Axion cosmology with post-Newtonian corrections
نویسندگان
چکیده
We present first-order post-Newtonian (1PN) approximations of a general imperfect fluid and an axion as coherently oscillating massive scalar field, both in the cosmological context. For axion, using Klein transformation Madelung we derive Schr\"odinger hydrodynamic formulations, respectively, exact covariant way to 1PN order. Complete sets equations for formulations are derived without fixing temporal gauge condition. study linear instability cosmology static limit axion; these presented independently condition order, thus naturally gauge-invariant.
منابع مشابه
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ژورنال
عنوان ژورنال: Physical review
سال: 2023
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.107.083508