Other
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...248..128s&link_type=abstract
Astrophysical Journal, Part 1, vol. 248, Aug. 15, 1981, p. 128-131.
Other
32
Interstellar Matter, Line Spectra, Molecular Clouds, Stellar Spectra, Diffuse Radiation, High Resolution, Line Of Sight, Molecular Absorption
Scientific paper
The 6196.0 A diffuse feature is observed in various directions towards moderately and slightly reddened stars at high spectral resolution and signal to noise ratio. The feature is found to be symmetric with no fine structure with an equivalent-width upper unit paralleling that of H2. The feature is as narrow as 0.4 A, although much broader in other stars due to cloud blending in the line of sight, and is absent in all observed stars with E(B-V) less than 0.1, and upper limits more than an order of magnitude below values extrapolated from more reddened stars. Upper limits are determined by multiplying the square root of the number of channels in which the line may lie, and another narrow feature, although highly asymmetric, is observed at 6194.6 A. It is concluded that the results increase the possibility of at least one of the diffuse band carriers being a molecule.
Cochran William D.
Jura Michael
Smith William Hayden
Snow Theodore P.
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