http://arxiv.org/abs/2011.14697
We investigate cosmological signatures of the minimal theory of massive gravity (MTMG). For this aim, we simulate the normal branch of the MTMG by employing the RAMSES $N$-body code and extending it with an effective gravitational constant $G_{eff}$. We implement an environment-dependent $G_{eff}$ as a function of the graviton mass and the local energy density, as predicted by MTMG. We find that halo density profiles are not a good probe for MTMG since deviations from General Relativity are quite small. Similarly, the matter power spectra show deviations only at percentage level. However, we find a clear difference between MTMG and GR in that voids are denser in MTMG than in GR. Since measuring voids profiles is quite a complex task from the observational point of view, a better probe of MTMG would be the halo abundances. In this case, MTMG creates a larger amount of massive halos, while there is a suppression on the abundance of small halos.
R. Hagala, A. Felice, D. Mota, et. al.
Tue, 1 Dec 20
8/108
Comments: 8 pages, 7 figures
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