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Disforming scalar-tensor cosmology

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arxiv 2401.00091 v2 pith:HOTI2WPB submitted 2023-12-29 gr-qc

classification gr-qc
keywords scalarscalar-tensorbianchidiscusseddisformalfieldgravitysolutions
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abstract

Disformal transformations of Friedmann-Lema\^itre-Robertson-Walker and Bianchi geometries are analyzed in the context of scalar-tensor gravity. Novel aspects discussed explicitly are the $3+1$ splitting, the effective fluid equivalent of the gravitational scalar, Bianchi models, stealth solutions, and de Sitter solutions with non-constant scalar field (which are signatures of scalar-tensor gravity). Both pure disformal transformations and more general ones are discussed, including those containing higher derivatives of the scalar field recently introduced in the literature.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Black Holes in the Red-sequence Elliptical Galaxies at Redshifts $\sim 0.7-2.5$: Not Dark Energy Source but Remanants of Little Red Dots

    astro-ph.CO 2025-06 conditional novelty 6.0 of 10

    At redshifts 2 to 7, black holes in massive elliptical hosts show no sign of the cosmological growth needed to make black holes the dark energy, with k=0.13 +/- 0.27 instead of k=3.

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