Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...431l.151f&link_type=abstract
The Astrophysical Journal, vol. 431, no. 2, pt. 2, p. L151-L154
Astronomy and Astrophysics
Astrophysics
22
Interstellar Gas, Molecules, Absorption Spectra, Interplanetary Dust, Kinetic Energy
Scientific paper
Absorption spectra of highly unsaturated hydrocarbons were obtained in 5 K neon matrices by means of an approach which combines mass-selection and matrix isolation techniques. Mass-selected carbon species, Cn Hm(-) with n = 14 or 16 and m less than 3, were condensed with neon to form a matrix at 5 K using concomitant mercury lamp irradiation. In the 600-860 nm region, many of the observed electronic absorption bands lie close to known diffuse interstellar bands (DIBs); the matches are especially striking above 700 nm. For the hitherto studied species, comprised of 6 to 16 carbons, 17 bands above 600 nm 'coincide' with DIBs within +/- 36 cm-1, the criterion chosen to accommodate a possible neon matrix-gas phase shift. The observation of the first members of vibrational progressions for some of the bands with corresponding DIBs allows predictions for astrophysical studies to test this proposal.
Freivogel P.
Fulara Jan
Maier John P.
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