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Results of HC3N observations of 15 dense molecular cloud cores, associated with bright IRAS sources in the outer Galaxy, are reported. HC3N column densities and emission region sizes have been calculated. The J=10-9 line analysis have been performed, along with the J=12-11 and J=5-4 data in the framework of the microturbulent isothermal model. The logarithms of densities found for 4 objects lie in the range: 5.5-5.9 being ∼(0.5-1) orders of magnitude higher than mean densities. Possible models for these objects should incorporate inhomogeneous density structure.

Keywords: Interstellar clouds; infrared sources; modelling; molecules: HC3N

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/1055679021000017448

Affiliations: 1: Institute of Applied Physics, Uljanova str., 46, Nizhny Novgorod, 603950, Russia 2: Onsala Space Observatory, S-439 92, Onsala, Sweden

Publication date: February 1, 2003

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