Hunting down systematics in baryon acoustic oscillations after cosmic high noon

Abstract

Future dark energy experiments will require better and more accurate theoretical predictions for the baryonic acoustic oscillations (BAO) signature in the spectrum of cosmological perturbations. Here, we use large N-body simulations of the \LambdaCDM Planck cosmology to study any possible systematic shifts and damping in BAO due to the impact of nonlinear gravitational growth of structure, scale dependent and non-local bias, and redshift-space distortions. The effect of cosmic variance is largely reduced by dividing the tracer power spectrum by that from a BAO-free simulation starting with the same phases. This permits us to study with unprecedented accuracy (better than 0.02% for dark matter and 0.07% for low-bias halos) small shifts of the pristine BAO wavenumbers towards larger k, and non-linear damping of BAO wiggles in the power spectrum of dark matter and halo populations in the redshift range z=0-1. For dark matter, we provide an accurate parametrization of the evolution of αas a function of the linear growth factor D(z). For halo samples, with bias ranging from 1.2 to 2.8, we measure a typical BAO shift of ~0.25%, observed in real-space, which does not show an appreciable evolution with redshift within the uncertainties. Moreover, we report a constant shift as a function of halo bias. We find a different evolution of the damping of the acoustic feature in all halo samples as compared to dark matter with haloes suffering less damping, and also find some weak dependence on bias. A larger BAO shift and damping is measured in redshift-space which can be well explained by linear theory due to redshift-space distortions. A clear modulation in phase with the acoustic scale is observed in the scale-dependent halo bias due to the presence of the baryonic acoustic oscillations.

11 pages, 9 figures

References in corpus (19)

• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• Resumming Cosmological Perturbations via the Lagrangian Picture: One-loop Results in Real Space and in Redshift Space
• Nonlinear Evolution of Baryon Acoustic Oscillations
• On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter
• The detectability of baryonic acoustic oscillations in future galaxy surveys
• `Eppur Si Muove': On The Motion of the Acoustic Peak in the Correlation Function
• Non-linear structure formation and the acoustic scale
• Full-Sky Weak Lensing Simulation with 70 Billion Particles
• Calibrating the Baryon Oscillation Ruler for Matter and Halos
• Simulations of Baryon Acoustic Oscillations II: Covariance matrix of the matter power spectrum
• Galaxy Bias and its Effects on the Baryon Acoustic Oscillations Measurements
• Dark Sky Simulations: Early Data Release
• The BigBOSS Experiment
• Constraining the halo bispectrum in real and redshift space from perturbation theory and non-linear stochastic bias
• What is the best way to measure baryonic acoustic oscillations?
• Cosmic variance limited Baryon Acoustic Oscillations from the DEUS-FUR $\Lambda$CDM simulation
• Galaxy formation on the largest scales: The impact of astrophysics on the BAO peak
• DEUS Full Observable ΛCDM Universe Simulation: the numerical challenge

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• The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from multi-tracer BAO analysis with galaxies and voids
• Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys
• Response function of the large-scale structure of the universe to the small scale inhomogeneities
• Measuring Baryon Acoustic Oscillations from the clustering of voids
• MultiDarkLens Simulations: weak lensing light-cones and data base presentation
• The redshift distribution of cosmological samples: a forward modeling approach
• Fast Weak Lensing Simulations with Halo Model
• Accurate Baryon Acoustic Oscillations reconstruction via semi-discrete optimal transport
• Baryon acoustic oscillations in thin redshift shells from BOSS DR12 and eBOSS DR16 galaxies
• Phenomenology of BAO evolution from Lagrangian to Eulerian Space
• The Past History of Galaxy Clusters told by their present neighbors
• Cosmic void exclusion models and their impact on the distance scale measurements from large scale structure
• Testing the Reliability of Fast Methods for Weak Lensing Simulations: WL-MOKA on PINOCCHIO
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• Weak Lensing the non-Linear Ly-alpha Forest
• Variational autoencoder for generating realistic $N$-body simulations for dark matter halos
• Iterative reconstruction excursions for Baryon Acoustic Oscillations and beyond