Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The clustering of Lyman alpha emitters at z=7: implications for
  reionization and host halo masses   The Ly$\alpha$ line of high-redshift galaxies has emerged as a powerful probe
of both early galaxy evolution and the epoch of reionization (EoR). Motivated
by the upcoming wide-field survey with the Subaru Hyper Suprime-Cam (HSC), we
study the angular correlation function (ACF) of narrow-band selected,
$z\approx7$ Ly$\alpha$ emitting galaxies (LAEs). The clustering of LAEs is
determined by both: (i) their typical host halo masses, $\bar{M}_{\rm h}$; and
(ii) the absorption due to a patchy EoR, characterized by an average neutral
fraction of the intergalactic medium, $\bar{x}_{\rm HI}$. We bracket the
allowed LAE ACFs by exploring extreme scenarios for both the intrinsic
Ly$\alpha$ emission and the large-scale pattern (i.e. morphology) of cosmic
ionized patches in physical EoR models. Independent of the EoR morphology,
current $z\approx 7$ ACF measurements constrain $\bar{x}_{\rm HI}\lesssim 0.5$
(1-$\sigma$). We also find that the low values of the currently-observed ACF
imply that LAEs are hosted by relatively small dark matter halos: $\bar{M}_{\rm
h} \lesssim 10^{10} M_{\odot}$, with corresponding duty cycles of $\lesssim$
few per cent. These values are over an order of magnitude lower than the
analogous ones for color-selected, Lyman break galaxies, suggesting that
$z\approx 7$ narrow-band LAEs searches are preferentially selecting young,
star-burst galaxies, residing in less massive halos. The upcoming Ultra Deep
campaign with the HSC will significantly improve constraints on both the EoR
and LAE host halos.

22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph