Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Empirically-Calibrated Model For Interpreting the Evolution of
  Galaxies During the Reionization Era   [Abridged] We develop a simple star formation model whose goal is to
interpret the emerging body of observational data on star-forming galaxies at
z>~6. The efficiency and duty cycle of the star formation activity within dark
matter halos are determined by fitting the luminosity functions of Lya emitter
and Lyman-break galaxies at redshifts z~5-6. Using our model parameters we
predict the likely abundance of star forming galaxies at earlier epochs and
compare these to the emerging data in the redshift interval 7<z<10. We find
that the abundance of luminous Lyman-break galaxies in the 500 Myr between z~6
and 10 can be naturally explained by the hierarchical assembly of dark matter
haloes; there is only marginal evidence for strong physical evolution. In
contrast, the first estimates of the abundance of less luminous star forming
galaxies at z=9-10 are higher than predicted and, if verified by further data,
may suggest a top-heavy stellar mass function at these early epochs. Although
these abundances remain uncertain because of the difficulty of spectroscopic
confirmation and cosmic variance, even a modest improvement in survey
capability with present or upcoming facilities should yield great progress. In
this context, we use our model to consider those observational techniques that
hold the most promise and make predictions for specific surveys that are, or
will soon be, underway. We conclude that narrowband Lya emitter surveys should
be efficient on searches at z~7-8; however, such conventional surveys are
unlikely to detect sufficient galaxies at z~10 to provide useful constraints.
For this reason, gravitational lensing offers the best prospect for probing the
z~10 universe prior to JWST.

17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
16
The categories of this paper are: stat
2
The categories of this paper are: math
7
The categories of this paper are: hep-th