1975•The Astrophysical JournalRequires access

A Molecular Cloud in IC 1396

R. B. Loren, W. L. Peters, Paul A. Vanden Bout

Abstract

Observations of the large cometary nebula in IC 1396 show it to be a strong source of molecular line emission. The "C'6O and `8C'6O (J = 1-0) line intensities have been mapped and are well correlated with the optical appearance of the cloud. Emission from SO, HCN, and CS has been detected at the position of peak CO line intensity. Analysis of the CO line intensity maps reveals differing distributions of CO excitation temperature and column density. A heating source is required for the cloud, and a search for an infrared source is suggested. Subject headings: interstellar matter - molecules, interstellar - nebulae

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Key concepts: Physics, Molecular cloud, Astrophysics, Line (geometry), Interstellar cloud, Nebula, Interstellar medium, Emission spectrum