Precision Cosmology with Cosmic Voids

Abstract : Modern surveys allow us to access to high quality measurements, by sampling the galaxy distribution in detail also in the emptier regions, voids. Cosmic voids present themselves as a new tool to constrain cosmology. In this talk, I first briefly introduce the use of voids for cosmology. I also discuss the systematic effects affecting void analysis in the framework of current and future surveys. Then, I present the most recent cosmological constraints obtained from voids and in particular I examine the use of the Alcock-Paczynski effect to extract such constraints.Finally, I present a forecast for void abundances with the future Euclid and WFIRST missions and obtain, using the Fisher matrix formalism, a prediction for the constraints that void abundances from those surveys will set on cosmological parameters.
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http://hal.in2p3.fr/in2p3-01336431
Contributor : Danielle Cristofol <>
Submitted on : Thursday, June 23, 2016 - 10:14:38 AM
Last modification on : Thursday, January 18, 2018 - 1:55:08 AM

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  • HAL Id : in2p3-01336431, version 1

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A. Pisani. Precision Cosmology with Cosmic Voids. Statistical Challenges in 21st Century Cosmology (COSMO21), May 2016, Chania, Greece. ⟨in2p3-01336431⟩

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