Quantifying the colour-dependent stochasticity of large-scale structure

Citation:

Patej A, Eisenstein D. Quantifying the colour-dependent stochasticity of large-scale structure. Monthly Notices of the Royal Astronomical Society. 2016;460 :1310-1317.

Date Published:

August 1, 2016

Abstract:

We address the question of whether massive red and blue galaxies tracethe same large-scale structure at z ˜ 0.6 using the CMASS sampleof galaxies from Data Release 12 of the Sloan Digital Sky Survey III.After splitting the catalogue into subsamples of red and blue galaxiesusing a simple colour cut, we measure the clustering of both subsamplesand construct the correlation coefficient, r, using two statistics. Thecorrelation coefficient quantifies the stochasticity between the twosubsamples, which we examine over intermediate scales (20 ≲ R≲ 100 h-1 Mpc). We find that on these intermediatescales, the correlation coefficient is consistent with 1; in particular,we find r > 0.95 taking into account both statistics and r > 0.974using the favoured statistic.

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