Evolution of the Luminosity-Metallicity-Stellar Mass correlation in a hierarchical scenario

Details Evolution of the Luminosity-Metallicity-Stellar Mass correlation in a hierarchical scenario Evolution of the Luminosity-Metallicity-Stellar Mass correlation in a hierarchical scenario

2006-03-02

arxiv.org/abs/astro-ph/0603059v1

Astronomy and Astrophysics

Astrophysics

To appear in "Groups of galaxies in the nearby Universe" ESO Workshop, (Dec 2005) Santiago, Chile

Scientific paper

We study the evolution of the Stellar Mass-Metallicity Relation and the Luminosity-Metallicity Relation by performing numerical simulations in a cosmological framework. We find that the slope and the zero point of the Luminosity-Metallicity Relation evolve in such a way that, at a given metallicity, systems were ~3 mag brighter at z=3 compared to galaxies in the local universe, which is consistent with the observational trend. The local Stellar Mass-Metallicity Relation shows also a good agreement with recent observations. We identify a characteristic stellar mass M_c ~ 10^(10.2) M_sun/h at which the slope of the Stellar Mass-Metallicity Relation decreases for larger stellar masses. Our results indicate that M_c arises naturally as a consequence of the hierarchical building up of the structure.

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