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PAHs and the ISM in Metal-Poor Starbursts

Published online by Cambridge University Press:  30 March 2011

C. Joblin ,
A.G.G.M. Tielens ,
L.K. Hunt ,
Y.I. Izotov ,
M. Sauvage  and
T.X. Thuan
L.K. Hunt
Affiliation:
INAF-Osservatorio di Arcetri, Firenze, Italy
Y.I. Izotov
Affiliation:
Main Astronomical Observatory, Kiev, Ukraine
M. Sauvage
Affiliation:
CEA, Saclay, France
T.X. Thuan
Affiliation:
University of Virginia, Charlottesville, USA

Abstract

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We characterize PAH populations in 22 metal-poor blue compact dwarf galaxies (BCDs), 16 of which have an oxygen abundance 12+log(O/H) ≲ 8. This is the largest sample ever studied at such low metallicities. The relative PAH intensities of the 6.2, 7.7, 8.6 and 11.3 μm features in these BCDs suggest a deficit of small PAH carriers, or alternatively, an excess of large ones at these low abundances.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 46: PAHs and the Universe: A Symposium to Celebrate the 25th Anniversary of the PAH Hypothesis , 2011 , pp. 143 - 148
Copyright
© EAS, EDP Sciences 2011

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