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Exploring cosmic homogeneity with the BOSS DR12 galaxy sample

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1702.02159.pdf (2.223Mb)
Date
09/06/2017
Author
Ntelis, Pierros
Hamilton, Jean-Christophe
Goff, Jean-Marc Le
Burtin, Etienne
Laurent, Pierre
Rich, James
Busca, Nicolas Guillermo
Tinker, Jeremy
Aubourg, Eric
Bourboux, Hélion du Mas des
Bautista, Julian
Delabrouille, Nathalie Palanque
Delubac, Timothée
Eftekharzadeh, Sarah
Hogg, David W.
Myers, Adam
Vargas-Magaña, Mariana
Pâris, Isabelle
Petitjean, Partick
Rossi, Graziano
Schneider, Donald P.
Tojeiro, Rita
Yeche, Christophe
Keywords
Galaxy clustering
Cosmic web
Galaxy surveys
Redshift surveys
QB Astronomy
QC Physics
DAS
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Abstract
In this study, we probe the transition to cosmic homogeneity in the Large Scale Structure (LSS) of the Universe using the CMASS galaxy sample of BOSS spectroscopic survey which covers the largest effective volume to date, 3 h-3 Gpc3 at 0.43 ≤ z ≤ 0.7. We study the scaled counts-in-spheres, N(<r), and the fractal correlation dimension, D2(r), to assess the homogeneity scale of the universe using a Landy & Szalay inspired estimator. Defining the scale of transition to homogeneity as the scale at which D2(r) reaches 3 within 1%, i.e. D2(r)>2.97 for r>RH, we find RH = (63.3±0.7) h-1 Mpc, in agreement at the percentage level with the predictions of the ΛCDM model RH=62.0 h-1 Mpc. Thanks to the large cosmic depth of the survey, we investigate the redshift evolution of the transition to homogeneity scale and find agreement with the ΛCDM prediction. Finally, we find that 2 is compatible with 3 at scales larger than 300 h-1 Mpc in all redshift bins. These results consolidate the Cosmological Principle and represent a precise consistency test of the ΛCDM model.
Citation
Ntelis , P , Hamilton , J-C , Goff , J-M L , Burtin , E , Laurent , P , Rich , J , Busca , N G , Tinker , J , Aubourg , E , Bourboux , H D M D , Bautista , J , Delabrouille , N P , Delubac , T , Eftekharzadeh , S , Hogg , D W , Myers , A , Vargas-Magaña , M , Pâris , I , Petitjean , P , Rossi , G , Schneider , D P , Tojeiro , R & Yeche , C 2017 , ' Exploring cosmic homogeneity with the BOSS DR12 galaxy sample ' , Journal of Cosmology and Astroparticle Physics , vol. 2017 , no. 6 , 019 . https://doi.org/10.1088/1475-7516/2017/06/019
Publication
Journal of Cosmology and Astroparticle Physics
Status
Peer reviewed
DOI
https://doi.org/10.1088/1475-7516/2017/06/019
ISSN
1475-7516
Type
Journal article
Rights
Copyright © 2017, IOP Publishing Ltd and Sissa Medialab srl This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1088/1475-7516/2017/06/019
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URL
https://arxiv.org/abs/1702.02159
URI
http://hdl.handle.net/10023/12370

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