DEMNUni: disentangling dark energy from massive neutrinos with the void size function

Abstract

Cosmic voids, the underdense regions in the Universe, are impacted by dark energy and massive neutrinos. In this work, relying on the DEMNUni suite of cosmological simulations, we explore the void size function in cosmologies with both dynamical dark energy and massive neutrinos. We investigate the impact of different choices of dark matter tracers on the void size function and study its sensitivity to the joint effect of modifying the dark energy equation of state and the sum of neutrino masses. We show that dark energy and massive neutrinos produce separable effects on the void size function. This statistic therefore allows us to distinguish among a wide range of combinations of dark energy equations of state and total neutrino masses, and its exploitation in forthcoming large galaxy surveys will be extremely useful in breaking degeneracies among these cosmological parameters.

29 pages, 15 figures, 2 tables, 1 appendix. Accepted for publication in JCAP

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Cited by in corpus (13)

• A Parameter-Masked Mock Data Challenge for Beyond-Two-Point Galaxy Clustering Statistics
• Why Cosmic Voids Matter: Nonlinear Structure & Linear Dynamics
• DEMNUni: The imprint of massive neutrinos on the cross-correlation between cosmic voids and CMB lensing
• The universal multiplicity function: counting halos and voids
• Modelling the next-to-leading order matter three-point correlation function using FFTLog
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• Significance of void shape: Neutrino mass from Voronoi void halos?
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