Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A K-band Selected Photometric Redshift Catalog in the HDF-S: Sampling
  the Rest-Frame V-Band to z=3   We present the first results from the Faint Infra-Red Extragalactic Survey
(FIRES) of the Hubble Deep Field South. Using a combination of deep near
infrared data obtained with ISAAC at the VLT with the WFPC2 HST data, we
construct a K-band selected sample of 136 galaxies with K(AB)<=23.5. We derive
zphot's using a newly developed technique which models the observed spectral
energy distribution with a linear combination of empirical galaxy templates.
Testing our zphot technique against spectroscopic redshifts in the HDF-N yields
dz/(1+z)~0.07 for z<6. We show that we can derive realistic error estimates in
zphot by combining the systematic uncertainties derived from the HDF-N with
errors in zphot which depend on the observed flux errors. The redshift
histogram of galaxies in the HDF-S shows distinct structure with a sharp peak
at z~0.5 and a broad enhancement at z~1-1.4. We find that 12% of our galaxies
with K(vega)<21 lie at z>=2. While this is higher than the fraction predicted
in Omega_M=1 hierarchical models of galaxy formation we find that published
predictions using pure luminosity evolution models produce too many bright
galaxies at redshifts greater than unity. Finally, we use our broad wavelength
coverage to measure the rest-frame UBV luminosities Lrest for z<=3. There is a
paucity of galaxies brighter than Lrest_V>=1.4e10 h^{-2}Lsun at z~1.5-2,
however, at z>2 we find very luminous galaxies with Lrest_V>=5e10 h^{-2}Lsun
(for Omega_M=0.3,Lambda=0.7, H_o=100 h km s^{-1}Mpc^{-1}). Local B-band
luminosity functions predict 0.1 galaxies in the redshift range 2<=z<=3.5 and
with Lrest_B>= 5e10 h^{-2}Lsun,B but we find 9. The discrepancy can be
explained if L*_B increases by a factor of 2.4-3.2 with respect to locally
determined values (abridged).

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The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas