Relativistic stars in bigravity theory

Katsuki Aoki, Keiichi Maeda, Makoto Tanabe

    研究成果: Article

    6 引用 (Scopus)

    抄録

    Assuming static and spherically symmetric spacetimes in the ghost-free bigravity theory, we find a relativistic star solution, which is very close to that in general relativity. The coupling constants are classified into two classes: Class [I] and Class [II]. Although the Vainshtein screening mechanism is found in the weak gravitational field for both classes, we find that there is no regular solution beyond the critical value of the compactness in Class [I]. This implies that the maximum mass of a neutron star in Class [I] becomes much smaller than that in general relativity (GR). On the other hand, for the solution in Class [II], the Vainshtein screening mechanism works well even in a relativistic star and the result in GR is recovered.

    元の言語English
    記事番号064054
    ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
    93
    発行部数6
    DOI
    出版物ステータスPublished - 2016 3 22

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    stars
    relativity
    screening
    void ratio
    ghosts
    gravitational fields
    neutron stars

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    これを引用

    Relativistic stars in bigravity theory. / Aoki, Katsuki; Maeda, Keiichi; Tanabe, Makoto.

    :: Physical Review D - Particles, Fields, Gravitation and Cosmology, 巻 93, 番号 6, 064054, 22.03.2016.

    研究成果: Article

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