Exploring cosmic homogeneity with the BOSS DR12 galaxy sample

Autor: Ntelis, Pierros, Hamilton, Jean-Christophe, Goff, Jean-Marc Le, Busca, Nicolas Guillermo, Aubourg, Eric, Laurent, Pierre, Rich, James, Burtin, Etienne, Bourboux, Hélion du Mas des, Delabrouille, Nathalie Palanque, Yeche, Christophe, Hogg, David W., Myers, Adam, Tinker, Jeremy, Bautista, Julian, Delubac, Timothée, Rossi, Graziano, Toheiro, Donald P. Schneider Rita, Vargas-Magaña, Mariana
Rok vydání: 2017
Předmět:
Druh dokumentu: Working Paper
DOI: 10.1088/1475-7516/2017/06/019
Popis: 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, $3\ h^{-3}\ \mathrm{Gpc}^3$ at $0.43 \leq z \leq 0.7$. We study the scaled counts-in-spheres, $\mathcal{N}(2.97$ for $r>\mathcal{R}_H$, we find $\mathcal{R}_H = (63.3\pm0.7) \ h^{-1}\ \mathrm{Mpc}$, in agreement at the percentage level with the predictions of the $\Lambda$CDM model $\mathcal{R}_H=62.0\ h^{-1}\ \mathrm{Mpc}$. 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 $\Lambda$CDM prediction. Finally, we find that $\mathcal{D}_2$ 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 $\Lambda CDM$ model.
Comment: Accepted to JCAP, 27 pages
Databáze: arXiv
Externí odkaz: