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A Critical Review of PAHs as DIB Carriers - Progress and Open Questions

Published online by Cambridge University Press:  21 February 2014

F. Salama  and
P. Ehrenfreund
F. Salama
Affiliation:
NASA Ames Research Center, Space Science & Astrobiology Division, Moffett Field, California 94035, USA email: farid.salama@nasa.gov
P. Ehrenfreund
Affiliation:
Space Policy Institute, George Washington University Washington DC, USA email: pehren@gwu.edu
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Abstract

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PAHs are among the most commonly proposed and popular candidates for DIB carriers. We present a critical assessment of the PAH-DIB model in view of the progress and the advances that have recently been achieved through a series of complementary studies involving astronomical observations of DIBs, laboratory simulation of interstellar analogs for PAHs (neutrals and ions), space exposure experiments of PAHs, theoretical calculations of PAH spectra and the modeling of diffuse and translucent interstellar clouds. What have we learned from these complementary studies? What are the constraints that can now be derived for the PAHs as DIB carriers? What are the strengths and the weaknesses of the PAH model to account for the DIBs?

Keywords

ISM: lines and bandsISM: moleculesionslaboratorymolecular data
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 364 - 369
Copyright
Copyright © International Astronomical Union 2014 

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