We present a new analysis of the inferred growth rate of cosmic structure measured around voids, using the LOWZ and the CMASS samples in the twelfth data release (DR12) of SDSS. Using a simple multipole analysis we recover a value consistent with ΛCDM for the inferred linear growth rate normalized by the linear bias: the β parameter. This is true in both the mock catalogues and the data, where we find β=0.33±0.06 for the LOWZ sample and β=0.36±0.05 for the CMASS sample. This work demonstrates that we can expect redshift-space distortions around voids to provide unbiased and accurate constraints on the growth rate, complementary to galaxy clustering, using simple linear modelling.
@article{arxiv.1903.05645,
title = {New constraints on the linear growth rate using cosmic voids in the SDSS DR12 datasets},
author = {Ixandra Achitouv},
journal= {arXiv preprint arXiv:1903.05645},
year = {2019}
}