Non-parametric galaxy morphology from the far-UV to the far-IR

Numerical morphology estimators constitute an invaluable tool in the era of 
large galaxy surveys. On one hand, they can be automatically measured on 
samples of thousands of galaxies. On the other hand, since they are not tied to 
a set of predefined morphological types, numerical estimators can be used to 
compare galaxy morphology at different wavelengths and/or redshifts, where the 
classical Hubble types may not apply. Here I present a suite of widely used 
non-parametric estimators (concentration index, asymmetry, second order moment 
and Gini coefficient) measured in more than 20 photometric bands, all the way 
from the far-UV to the far-IR, for the galaxies in the SINGS sample. This study 
provides a detailed quantitative comparison of the spatial distribution of 
stars (of different ages), gas and dust in nearby galaxies, and constitutes an 
excellent benchmark for galaxy morphology studies at high redshift.