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

Katsuki Aoki, Keiichi Maeda

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    22 Citations (Scopus)

    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.

    Original languageEnglish
    Article number124089
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume90
    Issue number12
    DOIs
    Publication statusPublished - 2014 Dec 30

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    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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