Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing possible effects of circumgalactic media on the metal content of
  galaxies through the mass-metallicity relationship   The circumgalactic medium (CGM) connects the gas between the interstellar
medium (ISM) and the intergalactic medium, which plays an important role in
galaxy evolution. We use the stellar mass-metallicity relationship to
investigate whether sharing the CGM will affect the distribution of metals in
galaxy pairs. The optical emission lines from the Sloan Digital Sky Survey Data
Release (SDSS DR7) are used to measure the gas-phase metallicity. We find that
there is no significant difference in the distribution of the metallicity
difference between two members in star forming-star forming pairs ($\rm \Delta
log(O/H)_{diff}$), metallicity offset from the best-fitted stellar
mass-metallicity relationship of galaxies in pairs ($\rm \Delta
log(O/H)_{MS}$), as compared to "fake" pairs. By looking at $\rm \Delta
log(O/H)_{diff}$ and $\rm \Delta log(O/H)_{MS}$ as a function of the star
formation rate (SFR), specific star formation rate (sSFR), and stellar mass
ratio, no difference is seen between galaxies in pairs and control galaxies.
From our results, the share of the CGM may not play an important role in
shaping the evolution of metal contents of galaxies.

12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex