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Dialectics of the PAH Abundance Trend withMetallicity

Published online by Cambridge University Press:  30 March 2011

F. Galliano*
Affiliation:
Service d’Astrophysique – Laboratoire AIM, CEA/Saclay, L’Orme des Merisiers, 91191 Gif-sur-Yvette, France;. e-mail: frederic.galliano@cea.fr

Abstract

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This paper reviews the various processes that have been proposed to explain the observedtrend of PAH strength with metallicity. It summarizes a study showing that, although PAHdestruction by hard radiation is important in low-metallicity environments, it is notsufficient to explain their paucity. In these systems, the deficiency of their formationmechanism, related to stellar evolution, has to be invoked.

Type
Research Article
Copyright
© EAS, EDP Sciences 2011

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