Copernicus observational searches for OH and H2O in diffuse clouds

Details Copernicus observational searches for OH and H2O in diffuse clouds Copernicus observational searches for OH and H2O in diffuse clouds

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..435s&link_type=abstract

Astrophysical Journal, Part 1, vol. 228, Mar. 1, 1979, p. 435-438.

Astronomy and Astrophysics

Astronomy

11

Abundance, Hydroxyl Radicals, Interstellar Extinction, Molecular Absorption, Satellite Observation, Ultraviolet Absorption, Absorption Spectra, Ionic Reactions, Oao 3, Plasma Clouds, Reaction Kinetics, Spaceborne Astronomy

Scientific paper

An intensive search for OH and H2O in the directions of Sigma Sco, Alpha Cam, and Omicron 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 possibly detected toward Sigma Sco, and only an upper limit can be given toward Alpha Cam. H2O was not detected in any of the stars at the signal level accumulated. The OH abundance toward 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.

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