Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Properties of reionization-era galaxies from JWST luminosity functions
  and 21-cm interferometry   Next generation observatories will enable us to study the first billion years
of our Universe in unprecedented detail. Foremost among these are 21-cm
interferometry with the HERA and the SKA, and high-$z$ galaxy observations with
the James Webb Space Telescope (JWST). Taking a basic galaxy model, in which we
allow the star formation rates and ionizing escape fractions to have a
power-law dependence on halo mass with an exponential turnover below some
threshold, we quantify how observations from these instruments can be used to
constrain the astrophysics of high-$z$ galaxies. For this purpose, we generate
mock JWST LFs, based on two different hydrodynamical cosmological simulations;
these have intrinsic luminosity functions (LFs) which turn over at different
scales and yet are fully consistent with present-day observations. We also
generate mock 21-cm power spectrum observations, using 1000h observations with
SKA1 and a moderate foreground model. Using only JWST data, we predict up to a
factor of 2-3 improvement (compared with HST) in the fractional uncertainty of
the star formation rate to halo mass relation and the scales at which the LFs
peak (i.e. turnover). Most parameters regulating the UV galaxy properties can
be constrained at the level of $\sim 10$% or better, if either (i) we are able
to better characterize systematic lensing uncertainties than currently
possible; or (ii) the intrinsic LFs peak at magnitudes brighter than $M_{\rm
UV} \lesssim -13$. Otherwise, improvement over HST-based inference is modest.
When combining with upcoming 21-cm observations, we are able to significantly
mitigate degeneracies, and constrain all of our astrophysical parameters, even
for our most pessimistic assumptions about upcoming JWST LFs. The 21-cm
observations also result in an order of magnitude improvement in constraints on
the EoR history.

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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: math
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The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci