Concept information
Preferred term
Infrared dark clouds
Definition
- A dark cloud characterized by a visual extinction A_v ≥ 10^2 mag. Infrared dark clouds are opaque even at 8 μm, and can be seen in silhouette against the bright diffuse mid-infrared emission in the interstellar medium. (en)
Broader concept
- Dark interstellar clouds (en)
- Molecular clouds (en)
Entry terms
- IRDC (en)
Editorial note
URI
http://astrothesaurus.org/uat/787
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