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Real-space density profile reconstruction of stacked voids

Published online by Cambridge University Press:  12 October 2016

Alice Pisani ,
P. Sutter ,
G. Lavaux  and
B. Wandelt
Alice Pisani
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France
P. Sutter
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France Center for Cosmology and AstroParticle Physics, Ohio State University, Columbus, USA
G. Lavaux
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France
B. Wandelt
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR7095, F-75014, Paris, France CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris, France Department of Physics, University of Illinois at Urbana-Champaign, Urbana, USA Department of Astronomy, University of Illinois at Urbana-Champaign, Urbana, USA
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Abstract

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Modern surveys allow us to access to high quality large scale structure measurements. In this framework, cosmic voids appear as a new potential probe of Cosmology. We discuss the use of cosmic voids as standard spheres and their capacity to constrain new physics, dark energy and cosmological models. We introduce the Alcock-Paczyński test and its use with voids. We discuss the main difficulties in treating with cosmic voids: redshift-space distortions, the sparsity of data, and peculiar velocities. We present a method to reconstruct the spherical density profiles of void stacks in real space, without redshift-space distortions. We show its application to a toy model and a dark matter simulation; as well as a first application to reconstruct real cosmic void stacks density profiles in real space from the Sloan Digital Sky Survey.

Keywords

cosmology: large-scale structure of universemethods: dark energyAbel inverse
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 546 - 550
Copyright
Copyright © International Astronomical Union 2016 

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