The galaxy bias profile of cosmic voids

Abstract

Cosmic voids are underdense regions within the large-scale structure of the Universe, spanning a wide range of physical scales - from a few megaparsecs (Mpc) to the largest observable structures. Their distinctive properties make them valuable cosmological probes and unique laboratories for galaxy formation studies. A key aspect to investigate in this context is the galaxy bias, $b$, within voids - that is, how galaxies in these underdense regions trace the underlying dark-matter density field. We want to measure the dependence of the large-scale galaxy bias on the distance to the void center, and to evaluate whether this bias profile varies with the void properties and identification procedure. We apply a void identification scheme based on spherical overdensities to galaxy data from the IllustrisTNG magnetohydrodynamical simulation. For the clustering measurement, we use an object-by-object estimate of large-scale galaxy bias, which offers significant advantages over the standard method based on ratios of correlation functions or power spectra. We find that the average large-scale bias of galaxies inside voids tends to increase with void-centric distance when normalized by the void radius. For the entire galaxy population within voids, the average bias rises with the density of the surrounding environment and, consequently, decreases with increasing void size. Due to this environmental dependence, the average galaxy bias inside S-type voids - embedded in large-scale overdense regions - is significantly higher ($⟨b{⟩}_{\mathrm{in}}>0$) at all distances compared to R-type voids, which are surrounded by underdense regions ($⟨b{⟩}_{\mathrm{in}}<0$). The bias profile for S-type voids is also slightly steeper. Since both types of voids host halo populations of similar mass, the measured difference in bias can be interpreted as a secondary bias effect.

arXiv commentSubmitted to A&A, comments welcome

References in corpus (128)

