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Astronomical Models of PAHs and Dust

Published online by Cambridge University Press:  30 March 2011

C. Joblin ,
A.G.G.M. Tielens  and
B.T. Draine
B.T. Draine*
Affiliation:
Dept. of Astrophysical Sciences, Princeton University

Abstract

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Physical dust models which include a PAH component are quite successful in reproducingthe measured extinction vs. wavelength in the Milky Way, the infrared(IR) emission observed from Milky Way regions and other galaxies, and a number of otherobservational constraints. Many of the adopted PAH properties are necessarily highlyidealized.

The observed variations in the 7.7 μm/11.3 μm bandratio can be reproduced by varying the PAH ionization balance. Changing the spectrum ofthe starlight heating the PAHs affects the overall strength of the PAH emission (relativeto total IR), but has relatively little effect on the 7.7 μm/11.3μm band ratio.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 46: PAHs and the Universe: A Symposium to Celebrate the 25thAnniversary of the PAH Hypothesis , 2011 , pp. 29 - 42
Copyright
© EAS, EDP Sciences 2011

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