Metallicity and mean age across M33
Abstract
New wide-field near-infrared (NIR) imaging observations of M33 were obtained from UKIRT. These show a large population of intermediate-age stars considerably improving on previous NIR data. The spatial distribution of super giant stars, carbon-rich (C-rich or C stars) and oxygen-rich (O-rich or M stars) asymptotic giant branch (AGB) stars distinguished from the NIR colour-magnitude diagram (CMD) have been studied as well as the C/M ratio. The Ks magnitude distribution has been interpreted using theoretical models to derive the mean age and the mean metallicity across M33.
Cite
@article{arxiv.0709.2949,
title = {Metallicity and mean age across M33},
author = {M. -R. L. Cioni and M. Irwin and A. M. N. Ferguson and A. McConnachie and B. C. Conn and A. Huxor and R. Ibata and G. Lewis and N. Tanvir},
journal= {arXiv preprint arXiv:0709.2949},
year = {2007}
}
Comments
4 pages, 2 figures, conference "Galaxies in the Local Volume", Sydney 8-13 July 2007, Springer Astrophysics and Space Science Proceedings, editors B. Koribalski and H. Jerjen