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Published June 1, 1977 | Published
Journal Article Open

Infrared studies of H II regions and dust clouds near K3 - 50


New ground-based infrared observations of the K3–50 region are reported at wavelengths between 2 and 34 μm, and at 1 mm. The main results are (a) that the visible nebula K3–50 is displaced from its infrared and radio counterparts, (b) that component C1 (the OH source ON-3) appears very faint at λ ⩽ 20μm⁠, and is therefore probably obscured by several hundred magnitudes of visual extinction, (c) that both K3–50 and component Care associated with separate condensations of molecular hydrogen, each of about 3000 M⊙, and (d) there are no strong sources in this region at 20 μm other than those associated with H II condensations.

Additional Information

© 1977 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Received 1976 November 11; in original form 1976 October 19; Published: 01 June 1977. We thank the University of Hawaii for observing time on their 2.2-m telescope. We are indebted to our night assistants Frank Cheigh and Peter Hendricks at Mauna Kea, and Gary Tuton at Palomar for help with the observations, to François Schweitzer and John Huchra for taking plates of the region for us, and to Harley Thronson, Al Harper, David Colley and Paul Scott for communicating and allowing us to quote their results prior to publication. This work was performed under NASA grant NGL05-02-207 and NSF grant MPS74-18555A01.

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