Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Chemical Evolution of Star-Forming Galaxies Over the Last 11 Billion
  Years   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.

20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci