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Exploring cosmic homogeneity with the BOSS DR12 galaxy sample

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) Gpc(3) at 0.43 ≤ z ≤ 0.7. We study the scaled counts-in-spheres, N(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 Script 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 ΛCDM model.
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Submitted on : Thursday, November 23, 2017 - 1:24:12 AM
Last modification on : Wednesday, April 7, 2021 - 3:49:46 AM

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Pierros Ntelis, Jean-Christophe Hamilton, Jean-Marc Le Goff, Etienne Burtin, Pierre Laurent, et al.. Exploring cosmic homogeneity with the BOSS DR12 galaxy sample. JCAP, 2017, 06, pp.019. ⟨10.1088/1475-7516/2017/06/019⟩. ⟨hal-01645206⟩



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