Homologous series of diffuse interstellar bands

Details Homologous series of diffuse interstellar bands Homologous series of diffuse interstellar bands

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...437..678w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 437, no. 2, p. 678-682

Astronomy and Astrophysics

Astrophysics

13

Absorption Spectra, Diffuse Radiation, Electronic Spectra, Free Electrons, Hydrocarbons, Interstellar Gas, Mathematical Models, Extrapolation, Isomers, Metastable State

Scientific paper

Recent experiments suggest that some of the stronger diffuse interstellar bands (DIBs) are due to unsaturated carbon-chain molecules. Laboratory and BIB data are here discussed in terms of the free-electron model, which relates the electronic spectra of homologous molecules of different chain lengths. Five possible series are described, From a comparison with laboratory data, it is suggested that the carrier of the 4428 A DIB, which has the largest equivalent width in most sources, is the C9 molecule, and the possibility that the metastable linear isomers of higher odd CN molecules are responsible for an observed series of DIBs is discussed.

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