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arXiv: 2106.12581
handle: 10261/253866 , 2434/865370 , 10281/505439 , 11567/1072906 , 11585/863521
ABSTRACT We measure the galaxy two- and three-point correlation functions at z = [0.5, 0.7] and z = [0.7, 0.9], from the Public Data Release 2 (PDR2) of the VIMOS Public Extragalactic Redshift Survey (VIPERS). We model the two statistics including a non-linear one-loop model for the two-point function and a tree-level model for the three-point function, and perform a joint likelihood analysis. The entire process and non-linear corrections are tested and validated through the use of the 153 highly realistic VIPERS mock catalogues, showing that they are robust down to scales as small as 10 $h^{-1} \, \mathrm{Mpc}$. The mocks are also adopted to compute the covariance matrix that we use for the joint two- and three-point analysis. Despite the limited statistics of the two (volume-limited) subsamples analysed, we demonstrate that such a combination successfully breaks the degeneracy existing at two-point level between clustering amplitude σ8, linear bias b1, and the linear growth rate of fluctuations f. For the latter, in particular, we measure $f(z=0.61)=0.64^{+0.55}_{-0.37}$ and f(z = 0.8) = 1.0 ± 1.0, while the amplitude of clustering is found to be σ8(z = 0.61) = 0.50 ± 0.12 and $\sigma _8(z=0.8)=0.39^{+0.11}_{-0.13}$. These values are in excellent agreement with the extrapolation of a Planck cosmology.
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Large-scale structure of Universe, Galaxies: statistics, Cosmology: observations, FOS: Physical sciences, cosmology: observations; galaxies: statistics; large-scale structure of Universe;, cosmology: observations; galaxies: statistics; large-scale structure of Universe, statistics [Galaxies], cosmology: observations, Large-scale structure of the universe, large-scale structure of Universe, [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], observations [Cosmology], galaxies: statisticslarge-scale structure of Universecosmology: observations, galaxies: statistics, Astrophysics - Cosmology and Nongalactic Astrophysics
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Large-scale structure of Universe, Galaxies: statistics, Cosmology: observations, FOS: Physical sciences, cosmology: observations; galaxies: statistics; large-scale structure of Universe;, cosmology: observations; galaxies: statistics; large-scale structure of Universe, statistics [Galaxies], cosmology: observations, Large-scale structure of the universe, large-scale structure of Universe, [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], observations [Cosmology], galaxies: statisticslarge-scale structure of Universecosmology: observations, galaxies: statistics, Astrophysics - Cosmology and Nongalactic Astrophysics
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