The Open UniversitySkip to content

A 257-273 GHz spectral survey of the OMC1 cloud core

Greaves, J. S. and White, Glenn J. (1991). A 257-273 GHz spectral survey of the OMC1 cloud core. Astronomy & Astrophysics, 91 pp. 237–258.

Full text available as:
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (459Kb)
Google Scholar: Look up in Google Scholar


A spectral line survey of the OMC1 cloud core has been obtained, over the frequency range 257.04-273.02 GHz, using the James Clerk Maxwell 15-m submillimeter telescope. Additional observations have been made centered at 229.4, 231.2, 237.3, and 239.1 GHz. A new algorithm was used to deconvolve the original double-sideband data, and its performance is critically discussed.

181 distinct spectral lines were detected, ~ 7 of which are not identifiable with known molecular transitions. Between 18 and 21 molecular species were detected, including up to 10 isotopically-substituted forms. The line strengths are greater by a factor of 1.9 (on average) than in an earlier OVRO survey orf similar frequencies, made using a larger beam. The current results therefore provide a substantial data base of typical line strengths for future high-resolution studies of the OMC1 core.

Item Type: Journal Article
Copyright Holders: 1991 European Southern Observatory
ISSN: 1286-4846
Keywords: interstellar matter; line spectra; microwaves; molecular clouds; radio astronomy; algorithms; electron transitions; frequency ranges; radio telescopes
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 33337
Depositing User: G. J. White
Date Deposited: 25 May 2012 09:29
Last Modified: 28 Jan 2016 15:38
Share this page:

Actions (login may be required)

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340