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Precision Cosmology with Cosmic Voids


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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Dates and versions

in2p3-01336431 , version 1 (23-06-2016)


  • HAL Id : in2p3-01336431 , version 1


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