Detecting the 21 cm forest in the 21 cm power spectrum

@article{EwallWice2014DetectingT2,
  title={Detecting the 21 cm forest in the 21 cm power spectrum},
  author={A. Ewall-Wice and J. S. Dillon and A. Mesinger and J. Hewitt},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2014},
  volume={441},
  pages={2476-2496}
}
  • A. Ewall-Wice, J. S. Dillon, +1 author J. Hewitt
  • Published 2014
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • We describe a new technique for constraining the radio loud population of active galactic nuclei at high redshift by measuring the imprint of 21 cm spectral absorption features (the 21 cm forest) on the 21 cm power spectrum. Using semi-numerical simulations of the intergalactic medium and a semi-empirical source population we show that the 21 cm forest dominates a distinctive region of $k$-space, $k \gtrsim 0.5 \text{Mpc}^{-1}$. By simulating foregrounds and noise for current and potential… CONTINUE READING
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