Observing relativistic features in large-scale structure surveys – II. Doppler magnification in an ensemble of relativistic simulations

  title={Observing relativistic features in large-scale structure surveys – II. Doppler magnification in an ensemble of relativistic simulations},
  author={Louis Coates and Julian Adamek and Philip Bull and Caroline Guandalin and Chris Clarkson},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
The standard cosmological model is inherently relativistic, and yet a wide range of cosmological observations can be predicted accurately from essentially Newtonian theory. This is not the case on `ultra-large' distance scales, around the cosmic horizon size, however, where relativistic effects can no longer be neglected. In this paper, we present a novel suite of 53 fully relativistic simulations generated using the gevolution code, each covering the full sky out to $z \approx$ 0.85, and… 
2 Citations

Figures and Tables from this paper

Large-scale dark matter simulations
We review the field of collisionless numerical simulations for the large-scale structure of the Universe. We start by providing the main set of equations solved by these simulations and their
Cosmological simulations of number counts
In this paper we present for the first time the angular power spectra C ℓ(z,z') for number counts from relativistic N-body simulations. We use the relativistic N-body code gevolution with its exact


Ultra large-scale cosmology in next-generation experiments with single tracers
Future surveys of large-scale structure will be able to measure perturbations on the scale of the cosmological horizon, and so could potentially probe a number of novel relativistic effects that are
liger: mock relativistic light cones from Newtonian simulations
We introduce a method to create mock galaxy catalogues in redshift space including general relativistic effects to linear order in the cosmological perturbations. We dub our method LIGER, short for
Impact of relativistic effects on cosmological parameter estimation
Future surveys will access large volumes of space and hence very long wavelength fluctuations of the matter density and gravitational field. It has been argued that the set of secondary effects that
Isolating relativistic effects in large-scale structure
We present a fully relativistic calculation of the observed galaxy number counts in the linear regime. We show that besides the density fluctuations and redshift-space distortions, various
Newtonian and relativistic cosmologies
Cosmological N-body simulations are now being performed using Newtonian gravity on scales larger than the Hubble radius. It is well known that a uniformly expanding, homogeneous ball of dust in
A general relativistic signature in the galaxy bispectrum
Next-generation galaxy surveys will increasingly rely on the galaxy bispectrum to improve cosmological constraints, especially on primordial non-Gaussianity. A key theoretical requirement that
Hunting down horizon-scale effects with multi-wavelength surveys
Next-generation cosmological surveys will probe ever larger volumes of the Universe, including the largest scales, near and beyond the horizon. On these scales, the galaxy power spectrum carries
Relativistic wide-angle galaxy bispectrum on the light-cone
Given the important role that the galaxy bispectrum has recently acquired in cosmology and the scale and precision of forthcoming galaxy clustering observations, it is timely to derive the full
Einstein's legacy in galaxy surveys
Non-Gaussianity in the primordial fluctuations that seeded structure formation produces a signal in the galaxy power spectrum on very large scales. This signal contains vital information about the
New perspective on galaxy clustering as a cosmological probe: General relativistic effects
We present a general relativistic description of galaxy clustering in a Friedmann-Lemaitre-Robertson-Walker universe. The observed redshift and position of galaxies are affected by the matter