2017/09/30 by Yuting Wang, Gong-Bo Zhao, Chia-Hsun Chuang +4 · 1 citation
Physics and Astronomy · #astro-ph.CO
paper · pdf · doi:10.1093/mnras/sty2449
8 pages, 8 figures, 2 tables, accepted for publication MNRAS. The measured results including the full covariance matrices are made available at https://github.com/ytcosmo/TomoBAORSD and tomographic clustering data used in this work is available at https://sdss3.org//science/boss_publications.php
arxiv created 2018/09/03 · arxiv updated 2018/09/19
We perform a tomographic analysis of structure growth and expansion rate from the anisotropic galaxy clustering of the combined sample of Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12, which covers the redshift range of 0.2<z<0.75. In order to extract the redshift information of anisotropic galaxy clustering, we analyse this data set in nine overlapping redshift slices in configuration space and perform the joint constraints on the parameters (DV, FAP, fσ8) using the correlation function multipoles. The analysis pipeline is validated using the MultiDark-Patchy mock catalogues. We obtain a measurement precision of 1.5%-2.9% for DV, 5.2%-9% for FAP and 13.3%-24% for f σ8, depending on the effective redshift of the slices. We report a joint measurement of (DV, FAP, fσ8) with the full covariance matrix in nine redshift slices. We use our joint BAO and RSD measurement combined with external datasets to constrain the gravitational growth index γ, and find γ=0.656 ± 0.057, which is consistent with the ΛCDM prediction within 95% CL.