The BOSS-WiggleZ overlap region - II. Dependence of cosmic growth on galaxy type

摘要: The anisotropic galaxy two-point correlation function (2PCF) allows measurement of the growth large-scale structures from effect peculiar velocities on clustering pattern. We present new measurements auto- and cross-correlation multipoles 69 180 WiggleZ 46 380 Baryon Oscillation Spectroscopic Survey CMASS galaxies sharing an overlapping volume of ∼0.2 (h^−1 Gpc)^3. Analysing redshift-space distortions (RSD) statistics for these two tracers, we test systematic errors in modelling depending type investigate potential improvements cosmological constraints. build a large number mock catalogues to examine limits different RSD models terms fitting scales type, study covariance when performing joint fits. For data, monopole quadrupole 2PCF 24 < s < 80 h^−1Mpc produces normalized rate fσ_8(z = 0.54) = 0.409 ± 0.055, whereas found consistent constraint fσ_8(z = 0.54) = 0.466 ± 0.069, When combining measurements, accounting between surveys, obtain fσ_8(z = 0.54) = 0.413 ± 0.048, agreement with Λ Cold Dark Matter structure other survey measurements.