http://arxiv.org/abs/1903.00154
Modified gravity and massive neutrino cosmologies are two of the most interesting scenarios that have been recently explored to account for possible observational deviations from the concordance $\Lambda$-cold dark matter ($\Lambda$CDM) model. In this context, we investigated the large-scale structure of the Universe by exploiting the \dustp simulations that implement, simultaneously, the effects of $f(R)$ gravity and massive neutrinos. To study the possibility of breaking the degeneracy between these two effects, we analysed the redshift-space distortions in the clustering of dark matter haloes at different redshifts. Specifically, we focused on the monopole and quadrupole of the two-point correlation function, both in real and redshift space. The deviations with respect to $\Lambda$CDM model have been quantified in terms of the linear growth rate parameter. We found that redshift-space distortions provide a powerful probe to discriminate between $\Lambda$CDM and modified gravity models, especially at high redshift ($z \gtrsim 1$), even in the presence of massive neutrinos.
J. García-Farieta, F. Marulli, A. Veropalumbo, et. al.
Mon, 4 Mar 19
30/48
Comments: 15 pages, 11 figures, submitted to MNRAS
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