Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ionizing radiation from z=4-10 galaxies   We compute the escape of ionizing radiation from galaxies in the redshift
interval z=4-10, i.e., during and after the epoch of reionization, using a
high-resolution set of galaxies, formed in fully cosmological simulations. The
simulations invoke early, energetic feedback, and the galaxies evolve into a
realistic population at z=0. Our galaxies cover nearly four orders of magnitude
in masses (10^{7.8}-10^{11.5}\msun) and more than five orders in star formation
rates (10^{-3.5}-10^{1.7}\msun\yr^{-1}), and we include an approximate
treatment of dust absorption. We show that the source-averaged Lyman-limit
escape fraction at z=10.4 is close to 80% declining monotonically with time as
more massive objects build up at lower redshifts. Although the amount of dust
absorption is uncertain to 1-1.5 dex, it is tightly correlated with
metallicity; we find that dust is unlikely to significantly impact the observed
UV output. These results support reionization by stellar radiation from
low-luminosity dwarf galaxies and are also compatible with Lyman continuum
observations and theoretical predictions at z\sim3-4.

31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con