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Copernicus observational searches for OH and H2O in diffuse clouds (1983)

Smith, W. H. ; Snow, T. P., Jr.

In: CASI

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Publication Date: 2019-06-28

Description: An intensive search for OH and H2O in the directions of sigma Sco, alpha Cam, and micron Per was undertaken with the Copernicus satellite. Multiple scans were carried out over the wavelength region for the expected absorption features due to the OH D-X and H2O C-X transitions. The feature due to OH was detected marginally towards sigma Sco, and only an upper limit can be given towards alpha Cam. H2O was not detected in any of the stars at the signal level accumulated. The OH abundance towards sigma Sco and the respective lower limits for the OH/H2O ratios are discussed with regard to the extant models for the steady state abundances of OH and H2O, and shown not to be inconsistent with ion-molecule schemes.

Keywords: ASTRONOMY

Type: NASA-CR-170601 , NAS 1.26:170601

Format: application/pdf

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