Separate Universe Void Bias

Abstract

Voids have emerged as a novel probe of cosmology and large-scale structure. These regions of extreme underdensity are sensitive to physics beyond the standard model of cosmology, and can potentially be used as a testing ground to constrain new physics. We present the first determination of the linear void bias measured in separate universe simulations. Our methods are validated by comparing the separate universe response bias with the clustering bias of voids. We find excellent agreement between the two methods for voids identified in the halo field and the down-sampled dark matter field. For voids traced by halos, we identify two different contributions to the bias. The first is due to the bias of the underlying halo field used to identify voids, while the second we attribute to the dynamical impact of long-wavelength density perturbations on void formation and expansion. By measuring these contributions individually, we demonstrate that their sum is consistent with the total void bias. We also measure the void profiles in our simulations, and determine their separate universe response. These can be interpreted as the sensitivity of the profiles to the background density of the Universe.

arXiv comment14 pages, 8 figures

References in corpus (67)

• The cosmological simulation code GADGET-2
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
• Transients from Initial Conditions in Cosmological Simulations
• Single field consistency relation for the 3-point function
• A hierarchy of voids: Much ado about nothing
• ZOBOV: a parameter-free void-finding algorithm
• Toward a Measurement of the Cosmological Geometry at z~2: Predicting Lyman-alpha Forest Correlation in Three Dimensions, and the Potential of Future Data Sets
• Precision cosmography with stacked voids
• The Aspen--Amsterdam Void Finder Comparison Project
• Super-Sample Covariance in Simulations
• Photometric Properties of Void Galaxies in the Sloan Digital Sky Survey
• Constraints on Cosmology and Gravity from the Dynamics of Voids
• Initial conditions to cosmological N-body simulations, or how to run an ensemble of simulations
• Halos and Voids in f(R) Gravity
• Counting voids to probe dark energy
• Precision measurement of the local bias of dark matter halos
• Voids in Modified Gravity: Excursion Set Predictions
• Spectroscopic Properties of Void Galaxies in the Sloan Digital Sky Survey
• The darkness that shaped the void: dark energy and cosmic voids
• Precision cosmology with voids: definition, methods, dynamics
• The abundance of voids and the excursion set formalism
• A first application of the Alcock-Paczynski test to stacked cosmic voids
• Spatial and Dynamical Properties of Voids in a LCDM Universe
• Voids in massive neutrino cosmologies
• Massive Neutrinos Leave Fingerprints on Cosmic Voids
• Separate Universe Simulations
• Probing cosmology and gravity with redshift-space distortions around voids
• The Santiago-Harvard-Edinburgh-Durham void comparison I: SHEDding light on chameleon gravity tests
• Simulating nonlinear cosmological structure formation with massive neutrinos
• Cosmology with Void-Galaxy Correlations
• Position-dependent power spectrum of the large-scale structure: a novel method to measure the squeezed-limit bispectrum
• A measurement of the Alcock-Paczynski effect using cosmic voids in the SDSS
• Voids as a Precision Probe of Dark Energy
• Clues on void evolution I: Large scale galaxy distributions around voids
• Constraining the Dark Energy Equation of State with Cosmic Voids
• Large-Scale Clustering of Cosmic Voids
• Super-Sample Signal
• On Separate Universes
• Implementing the DC Mode in Cosmological Simulations with Supercomoving Variables
• Cosmic Voids in the SDSS DR12 BOSS Galaxy Sample: The Alcock-Paczynski Test
• The Santiago-Harvard-Edinburgh-Durham void comparison II: unveiling the Vainshtein screening using weak lensing
• Signatures of the Primordial Universe from Its Emptiness: Measurement of Baryon Acoustic Oscillations from Minima of the Density Field
• Using Voids to Unscreen Modified Gravity
• Scale-dependent bias and bispectrum in neutrino separate universe simulations
• Modelling Void Abundance in Modified Gravity
• Testing cosmology with a catalogue of voids in the BOSS galaxy surveys
• Cosmological exploitation of the size function of cosmic voids identified in the distribution of biased tracers
• Separate Universe Consistency Relation and Calibration of Halo Bias
• Linear response to long wavelength fluctuations using curvature simulations
• The nature of voids: II. Tracing underdensities with biased galaxies
• An accurate linear model for redshift space distortions in the void-galaxy correlation function
• Voids in Modified Gravity Reloaded: Eulerian Void Assignment
• The Persistent Percolation of Single-Stream Voids
• Testing cosmic geometry without dynamic distortions using voids
• Origami constraints on the initial-conditions arrangement of dark-matter caustics and streams
• Super-Sample CMB Lensing
• Constraint of Void Bias on Primordial non-Gaussianity
• Clustering and Bias Measurements of SDSS Voids
• Separating the Universe into the Real and Fake
• Halo assembly bias from Separate Universe simulations
• Quintessential Scale Dependence from Separate Universe Simulations
• The Void Galaxy Survey
• The sparkling Universe: Clustering of voids and void clumps
• Quintessential Isocurvature in Separate Universe Simulations
• Effect of Dark Energy Perturbation on Cosmic Voids Formation

Cited by in corpus (11)

• Large-scale dark matter simulations
• The bias of cosmic voids in the presence of massive neutrinos
• Euclid: Forecasts from the void-lensing cross-correlation
• The position-dependent matter density probability distribution function
• Super-sample covariance of the power spectrum, bispectrum, halos, voids, and their cross covariances
• Volume Statistics as a Probe of Large-Scale Structure
• Measurement of Void Bias Using Separate Universe Simulations
• Intrinsic alignments of galaxies around cosmic voids
• Position-dependent Voronoi probability distribution functions for matter and halos
• Scale-dependent halo bias and the squeezed limit bispectrum in the presence of radiation
• Cosmic voids and BAO with relative baryon-CDM perturbations