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Detection of submillimeter (870-µm) CO emission from the Orion molecular cloud

Phillips, T. G. and Neugebauer, G. and Werner, M. W. and Huggins, P. J. (1977) Detection of submillimeter (870-µm) CO emission from the Orion molecular cloud. Astrophysical Journal, 217 (1). L161-L164. ISSN 0004-637X. doi:10.1086/182561.

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We report the first measurements of the interstellar J = 3 to J = 2 carbon monoxide line at a wavelength of 870 μm (346 GHz). Observations of the Orion molecular cloud were made with a heterodyne bolometer receiver at the prime focus of the Hale 5 m telescope. A major feature of the observed spectra is the great strength of the high-velocity wings of the line. The position and spatial extent of the region of high-velocity emission are determined and compared with shock wave models for CO and H_2 emission. It is concluded that the high-velocity gas is probably at or near the front face of the molecular cloud and has a kinetic temperature ≳ 100 K a mass ≳ 10 M_☉ and a density n_H, ≳ 5 X 10^5 cm^(-3).

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Additional Information:© 1977 American Astronomical Society. Received 1977 July 25; accepted 1977 August 11. We wish to thank the staff of the Hale Observatories for their kind and efficient assistance; Ronald Miller and Gordon Forrester for technical assistance in preparation of the detector system; R. Linke for donating the harmonic generator diodes; J. Y. Kwan, B. Zuckerman, E. Becklin, S. Beckwith, I. Gatley, K. Matthews, and S. Persson for several helpful discussions; and P. G. Wannier and D. Ennis for assistance with the observations. This work is supported in part by National Aeronautics and Space Administration grant NGL 05-002-207.
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NASANGL 05-002-207
Subject Keywords:interstellar: molecules nebulae: Orion Nebula
Issue or Number:1
Record Number:CaltechAUTHORS:20170303-153445815
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Official Citation:Detection of submillimeter /870-micron/ CO emission from the Orion molecular cloud Phillips, T. G., Neugebauer, G., Werner, M. W., & Huggins, P. J. Astrophysical Journal, Part 2 - Letters to the Editor, vol. 217, Nov. 1, 1977, p. L161-L164.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74733
Deposited By: Ruth Sustaita
Deposited On:06 Mar 2017 15:55
Last Modified:11 Nov 2021 05:29

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