• Planck 2015 results. XIII. Cosmological parameters
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• Simulating Galaxy Formation with the IllustrisTNG Model
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• First results from the IllustrisTNG simulations: the stellar mass content of groups and clusters of galaxies
• First results from the IllustrisTNG simulations: the galaxy color bimodality
• An analytic model for the spatial clustering of dark matter haloes
• Properties of galaxies reproduced by a hydrodynamic simulation
• First results from the IllustrisTNG simulations: A tale of two elements -- chemical evolution of magnesium and europium
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• The Large Scale Bias of Dark Matter Halos: Numerical Calibration and Model Tests
• An excursion set model of hierarchical clustering: Ellipsoidal collapse and the moving barrier
• The Connection between Galaxies and their Dark Matter Halos
• The age dependence of halo clustering
• Properties of Dark Matter Haloes in Clusters, Filaments, Sheets and Voids
• A hierarchy of voids: Much ado about nothing
• Evolution of the cosmic web
• ZOBOV: a parameter-free void-finding algorithm
• On the environmental dependence of halo formation
• A Cosmic Watershed: the WVF Void Detection Technique
• Cosmic Voids in Sloan Digital Sky Survey Data Release 7
• Precision cosmography with stacked voids
• The Aspen--Amsterdam Void Finder Comparison Project
• The structure of voids
• Photometric Properties of Void Galaxies in the Sloan Digital Sky Survey
• Constraints on Cosmology and Gravity from the Dynamics of Voids
• Counting voids to probe dark energy
• Voids in Modified Gravity: Excursion Set Predictions
• Spectroscopic Properties of Void Galaxies in the Sloan Digital Sky Survey
• The Luminosity Function of Void Galaxies in the Sloan Digital Sky Survey
• Voids in a $\Lambda$CDM Universe
• The darkness that shaped the void: dark energy and cosmic voids
• On The Validity of the Streaming Model for the Redshift-Space Correlation Function in the Linear Regime
• A public void catalog from the SDSS DR7 Galaxy Redshift Surveys based on the watershed transform
• Precision cosmology with voids: definition, methods, dynamics
• The Void Galaxy Survey: Optical Properties and H I Morphology and Kinematics
• The Cosmic Web: Geometric Analysis
• Massive Neutrinos Leave Fingerprints on Cosmic Voids
• The Properties of Galaxies in Voids
• The Hierarchical Structure and Dynamics of Voids
• Beyond BAO: improving cosmological constraints from BOSS with measurement of the void-galaxy cross-correlation
• Probing cosmology and gravity with redshift-space distortions around voids
• Halo assembly bias and the tidal anisotropy of the local halo environment
• The Santiago-Harvard-Edinburgh-Durham void comparison I: SHEDding light on chameleon gravity tests
• Cosmic Voids: structure, dynamics and galaxies
• The Cosmic Ballet: spin and shape alignments of haloes in the cosmic web
• Cosmology with Void-Galaxy Correlations
• Clues on void evolution II: Measuring density and velocity profiles on SDSS galaxy redshift space distortions
• Redshift space correlations and scale-dependent stochastic biasing of density peaks
• The Cosmic Ballet II: Spin alignment of galaxies and haloes with large-scale filaments in the EAGLE simulation
• Sparse sampling, galaxy bias, and voids
• The Evidence of Absence: Galaxy Voids in the Excursion Set Formalism
• Photometric Properties of Void Galaxies in the Sloan Digital Sky Survey DR7 Data Release
• The VIMOS Public Extragalactic Redshift Survey: Measuring the growth rate of structure around cosmic voids
• Only the Lonely: H I Imaging of Void Galaxies
• 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
• Detecting Neutrino Mass by Combining Matter Clustering, Halos, and Voids
• The Void Size Function in Dynamical Dark Energy Cosmologies
• Precision cosmology with voids in the final BOSS data
• Voids in the 2dFGRS and LCDM simulations: spatial and dynamical properties
• Alignments of Voids in the Cosmic Web
• The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: geometry and growth from the anisotropic void-galaxy correlation function in the luminous red galaxy sample
• Cosmic voids in modified gravity models with massive neutrinos
• Cosmic web anisotropy is the primary indicator of halo assembly bias
• The GIGANTES dataset: precision cosmology from voids in the machine learning era
• Multipole analysis of redshift-space distortions around cosmic voids
• On the linearity of tracer bias around voids
• A halo bias function measured deeply into voids without stochasticity
• The Santiago-Harvard-Edinburgh-Durham void comparison II: unveiling the Vainshtein screening using weak lensing
• Consistency of the growth rate in different environments with the 6dF Galaxy Survey: measurement of the void-galaxy and galaxy-galaxy correlation functions
• Linear redshift space distortions for cosmic voids based on galaxies in redshift space
• Cosmic voids in coupled dark energy cosmologies: the impact of halo bias
• Using Voids to Unscreen Modified Gravity
• A flexible modelling of galaxy assembly bias
• Cosmological exploitation of the size function of cosmic voids identified in the distribution of biased tracers
• Euclid: Cosmological forecasts from the void size function
• The Void Galaxy Survey: Star Formation Properties
• Cosmic voids in modified gravity scenarios
• Cosmological constraints from the BOSS DR12 void size function
• Caught in the cosmic web: Environmental effect on halo concentrations, shape, and spin
• The dependence of halo bias on age, concentration and spin
• Cluster-Void Degeneracy Breaking: Dark Energy, Planck and the Largest Cluster & Void
• Cosmic web dependence of galaxy clustering and quenching in SDSS
• On the relative bias of void tracers in the Dark Energy Survey
• On the influence of halo mass accretion history on galaxy properties and assembly bias
• Redshift-space effects in voids and their impact on cosmological tests. Part I: the void size function
• The Void Galaxy Survey: Photometry, structure and identity of void galaxies
• The dark matter of galaxy voids
• Clues on void evolution III: Structure and dynamics in void shells
• New constraints on the linear growth rate using cosmic voids in the SDSS DR12 datasets
• Modelling large-scale halo bias using the bispectrum
• Galaxies in voids assemble their stars slowly
• Large-scale modulation of star formation in void walls
• Constraint of Void Bias on Primordial non-Gaussianity
• Redshift-space effects in voids and their impact on cosmological tests. Part II: the void-galaxy cross-correlation function
• Dependence of halo bias on mass and environment
• Cosmic voids detection without density measurements
• Clustering and Bias Measurements of SDSS Voids
• The physical origins of low-mass spin bias
• The sparkling Universe: the coherent motions of cosmic voids
• Stellar mass-metallicity relation throughout the large-scale structure of the Universe: CAVITY mother sample
• The perspective of voids on rising cosmology tensions
• Non-fiducial cosmological test from geometrical and dynamical distortions around voids
• DEMNUni: disentangling dark energy from massive neutrinos with the void size function
• How galaxies populate haloes in very low-density environments? An analysis of the Halo Occupation Distribution in cosmic voids
• The halo bias inside cosmic voids
• The Halo Void (Dust) Model of Large Scale Structure
• The universal multiplicity function: counting halos and voids
• Guess the cheese flavour by the size of its holes: A cosmological test using the abundance of Popcorn voids
• Hierarchical structure of the cosmic web and galaxy properties
• Structure and dynamics in low density regions: galaxy-galaxy correlations inside cosmic voids
• How do galaxies populate halos in extreme density environments? An analysis of the Halo Occupation Distribution in SDSS
• The sparkling Universe: a scenario for cosmic void motions
• The sparkling Universe: Clustering of voids and void clumps
• Separate Universe calibration of the dependence of halo bias on cosmic web anisotropy
• Analytical halo models of cosmic tidal fields
• Imprints of the cosmic void evolution on the baryon processes inside galaxy haloes
• Cosmological surveys with multi-object spectrographs
• New insight into the variability of the Be star $\pi$ Aquarii: Determination of stellar and disk parameters
• Exploring the physical origins of halo assembly bias from early times
• Secondary halo bias through cosmic time II: Reconstructing halo properties using clustering information
• Central galaxy alignments. Dependence on the mass and the large-scale environment
• Spatial correlations of extended cosmological structures
• Individual halo bias in models of $f(R)$ gravity