Emission model of AIBs: the case of the 11.2 λm band

Details Emission model of AIBs: the case of the 11.2 λm band Emission model of AIBs: the case of the 11.2 λm band

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.111c&link_type=abstract

The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole

Astronomy and Astrophysics

Astronomy

Scientific paper

Amongst the Aromatic Infrared Bands (AIBs), the strong 11.2 λm feature has a very distinctive shape with a steep blue side and a long red tail. Making use of these characteristics, modelling of this feature is taken as the starting point in assessing classes of molecules as carriers of all of the AIBs. Quantum chemical calculations on a set of large Polycyclic Aromatic Hydrocarbons (PAHs) are carried out using DFT. The infrared transitions obtained are then used to model the astronomical emission spectrum including the 11.2 λm band. Conclusions are drawn in terms of goodness of the fit for the 11.2 λm feature and for the overall 3-20 λm AIB spectrum.

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