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Variations in the 24 μm morphologies of nearby galaxies

Published online by Cambridge University Press:  01 July 2007

G. J. Bendo
G. J. Bendo*
Affiliation:
Imperial College, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK email: g.bendo@imperial.ac.uk
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Abstract

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To study the distribution of star formation and dust emission within nearby galaxies, we measured five morphological parameters in the 24 μm wave band for 73 galaxies observed as part of the Spitzer Infrared Nearby Galaxies Survey. The morphological parameters demonstrate strong variations along the Hubble sequence, including statistically significant differences between S0/a-Sab and Sc-Sd galaxies. Early-type spiral galaxies are generally found to be compact, centralized, symmetric sources in the 24 μm band, whereas late-type spiral galaxies are generally found to be extended, asymmetric 24 μm sources. These results suggest that processes that increase the real or apparent sizes of galaxies' bulges also lead to more centralized 24 μm emission.

Keywords

infrared: galaxiesgalaxies: ISMgalaxies: structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 121 - 124
Copyright
Copyright © International Astronomical Union 2008

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