Issue |
A&A
Volume 653, September 2021
|
|
---|---|---|
Article Number | A148 | |
Number of page(s) | 7 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361/202040018 | |
Published online | 24 September 2021 |
Non-linear dynamics of the minimal theory of massive gravity
1
Institute of Theoretical Astrophysics, University of Oslo, PO Box 1029, Blindern, 0315 Oslo, Norway
e-mail: robert.hagala@astro.uio.no
2
Expert Analytics AS, Tordenskiolds gate 6, 0160 Oslo, Norway
3
Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, 606-8502 Kyoto, Japan
4
Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo, 277-8583 Chiba, Japan
Received:
30
November
2020
Accepted:
3
March
2021
We investigate cosmological signatures of the minimal theory of massive gravity (MTMG). To this aim, we simulate the normal branch of the MTMG by employing the RAMSESN-body code and extending it with an effective gravitational constant Geff. We implement an environment-dependent Geff 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 because deviations from general relativity (GR) are quite small. Similarly, the matter power spectra show deviations only at the percentage level. However, we find a clear difference between MTMG and GR in that voids are denser in MTMG than in GR. As measuring void profiles is quite a complex task from an 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 in the abundance of small halos.
Key words: gravitation / cosmology: theory / dark energy / methods: numerical
© ESO 2021
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