Other
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...401..775s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 401, no. 2, p. 775-777.
Other
14
Interstellar Chemistry, Interstellar Matter, Naphthalene, Spectral Bands, Aromatic Compounds, Cyclic Hydrocarbons, Molecular Spectra, Visible Spectrum
Scientific paper
A recent laboratory study of ionized napthalene (C10H8(+)) has led to the suggestion that some of the unidentified diffuse interstellar bands may be formed by this molecular ion in the diffuse interstellar medium. In particular, there is a close match between a laboratory feature at 6741 A and a weak diffuse band at 6742 A, and some near-coincidences at other wavelengths. The same laboratory data show that other diffuse bands may be found, including one at 6151 A, if indeed C10H8(+) is responsible. This paper reports a search for the 6151 A feature, with negative results. The derived upper limits appear to be in conflict with the C10H8(+) hypothesis, but may not be, due to uncertainties in the expected width of the predicted interstellar feature, and due to the fact that the observations do not include data on the 6742 A band, so it is not known whether this putative C10H8(+) feature is present in the observed clouds.
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