Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new estimate of the cosmic star formation density from a
  radio-selected sample, and the contribution of $H$-dark galaxies at $z \geq
  3$   The Star Formation Rate Density (SFRD) history of the Universe is well
constrained up to redshift $z \sim 2$. At earlier cosmic epochs, the picture
has been largely inferred from UV-selected galaxies (e.g. Lyman-break galaxies,
LBGs). However, LBGs' inferred SFRs strongly depend on the assumed dust
extinction correction, which is not well-constrained at high-$z$, while
observations in the radio domain are not affected by this issue. In this work
we measure the SFRD from a 1.4 GHz-selected sample of $\sim$600 galaxies in the
GOODS-N field up to redshift $\sim 3.5$. We take into account the contribution
of Active Galactic Nuclei from the Infrared-Radio correlation. We measure the
radio luminosity function, fitted with a modified Schechter function, and
derive the SFRD. The cosmic SFRD shows a rise up to $z \sim 2$ and then an
almost flat plateau up to $z \sim 3.5$. Our SFRD is in agreement with the ones
from other FIR/radio surveys and a factor 2 higher than those from LBG samples.
We also estimate that galaxies lacking a counterpart in the HST/WFC3 H-band
($H$-dark) make up $\sim 25\%$ of the $\phi$-integrated SFRD relative to the
full sample at z $\sim 3.2$, and up to $58\%$ relative to LBG samples.

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The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
3
The categories of this paper are: physics
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The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph