Cosmic voids: a novel probe to shed light on our Universe

Abstract

Cosmic voids, the less dense patches of the Universe, are promising laboratories to extract cosmological information. Thanks to their unique low density character, voids are extremely sensitive to diffuse components such as neutrinos and dark energy, and represent ideal environments to study modifications of gravity, where the effects of such modifications are expected to be more prominent. Robust void-related observables, including for example redshift-space distortions (RSD) and weak lensing around voids, are a promising way to chase and test new physics. Cosmological analysis of the large-scale structure of the Universe predominantly relies on the high density regions. Current and upcoming surveys are designed to optimize the extraction of cosmological information from these zones, but leave voids under-exploited. A dense, large area spectroscopic survey with imaging capabilities is ideal to exploit the power of voids fully. Besides helping illuminate the nature of dark energy, modified gravity, and neutrinos, this survey will give access to a detailed map of under-dense regions, providing an unprecedented opportunity to observe and study a so far under-explored galaxy population.

Science White Paper for the Astro2020 Decadal Survey, 5 pages text, 14 pages with references and affiliations

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Cited by in corpus (19)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Towards an Optimal Estimation of Cosmological Parameters with the Wavelet Scattering Transform
• Dark Energy Survey Year 3 results: curved-sky weak lensing mass map reconstruction
• The GIGANTES dataset: precision cosmology from voids in the machine learning era
• Properties of simulated galaxies and supermassive black holes in cosmic voids
• Cosmological constraints from the BOSS DR12 void size function
• What does the Marked Power Spectrum Measure? Insights from Perturbation Theory
• Why Cosmic Voids Matter: Nonlinear Structure & Linear Dynamics
• DEMNUni: disentangling dark energy from massive neutrinos with the void size function
• Dark Energy Survey Year 3 results: imprints of cosmic voids and superclusters in the Planck CMB lensing map
• Cosmology with Persistent Homology: a Fisher Forecast
• Towards unveiling the large-scale nature of gravity with the wavelet scattering transform
• Cosmology from one galaxy in a void?
• Hitting the mark: Optimising Marked Power Spectra for Cosmology
• Intrinsic alignments of galaxies around cosmic voids
• Proca-stinated Cosmology II: Matter, Halo, and Lensing Statistics in the vector Galileon
• Cosmology with Persistent Homology: Parameter Inference via Machine Learning
• Detecting Modeling Bias with Continuous Time Flow Models on Weak Lensing Maps
• Thin-shell wormholes in cosmic voids