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Initial conditions for massive star birth–Infrared dark clouds

Published online by Cambridge University Press:  08 November 2005

K. M. Menten ,
T. Pillai  and
F. Wyrowski
K. M. Menten
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
T. Pillai
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
F. Wyrowski
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
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Abstract

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We summarize the properties of Infrared Dark Clouds, massive, dense, and cool aggregations of interstellar gas and dust that are found throughout the Galaxy in projection against the strong mid-infrared background. We describe their distribution and give an overview of their physical properties and chemistry. These objects appear to be the progenitors of high-mass stars and star clusters, but seem to be largely devoid of star formation, which however is taking place in localized spots.

Keywords

stars: formationISM: cloudsISM: moleculesinfrared: generalradio lines: ISMmasers