Dark matter in ghost-free bigravity theory: From a galaxy scale to the universe

2014/09/07 by Katsuki Aoki, Kei-ichi Maeda · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark fluid #Dark matter #Galaxy #Gravitation #Graviton #Hot dark matter #Physics #Quantum mechanics #Scalar field dark matter #Universe #astro-ph.CO #gr-qc #hep-th

paper · pdf · doi:10.1103/physrevd.90.124089

published as Phys. Rev. D 90, 124089 (2014) · 15 pages, 7 figures, minor changes, references added

arxiv created 2014/09/07 · openalex publication_date 2014/12/30 · arxiv updated 2015/01/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the origin of dark matter based on the ghost-free bigravity theory with twin matter fluids. The present cosmic acceleration can be explained by the existence of graviton mass, while dark matter is required in several cosmological situations (the galactic missing mass, the cosmic structure formation and the cosmic microwave background observation). Assuming that the Compton wavelength of the massive graviton is shorter than a galactic scale, we show the bigravity theory can explain dark matter by twin matter fluid as well as the cosmic acceleration by tuning appropriate coupling constants.

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• Coupling between Galileon and massive gravity with composite metrics