We discuss the colour, age and metallicity gradients in a wide sample of local SDSS early- and late-type galaxies. From the fitting of stellar population models we find that metallicity is the main driver of colour gradients and the age in the central regions is a dominant parameter which rules the scatter in both metallicity and age gradients. We find a consistency with independent observations and a set of simulations. From the comparison with simulations and theoretical considerations we are able to depict a general picture of a formation scenario.
@article{arxiv.1010.1007,
title = {Colour and stellar population gradients in galaxies},
author = {C. Tortora and N. R. Napolitano and V. F. Cardone and M. Capaccioli and P. Jetzer and R. Molinaro},
journal= {arXiv preprint arXiv:1010.1007},
year = {2010}
}
Comments
4 pages, 4 figures. Proceedings of 54th Congresso Nazionale della SAIt, Napoli 4-7 May 2010