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Interstellar Dust and Related Topics
We propose that many of the denser dust clouds represent transient stages between the initiation of gravitational collapse of ordinary interstellar clouds by passage through a spiral galactic shock and the appearance of a stellar association. The interstellar gas is not processed at too rapid a rate (1) because the time spent between galactic shocks is appreciably longer than the free-fall collapse time of a typical dust cloud, and (2) because only a small fraction of the total mass of gas of adoi:10.1007/978-94-010-2661-1_39 fatcat:nhrijffaxjc6dasrsteyvk76v4