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CO J = 3 - 2 and submillimetre continuum observations of two molecular outflow sources

Phillips, J. P., White, G. J., Ade, Peter A. R., Cunningham, C. T., Richardson, K. J., Robson, E. I. and Watt, G. D. 1982. CO J = 3 - 2 and submillimetre continuum observations of two molecular outflow sources. Astronomy and Astrophysics 116 (1) , pp. 130-136.

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Abstract

Results are presented for observations of two molecular-outflow sources, the dark cloud L1551 and the late-type variable star IRC+10216, in the J = 3 - 2 transition of CO (345 GHz) and in the far-IR at wavelengths of 377, 811, and 1136 microns. It is found that strong velocity gradients are present in the CO emission zones of L1551, implying small optical depths and relatively high densities, and that the central source (IRS 5) exhibits an IR excess that is not explainable in terms of a single-temperature continuum. The far-IR continuum of IRC+10216 is synthesized by assuming a particular distribution of optically thin grains. The CO J = 3 - 2 spectrum of the star is shown to imply a variable mass-loss rate.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Carbon Monoxide, Electron Transitions, Molecular Spectra, Stellar Evolution, Stellar Mass Ejection, Variable Stars, Interstellar Gas, Late Stars, Line Spectra, Stellar Winds, Velocity Distribution
Publisher: EDP Sciences
ISSN: 0004-6361
Last Modified: 04 Jun 2017 08:20
URI: http://orca.cf.ac.uk/id/eprint/76003

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