New clues for ionized Polycyclic Aromatic Hydrocarbons as possible carriers of Diffuse Interstellar Bands

Details New clues for ionized Polycyclic Aromatic Hydrocarbons as possible carriers of Diffuse Interstellar Bands New clues for ionized Polycyclic Aromatic Hydrocarbons as possible carriers of Diffuse Interstellar Bands

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...266l...1p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 266, no. 1, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

15

Astronomical Spectroscopy, Hydrocarbons, Interstellar Matter, Ionized Gases, Interstellar Extinction, Interstellar Gas

Scientific paper

Transition energies and transition moments (VUV spectra) of small Polycyclic Aromatic Hydrocarbons have been determined using high level correlation calculations based on effective hamiltonians specifically designed for spectroscopic purposes. The calculated energies correlate to 20 Diffuse Interstellar Bands. Addition of experimentally known vibronic transitions allows for the correlation of 11 more DIBs. An important point shown by this study is that the correlation takes place only with ionized PAHs and not with the neutral systems.

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