Anti-lensing: the bright side of voids

Abstract

More than half of the volume of our Universe is occupied by cosmic voids. The lensing magnification effect from those under-dense regions is generally thought to give a small dimming contribution: objects on the far side of a void are supposed to be observed as slightly smaller than if the void were not there, which together with conservation of surface brightness implies net reduction in photons received. This is predicted by the usual weak lensing integral of the density contrast along the line of sight. We show that this standard effect is swamped at low redshifts by a relativistic Doppler term that is typically neglected. Contrary to the usual expectation, objects on the far side of a void are brighter than they would be otherwise. Thus the local dynamics of matter in and near the void is crucial and is only captured by the full relativistic lensing convergence. There are also significant nonlinear corrections to the relativistic linear theory, which we show actually under-predicts the effect. We use exact solutions to estimate that these can be more than 20% for deep voids. This remains an important source of systematic errors for weak lensing density reconstruction in galaxy surveys and for supernovae observations, and may be the cause of the reported extra scatter of field supernovae located on the edge of voids compared to those in clusters.

5 pages, 3 figures

References in corpus (14)

• The linear power spectrum of observed source number counts
• The Dependence of Type Ia Supernova Luminosities on their Host Galaxies
• New Perspective on Galaxy Clustering as a Cosmological Probe: General Relativistic Effects
• Large-scale clustering of galaxies in general relativity
• Fluctuations of the luminosity distance
• A public void catalog from the SDSS DR7 Galaxy Redshift Surveys based on the watershed transform
• (Mis-)Interpreting supernovae observations in a lumpy universe
• Cosmic Rulers
• Effect of Peculiar Motion in Weak Lensing
• Structure formation in the quasispherical Szekeres model
• Evolution of cosmic structures in different environments in the quasispherical Szekeres model
• Ricci focusing, shearing, and the expansion rate in an almost homogeneous Universe
• Redshift and distances in a ΛCDM cosmology with non-linear inhomogeneities
• Exact nonlinear inhomogeneities in $\Lambda$CDM cosmology

Cited by in corpus (71)

• Universal Density Profile for Cosmic Voids
• Cosmology with Void-Galaxy Correlations
• Interpretation of the Hubble diagram in a nonhomogeneous universe
• Two families of astrophysical diverging lens models
• Average and dispersion of the luminosity-redshift relation in the concordance model
• Isolating relativistic effects in large-scale structure
• Can a supervoid explain the Cold Spot?
• Cosmology with Doppler Lensing
• Nonlinear relativistic corrections to cosmological distances, redshift and gravitational lensing magnification. I - Key results
• Cosmic voids in modified gravity scenarios
• Nonlinear relativistic corrections to cosmological distances, redshift and gravitational lensing magnification. II - Derivation
• Can all cosmological observations be accurately interpreted with a unique geometry?
• The Effect of Weak Lensing on Distance Estimates from Supernovae
• Differential cosmic expansion and the Hubble flow anisotropy
• Exploring the hidden Universe: A novel phenomenological approach for recovering arbitrary gravitational-wave millilensing configurations
• Swiss-cheese models and the Dyer-Roeder approximation
• Dipolar modulation in the size of galaxies: The effect of Doppler magnification
• Detecting the relativistic galaxy bispectrum
• Study of null and time-like geodesics in the exterior of a Schwarzschild black hole with quintessence and cloud of strings
• Light propagation in Swiss cheese models of random close-packed Szekeres structures: Effects of anisotropy and comparisons with perturbative results
• Light propagation in inhomogeneous and anisotropic cosmologies
• Void profile from Planck lensing potential map
• On the perturbation of the luminosity distance by peculiar motions
• Studying the precision of ray tracing techniques with Szekeres models
• Ray tracing and Hubble diagrams in post-Newtonian cosmology
• Effect of inhomogeneities on high precision measurements of cosmological distances
• Non-linear relativistic contributions to the cosmological weak-lensing convergence
• Turning noise into signal: learning from the scatter in the Hubble diagram
• The theory of stochastic cosmological lensing
• General Relativistic Corrections to the Weak Lensing Convergence Power Spectrum
• Weak lensing of large scale structure in the presence of screening
• Lensing in the Geodesic Light-Cone coordinates and its (exact) illustration to an off-center observer in Lemaître-Tolman-Bondi models
• Observational Signatures: Shadow cast by the effective metric of photons for black holes with rational non-linear electrodynamics
• Accelerating expansion or inhomogeneity? A comparison of the $\Lambda$CDM and Lema\^ıtre - Tolman models
• The effects of structure anisotropy on lensing observables in an exact general relativistic setting for precision cosmology
• The cosmological bulk flow in QCDM model: (In)consistency with $\Lambda CDM$
• The Local Value of $H_0$ in an Inhomogeneous Universe
• Classical tests on a charged Weyl black hole: bending of light, Shapiro delay and Sagnac effect
• Theoretical and numerical perspectives on cosmic distance averages
• A null test to probe the scale-dependence of the growth of structure as a test of General Relativity
• CMB seen through random Swiss Cheese
• Observing relativistic features in large-scale structure surveys -- II: Doppler magnification in an ensemble of relativistic simulations
• Observational signatures of a static $f(R)$ black hole with thin accretion disk
• Do intergalactic magnetic fields imply an open universe?
• Gravitational Lensing by a structure in a cosmological background
• Directional dependence of the local estimation of $H_0$ and the non perturbative effects of primordial curvature perturbations
• Observational constraints from SNe Ia and Gamma-Ray Bursts on a clumpy universe
• Black hole in a generalized Chaplygin-Jacobi dark fluid: shadow and light deflection angle
• $H_0$ tension or $M$ overestimation?
• Non perturbative effects of primordial curvature perturbations on the apparent value of a cosmological constant
• Lightcone Averaging and Precision Cosmology
• Imprints of decaying dark matter on cosmic voids
• One-point statistics of the Lagrangian displacement field
• Can we discern millilensed gravitational-wave signals from signals produced by precessing binary black holes with ground-based detectors?
• The density distributions of cosmic structures: impact of the local environment on weak-lensing convergence
• Primordial non-Gaussianity -- the effects of relativistic and wide-angle corrections to the power spectrum
• General Relativistic Effects in Weak Lensing Angular Power Spectra
• Weak-lensing tunnel voids in simulated light cones: A new pipeline to investigate modified gravity and massive neutrinos signatures
• A Simple Gravitational Lens Model For Cosmic Voids
• Testing inhomogeneous cosmography in our cosmic neighborhood using CosmicFlows-4
• The art of building a smooth cosmic distance ladder in a perturbed universe
• Accurately computing weak lensing convergence
• A probabilistic framework for cosmological inference of peculiar velocities
• Post-Newtonian Gravity in Cosmology
• Deep learning reconstruction of the large scale structure of the Universe from luminosity distance observations
• Emergence of smooth distance and apparent magnitude in a lumpy Universe
• Constraining decaying dark matter models with gravitational lensing and cosmic voids
• Probing the parameters of a Schwarzschild black hole surrounded by quintessence and cloud of strings through four standard astrophysical tests
• Mapping the cosmic mass distribution with stacked weak gravitational lensing and Doppler lensing
• Ringing the universe with cosmic emptiness: void properties through a combined analysis of stacked weak gravitational and Doppler lensing
• Tracing Cosmological Signature with Doppler Lensing: Insights from Cosmological Simulations