The Open UniversitySkip to content

Submillimeter wavelength molecular spectroscopy of the Orion molecular cloud

White, Glenn J.; Avery, L. W.; Richardson, K. J. and Lesurf, J. C. G. (1986). Submillimeter wavelength molecular spectroscopy of the Orion molecular cloud. The Astrophysical Journal, 302 pp. 701–710.

Full text available as:
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (246kB)
Google Scholar: Look up in Google Scholar


A submillimeter wavelength spectroscopic study of the Orion molecular cloud has been made in the J = 4-3 HCN, H13CN, HCO+, H13CO+, and J = 7-6 CS molecular transitions. Densities of up to a few times 106 cm-3 are found coupled with high inferred brightness temperatures, indicating kinetic temperatures of 120 K. Evidence for lower densities in the surrounding ambient molecular cloud is presented along with maps of HCN and HCO+ emission. The maps indicate different spatial distributions in the two lines. The abundances of HCN and HCO+ in the plateau source are found to be enhanced relative to those in the surrounding molecular cloud, and there is a suggestion that a number of small-angular-diameter clumps may be present. The present observations do not confirm the previously reported detection of CO+ in the interstellar medium.

Item Type: Journal Item
Copyright Holders: 1986 The American Astronomical Society
ISSN: 1538-4357
Keywords: formyl ions; hydrocyanic acid; molecular clouds; molecular spectroscopy; Orion nebula; submillimeter waves; abundance; brightness temperature; carbon monoxide
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 33518
Depositing User: G. J. White
Date Deposited: 04 May 2012 08:34
Last Modified: 09 Dec 2018 06:57
Share this page:

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU