Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..68...19d&link_type=abstract
Astrophysics and Space Science, vol. 68, no. 1, Mar. 1980, p. 19-26.
Astronomy and Astrophysics
Astrophysics
3
Interstellar Chemistry, Interstellar Matter, Magnesium Compounds, Porphyrins, Spectroscopic Analysis, Absorption Spectra, Infrared Spectroscopy, Line Spectra, Photochemical Reactions, Spectral Bands
Scientific paper
The visible and infrared spectra and thermal behavior of the bis-pyridal-magnesium-tetrabenz-porphyrin molecule proposed as the carrier of the diffuse interstellar bands were measured. Of the six band coincidences reported by Johnson (1977), only one, 4430 A, occurs in these experiments. This coincidence requires a special environment, not likely to occur in interstellar space but the infrared spectrum does not support Johnson's vibrational scheme. These spectroscopic and thermal measurements contradict the hypothesis that this molecule causes the diffuse bands.
Donn Bertram
Khanna Raj K.
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