Infrared Dark Clouds: precursors to star clusters

Details Infrared Dark Clouds: precursors to star clusters Infrared Dark Clouds: precursors to star clusters

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..322..273r&link_type=abstract

The Formation and Evolution of Massive Young Star Clusters, ASP Conference Series, Vol. 322. Edited by H.J.G.L.M. Lamers, L.J.

Astronomy and Astrophysics

Astronomy

Scientific paper

Infrared Dark Clouds (IRDCs) are a new class of object recently identified, as extinction features, in mid--infrared images. We have identified ˜12,000 IRDCs in the Galaxy, and using 13CO molecular line emission maps, have obtained reliable distances to ˜300 of them. Our molecular line and preliminary millimeter continuum data suggest that IRDCs are the cold molecular precursors to star clusters. They contain dense, cold cores with characteristic masses ˜10--100 M&sun;. Thus, IRDCs have begun to fragment into pre-stellar cores, and may eventually form bound star clusters.

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