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- W4308609871 abstract "We present first-order post-Newtonian (1PN) approximations of a general imperfect fluid and of an axion as a coherently oscillating massive scalar field, both in the cosmological context. For the axion, using the Klein transformation and Madelung transformation we derive the Schrodinger and Madelung hydrodynamic formulations, respectively, in exact covariant way and to 1PN order. Complete sets of equations for the 1PN formulations are derived without fixing the temporal gauge condition. We study the linear instability in cosmology and a static limit for both fluid and axion; these are presented independently of the gauge condition to 1PN order, thus are naturally gauge-invariant." @default.
- W4308609871 created "2022-11-13" @default.
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- W4308609871 date "2022-11-03" @default.
- W4308609871 modified "2023-09-27" @default.
- W4308609871 title "Axion cosmology with post-Newtonian corrections" @default.
- W4308609871 doi "https://doi.org/10.48550/arxiv.2211.02197" @default.
- W4308609871 hasPublicationYear "2022" @default.
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