A galactic chimney in the Perseus arm of the Milky Way

Article Abstract:

A high-resolution map of atomic hydrogen in the Perseus arm of the Milky Way indicates the presence of a galactic chimney. The chimney is a cavity in the interstellar medium formed by energetic winds from a cluster of young, larger stars. The chimney acts as an efficient means of hot gas transport from the galaxy's disk to its halo. The cavity in the atomic gas associated with the chimney exhibits a velocity interval of 14.8 km per second. The hydrogen density at the latitude of the star cluster is 5 atoms per cubic cm.

Interstellar molecules, Perseus (Constellation)

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A confirmed location in the Galactic halo for the high-velocity cloud 'chain A.'

Article Abstract:

It has been possible to identify a firm distance bracket for a large high-velocity cloud, chain A. This distance bracket places chain A in the Galactic halo, rather than in intergalactic space. The location of chain A in the Galactic halo still permits a number of models for its origin. It is possible that chain A may represent gas captured from intergalactic space. An indication of the origin of chain A may be given by its metallicity.

Cloud physics

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