TY - JOUR
T1 - Exploring cosmic homogeneity with the BOSS DR12 galaxy sample
AU - Ntelis, Pierros
AU - Hamilton, Jean Christophe
AU - Le Goff, Jean Marc
AU - Burtin, Etienne
AU - Laurent, Pierre
AU - Rich, James
AU - Busca, Nicolas Guillermo
AU - Tinker, Jeremy
AU - Aubourg, Eric
AU - Du Mas Des Bourboux, Hélion
AU - Bautista, Julian
AU - Delabrouille, Nathalie Palanque
AU - Delubac, Timothée
AU - Eftekharzadeh, Sarah
AU - Hogg, David W.
AU - Myers, Adam
AU - Vargas-Magaña, Mariana
AU - Pâris, Isabelle
AU - Petitjean, Partick
AU - Rossi, Graziano
AU - Schneider, Donald P.
AU - Tojeiro, Rita
AU - Yeche, Christophe
N1 - Publisher Copyright:
© 2017 IOP Publishing Ltd and Sissa Medialab srl .
PY - 2017/6/9
Y1 - 2017/6/9
N2 - 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(2(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.
AB - 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(2(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.
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U2 - 10.1088/1475-7516/2017/06/019
DO - 10.1088/1475-7516/2017/06/019
M3 - Article
AN - SCOPUS:85021624625
SN - 1475-7516
VL - 2017
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 6
M1 - 019
ER -