Perseus arm of the Milky Way

Nature
M NormandeauP E Dewdney

Abstract

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.

Citations

Mar 23, 2000·The Astrophysical Journal·J EnglishD Johnstone
Jul 19, 2001·Nature·J M Dickey
Apr 25, 1996·Nature·J M Shull

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