1205.1897 (Yuu Niino)

The Redshift Evolution of the Relation between Stellar Mass, Star Formation Rate, and Gas Metallicity of Galaxies    [PDF]

Yuu Niino

We investigate the relation between stellar mass ($M_\star$), star formation rate (SFR), and metallicity of galaxies, so called the fundamental metallicity relation, in the galaxy sample of Sloan Digital Sky Survey Data Release 7. We separate the galaxies into narrow redshift bins and compare the relation at different redshifts, and find statistically significant ($> 99$%) evolution which is not explained solely by the effect of fiber covering fraction. In the current sample of low redshift galaxies, galaxies with different $M_\star$, and SFR are sampled from different redshifts. The separation of the intrinsic relation from the redshift evolution effect is a crucial issue to understand evolution of galaxies.

View original: http://arxiv.org/abs/1205.1897