In dark matter-dark energy coupling models, the Kaiser formula gains a coupling-dependent term, so redshift-space distortions measure an effective growth rate that differs from the true matter growth rate, with Euclid and SKA2 forecasts.
(106) As in conformal model I, the modification to the Hubble friction term is related to the effective CDM equation of state byE1 = 3weff c /2
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Redshift space distortions in the presence of non-minimally coupled dark matter
In dark matter-dark energy coupling models, the Kaiser formula gains a coupling-dependent term, so redshift-space distortions measure an effective growth rate that differs from the true matter growth rate, with Euclid and SKA2 forecasts.