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The Chemical Evolution of Star-Forming Galaxies Over the Last 11 Billion Years by Zahid, H. Jabran; Geller, Margaret; Kewley, Lisa; Hwang, Ho Seong; Fabricant, Daniel; Kurtz, Michael is a scholarly article available to read on EtoBox.

What is The Chemical Evolution of Star-Forming Galaxies Over the Last 11 Billion Years about?

We calculate the stellar mass-metallicity relation at five epochs ranging to z~2.3. We quantify evolution in the shape of the mass-metallicity relation as a function of redshift; the mass-metallicity relation flattens at late times. There is an empirical upper limit to the gas-phase oxygen abundance in star-forming galaxies that is independent of redshift. From examination of the mass-metallicity relation and its observed scatter we show that the flattening at late times is a consequence of evolution in the stellar mass where galaxies enrich to this empirical upper metallicity limit; there is also evolution in the fraction of galaxies at a fixed stellar mass that enrich to this limit. The stellar mass where metallicities begin to saturate is ~0.7 dex smaller in the local universe than it is at z~0.8.

Author

Zahid, H. Jabran; Geller, Margaret; Kewley, Lisa; Hwang, Ho Seong; Fabricant, Daniel; Kurtz, Michael

Published

2013

Language

EN