Gauge-invariant cosmological perturbations in generalized Einstein theories

T. Hirai, Keiichi Maeda

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    Using the covariant approach and conformal transformations, we present a gauge-invariant formalism for cosmological perturbations in generalized Einstein theories (GETs), including the Brans-Dicke theory, theories with a non-minimally coupled scalar field and certain curvature-squared theories. We find an enhancement in the growth rate of density perturbations in the Brans-Dicke theory and discuss attractive features of GETs in the structure formation process.

    Original languageEnglish
    Pages (from-to)6-19
    Number of pages14
    JournalAstrophysical Journal
    Volume431
    Issue number1
    Publication statusPublished - 1994 Aug 10

    Fingerprint

    gauge
    perturbation
    conformal mapping
    curvature
    scalars
    formalism
    augmentation

    Keywords

    • Cosmology: theory
    • Galaxies: formation
    • Large-scale structure of universe
    • Relativity

    ASJC Scopus subject areas

    • Space and Planetary Science

    Cite this

    Gauge-invariant cosmological perturbations in generalized Einstein theories. / Hirai, T.; Maeda, Keiichi.

    In: Astrophysical Journal, Vol. 431, No. 1, 10.08.1994, p. 6-19.

    Research output: Contribution to journalArticle

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