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

Pisani, Alice and Doré, Olivier and Wang, Yun (2019) Cosmic voids: a novel probe to shed light on our Universe. Astro2020 Science White Paper, . (Unpublished)

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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.

Item Type:Report or Paper (White Paper)
Related URLs:
URLURL TypeDescription Paper
Doré, Olivier0000-0002-5009-7563
Group:Infrared Processing and Analysis Center (IPAC)
Series Name:Astro2020 Science White Paper
Record Number:CaltechAUTHORS:20190930-153418475
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98972
Deposited By: Tony Diaz
Deposited On:30 Sep 2019 22:43
Last Modified:03 Oct 2019 21:46

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