Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thinking outside the halo: Tracing the large-scale distribution of
  diffuse cosmic metals with semi-analytic models   With the installation of the Cosmic Origins Spectrograph on the Hubble Space
Telescope, measurements of the metal content of the low redshift intergalactic
medium (IGM) are now available. Using a new grid-based model for diffuse gas
coupled to the SAGE semi-analytic model of galaxy formation, we examine the
impact of supernova feedback on the pollution of the IGM. We consider different
assumptions for the reheating and ejection of gas by supernovae and their
dependence on galaxy circular velocity and gas surface density. Where metals
are present, we find the most likely metallicity to be $-1.5 <
$log$_{10}$(Z/Z$_{\odot}$)$< -1.0$ at $z = 0$, consistent with both
observations and more sophisticated hydrodynamic simulations. Our model
predicts that the regions of the IGM with the highest metallicities will be
near galaxies with M$_{\star} \sim 10^{10.5}h^{-1}$M$_{\odot}$ and in
environments of densities $\sim 10 \times$ the mean. We also find that 90% of
IGM metals at $z = 0$ are ejected by galaxies with stellar masses less than
$10^{10.33}h^{-1}$M$_{\odot}$.

16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex