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OH radiation from the interstellar cloud medium

Journal Article:

Abstract

We have detected OH in the direction of about 50% of the continuum sources investigated. The OH abundance is one order of magnitude less than usually found in dust clouds. Most of the OH features have HI counterparts. This suggests that the OH radiation arises from the HI interstellar cold clouds. Our observations allowed in some cases the determination of the excitation temperatures in all four lines. A pumping model involving far-infrared radiation and collisions with neutral and charged particles has been proposed. It explains the observed excitation temperatures.
Authors:
Nguyen-Q-Rieu,; Winnberg, A; [1]  Guibert, J; [2]  Lepine, J R.D.; [3]  Johansson, L E.B.; [4]  Goss, W M [5] 
  1. Max-Planck-Institut fuer Radioastronomie, Bonn (F.R. Germany)
  2. Observatoire de Paris, Section de Meudon, 92 (France)
  3. Universidade Mackenzie, Sao Paulo (Brazil). Centro de Radio-Astronomia et Astrofisica
  4. Rymdobservatoriet, Onsala (Sweden)
  5. Commonwealth Scientific and Industrial Research Organization, Epping (Australia). Div. of Radiophysics
Publication Date:
Feb 01, 1976
Product Type:
Journal Article
Reference Number:
AIX-07-256842; EDB-77-009168
Resource Relation:
Journal Name: Astron. Astrophys.; (Germany, Federal Republic of); Journal Volume: 6:3; Other Information: 12 figs.; 9 tabs.; 31 refs
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMIC GASES; CHEMICAL COMPOSITION; HYDROXIDES; RADIOWAVE RADIATION; H1 REGIONS; ABSORPTION; COSMIC DUST; COSMIC RADIATION; FORMALDEHYDE; INTERSTELLAR SPACE; MASERS; MOLECULES; ALDEHYDES; AMPLIFIERS; COSMIC RADIO SOURCES; DUSTS; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; FLUIDS; GASES; HYDROGEN COMPOUNDS; IONIZING RADIATIONS; MICROWAVE AMPLIFIERS; MICROWAVE EQUIPMENT; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; RADIATIONS; SPACE; 640105* - Astrophysics & Cosmology- Galaxies
OSTI ID:
7333775
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: AAEJA
Submitting Site:
INIS
Size:
Pages: 413-428
Announcement Date:
Sep 01, 1976

Journal Article:

Citation Formats

Nguyen-Q-Rieu,, Winnberg, A, Guibert, J, Lepine, J R.D., Johansson, L E.B., and Goss, W M. OH radiation from the interstellar cloud medium. Germany: N. p., 1976. Web.
Nguyen-Q-Rieu,, Winnberg, A, Guibert, J, Lepine, J R.D., Johansson, L E.B., & Goss, W M. OH radiation from the interstellar cloud medium. Germany.
Nguyen-Q-Rieu,, Winnberg, A, Guibert, J, Lepine, J R.D., Johansson, L E.B., and Goss, W M. 1976. "OH radiation from the interstellar cloud medium." Germany.
@misc{etde_7333775,
title = {OH radiation from the interstellar cloud medium}
author = {Nguyen-Q-Rieu,, Winnberg, A, Guibert, J, Lepine, J R.D., Johansson, L E.B., and Goss, W M}
abstractNote = {We have detected OH in the direction of about 50% of the continuum sources investigated. The OH abundance is one order of magnitude less than usually found in dust clouds. Most of the OH features have HI counterparts. This suggests that the OH radiation arises from the HI interstellar cold clouds. Our observations allowed in some cases the determination of the excitation temperatures in all four lines. A pumping model involving far-infrared radiation and collisions with neutral and charged particles has been proposed. It explains the observed excitation temperatures.}
journal = {Astron. Astrophys.; (Germany, Federal Republic of)}
volume = {6:3}
journal type = {AC}
place = {Germany}
year = {1976}
month = {Feb}
}