Abundance Ratios in Early-Type Galaxies
Abstract
Although evidence is accumulating that abundance ratios in galaxies are often non-solar, they are far from understood. I resume the current evidence for non-solar abundance ratios, supplementing the recent review by Worthey (1998) with some new results. It appears that the Mg/Fe abundance ratio only depends on the mass of the galaxy, not on the formation time-scale. For massive galaxies [Mg/Fe] > 0, while small galaxies show solar abundance ratios. Information about abundances of other element is scarce, but new evidence is given that [Ca/Fe] is solar, or slightly lower than solar, contrary to what is expected for an alpha-element.
Cite
@article{arxiv.astro-ph/9904280,
title = {Abundance Ratios in Early-Type Galaxies},
author = {Reynier Peletier},
journal= {arXiv preprint arXiv:astro-ph/9904280},
year = {2007}
}
Comments
14 pages, including 5 postscript figures, uses epsf.sty. Invited review to appear in "The Evolution of Galaxies on Cosmological Timescales", eds. J.E. Beckman and T.J. Mahoney, ASP Conf. Ser