Cosmic voids uncovered -- first-order statistics of depressions in the biased density field

Abstract

Cosmic voids are the major volume component in the matter distribution of the Universe. They posses great potential for constraining dark energy as well as for testing theories of gravity. Nevertheless, in spite of their growing popularity as cosmological probes, a gap of knowledge between cosmic void observations and theory still persists. In particular, the void size function models proposed in literature have been proven unsuccessful in reproducing the results obtained from cosmological simulations in which cosmic voids are detected from biased tracers of the density field, undermining the possibility of using them as cosmological probes. The goal of this work is to cover this gap. In particular, we make use of the findings of a previous work in which we have improved the void selection procedure, presenting an algorithm that redefines the void ridges and, consequently, their radius. By applying this algorithm, we validate the volume conserving model of the void size function on a set of unbiased simulated density field tracers. We highlight the difference in the internal structure between voids selected in this way and those identified by the popular VIDE void finder. We also extend the validation of the model to the case of biased tracers. We find that a relation exists between the tracer used to sample the underlying dark matter density field and its unbiased counterpart. Moreover, we demonstrate that, as long as this relation is accounted for, the size function is a viable approach for studying cosmology with cosmic voids.

arXiv comment11 pages, 6 figures, 3 tables, submitted to MNRAS

References in corpus (35)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The cosmological simulation code GADGET-2
• A hierarchy of voids: Much ado about nothing
• ZOBOV: a parameter-free void-finding algorithm
• The Excursion Set Theory of Halo Mass Functions, Halo Clustering, and Halo Growth
• Precision cosmography with stacked voids
• Hydrodynamical N-body simulations of coupled dark energy cosmologies
• The Aspen--Amsterdam Void Finder Comparison Project
• Universal Density Profile for Cosmic Voids
• Constraints on Cosmology and Gravity from the Dynamics of Voids
• Halos and Voids in f(R) Gravity
• Counting voids to probe dark energy
• Voids in a $\Lambda$CDM Universe
• A public void catalog from the SDSS DR7 Galaxy Redshift Surveys based on the watershed transform
• The abundance of voids and the excursion set formalism
• Voids in massive neutrino cosmologies
• Massive Neutrinos Leave Fingerprints on Cosmic Voids
• The Nonlinear Evolution of Rare Events
• Probing cosmology and gravity with redshift-space distortions around voids
• Cosmic Voids: structure, dynamics and galaxies
• Galaxy Voids in Cold Dark Matter Universes
• The Evidence of Absence: Galaxy Voids in the Excursion Set Formalism
• A measurement of the Alcock-Paczynski effect using cosmic voids in the SDSS
• The CoDECS project: a publicly available suite of cosmological N-body simulations for interacting dark energy models
• CosmoBolognaLib: C++ libraries for cosmological calculations
• On the linearity of tracer bias around voids
• Cosmic voids in coupled dark energy cosmologies: the impact of halo bias
• On the universality of void density profiles
• The nature of voids: I. Watershed void finders and their connection with theoretical models
• Cosmological exploitation of the size function of cosmic voids identified in the distribution of biased tracers
• A hierarchy of voids: More ado about nothing
• On the relative bias of void tracers in the Dark Energy Survey
• The structure of cosmic voids in a LCDM Universe
• Cosmological exploitation of cosmic void statistics - New numerical tools in the CosmoBolognaLib to extract cosmological constraints from the void size function
• Cosmic voids detection without density measurements

Cited by in corpus (22)

• The Void Size Function in Dynamical Dark Energy Cosmologies
• Precision cosmology with voids in the final BOSS data
• Cosmic voids in modified gravity models with massive neutrinos
• Euclid: Forecasts from redshift-space distortions and the Alcock-Paczynski test with cosmic voids
• Euclid: Cosmological forecasts from the void size function
• Cosmological constraints from the BOSS DR12 void size function
• Dark Energy Survey Year 1 results: The relationship between mass and light around cosmic voids
• Cosmic voids: a novel probe to shed light on our Universe
• Redshift-space effects in voids and their impact on cosmological tests. Part I: the void size function
• Redshift-space effects in voids and their impact on cosmological tests. Part II: the void-galaxy cross-correlation function
• A Parameter-Masked Mock Data Challenge for Beyond-Two-Point Galaxy Clustering Statistics
• The perspective of voids on rising cosmology tensions
• Why Cosmic Voids Matter: Nonlinear Structure & Linear Dynamics
• Exploring the cosmological synergy between galaxy cluster and cosmic void number counts
• C${}^3$-Cluster Clustering Cosmology II. First detection of the BAO peak in the three-point correlation function of galaxy clusters
• Measurement of Void Bias Using Separate Universe Simulations
• How do galaxy properties affect void statistics?
• Machine-learning cosmology from void properties
• The CIDER simulations: Nonlinear structure formation in the Constrained Interacting Dark Energy Scenario
• Unveiling the Universe with Emerging Cosmological Probes
• Constraining cosmological parameters using void statistics from the SDSS survey
• Cosmology with Cosmic Voids