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Diffuse Interstellar Clouds

Published online by Cambridge University Press:  30 March 2016

David L. Lambert
Affiliation:
Department of Astronomy The University of Texas Austin, TX 78712, USA
S. R. Federman
Affiliation:
Department of Physics and Astronomy University of Toledo Toledo, OH 43606, USA

Abstract

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Diffuse clouds are interstellar objects through which starlight is not greatly extinguished. As a result, many studies rely on ultraviolet and visible measurements. The focus of this review is on spectroscopic work involving atomic and molecular lines. From these measurements, the physical and chemical makeup of the clouds is derived. Here we stress that technological advances have influenced our perception of diffuse clouds.