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Published August 1, 1974 | Published
Journal Article Open

A New Infrared Complex and Molecular Cloud in Orion


A new complex of infrared sources ~1' across has been discovered in Orion. Associated with this cluster is an extended ~6' molecular cloud producing intense CO emission. Its measured infrared luminosity is less than ~500 L_☉. The complex is hypothesized to be composed of pre-main-sequence sources. Several arguments suggest that these stars heat dust in the larger molecular cloud and thus cause the strong CO emission. The complex is not associated with a known visible or radio continuum feature, and searches over a 0.º7 X 0.º7 field show no other comparable unknown 2.2-μ sources.

Additional Information

© 1974 American Astronomical Society. Received 1974 April 30. We thank S. Beckwith, J. Carrasco, G. Hancock, K. Jefferts, and P. Solomon for their assistance with the observations and J. Frogel, M. Werner, and B. Zuckerman for discussions. This work was supported by National Aeronautics and Space Administration grant NGL 05-002-207 and National Science Foundation grant GP 35545X.

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Published - 1974ApJ___191L_121G.pdf


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