Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The GREATS H$\beta$+[OIII] Luminosity Function and Galaxy Properties at
  $\mathbf{z\sim8}$: Walking the Way of JWST   The James Webb Space Telescope will allow to spectroscopically study an
unprecedented number of galaxies deep into the reionization era, notably by
detecting [OIII] and H$\beta$ nebular emission lines. To efficiently prepare
such observations, we photometrically select a large sample of galaxies at
$z\sim8$ and study their rest-frame optical emission lines. Combining data from
the GOODS Re-ionization Era wide-Area Treasury from Spitzer (GREATS) survey and
from HST, we perform spectral energy distribution (SED) fitting, using
synthetic SEDs from a large grid of photoionization models. The deep
Spitzer/IRAC data combined with our models exploring a large parameter space
enables to constrain the [OIII]+H$\beta$ fluxes and equivalent widths for our
sample, as well as the average physical properties of $z\sim8$ galaxies, such
as the ionizing photon production efficiency with
$\log(\xi_\mathrm{ion}/\mathrm{erg}^{-1}\hspace{1mm}\mathrm{Hz})\geq25.77$. We
find a relatively tight correlation between the [OIII]+H$\beta$ and UV
luminosity, which we use to derive for the first time the [OIII]+H$\beta$
luminosity function (LF) at $z\sim8$. The $z\sim8$ [OIII]+H$\beta$ LF is higher
at all luminosities compared to lower redshift, as opposed to the UV LF, due to
an increase of the [OIII]+H$\beta$ luminosity at a given UV luminosity from
$z\sim3$ to $z\sim8$. Finally, using the [OIII]+H$\beta$ LF, we make
predictions for JWST/NIRSpec number counts of $z\sim8$ galaxies. We find that
the current wide-area extragalactic legacy fields are too shallow to use JWST
at maximal efficiency for $z\sim8$ spectroscopy even at 1hr depth and JWST
pre-imaging to $\gtrsim30$ mag will be required.

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The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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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: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat