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The peculiar dust properties of the LMC and their implications on modelling SEDs of galaxies

Published online by Cambridge University Press:  17 August 2012

Frédéric Galliano
Frédéric Galliano*
Affiliation:
Service d'Astrophysique, CEA/Saclay, L'Orme des Merisiers, 91191 Gif-sur-Yvette email: frederic.galliano@cea.fr
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Abstract

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In a recent study based on the modelling of spatially resolved Spitzer and Herschel observations of the Large Magellanic Cloud (LMC), we have shown that the infrared (IR) to submillimetre (submm) grain opacities are systematically higher in the LMC than in our Galaxy. This discovery demonstrates an evolution of the dust properties with environment. Here, we discuss the consequences of this evolution on the modelling of SEDs of galaxies, emphasizing that the uncertainties on the grain properties can lead to erroneous interpretations of the structure of the interstellar medium (ISM) of galaxies, if no additional independent constraints are used.

Keywords

dustextinctiongalaxies: ISMMagellanic Clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 170 - 172
Copyright
Copyright © International Astronomical Union 2012

References

Galliano, F., Hony, S., Bernard, J.-P., et al. 2011, A&A, in pressGoogle Scholar
Roman-Duval, J., Gordon, K. D., Meixner, M., et al. 2011, in AAS Meeting 218, 129.01Google Scholar
Zubko, V., Dwek, E., & Arendt, R. G. 2004, ApJS, 152, 211Google Scholar