Impact of intrinsic alignments on clustering constraints of the growth rate

ABSTRACT Intrinsic alignments between galaxies and the large-scale structure contaminate galaxy clustering analyses impact constraints on bias growth rate of in Universe. This is result inducing a selection effect spectroscopic samples which correlated with structure. In this work, we quantify biases when are neglected. We also examine different options for mitigation by considering external priors probe combinations. find that conservative restrict to kmax = 0.1 Mpc?1 not significantly affected. However, aim go higher wave numbers could evidence significant contamination from alignments. those cases, including prior alignment amplitude, or combining position-intrinsic shape correlation galaxies, can recover same expected constraining power, even inform measurements.