Separate Universe simulations with IllustrisTNG: baryonic effects on power spectrum responses and higher-order statistics

@article{Barreira2019SeparateUS,
  title={Separate Universe simulations with IllustrisTNG: baryonic effects on power spectrum responses and higher-order statistics},
  author={A. Barreira and D. Nelson and A. Pillepich and V. Springel and F. Schmidt and R. Pakmor and L. Hernquist and M. Vogelsberger},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2019},
  volume={488},
  pages={2079-2092}
}
  • A. Barreira, D. Nelson, +5 authors M. Vogelsberger
  • Published 2019
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • We measure power spectrum response functions in the presence of baryonic physical processes using separate universe simulations with the IllustrisTNG galaxy formation model. The response functions describe how the small-scale power spectrum reacts to long-wavelength perturbations and they can be efficiently measured with the separate universe technique by absorbing the effects of the long modes into a modified cosmology. Specifically, we focus on the total first-order matter power spectrum… CONTINUE READING
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