Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SPITZER Observations of z~3 Lyman Break Galaxies: stellar masses and
  mid-infrared properties   We describe the spectral energy distributions (SEDs) of Lyman Break Galaxies
(LBGs) at z~3 using deep mid-infrared and optical observations of the Extended
Groth Strip, obtained with IRAC and MIPS on board Spitzer and from the ground,
respectively. We focus on LBGs with detections at all four IRAC bands, in
particular the 26 galaxies with IRAC 8 micron band (rest--frame K-band)
detections. We use stellar population synthesis models and probe the stellar
content of these galaxies. Based on best--fit continuous star-formation models
we derive estimates of the stellar mass for these LBGs. As in previous studies,
we find that a fraction of LBGs have very red colors and large estimated
stellar masses (M_stellar > 5 x 10 ^{10} M_solar): the present Spitzer data
allow us, for the first time, to study these massive LBGs in detail. We discuss
the link between these LBGs and submm-luminous galaxies.We find that the number
density of these massive LBGs at high redshift is higher than predicted by
current semi-analytic models of galaxy evolution.

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The categories of this paper are: nucl-th
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The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org