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• W4315703090 abstract "Horava gravity has been proposed as a renormalizable, higher-derivative, Lorentz-violating quantum gravity model without ghost problems. A Horava gravity based dark energy (HDE) model for dynamical dark energy has been also proposed earlier by identifying all the extra (gravitational) contributions from the Lorentz-violating terms as an effective energy-momentum tensor in Einstein equation. We consider a complete CMB, BAO, and SNe Ia data test of the HDE model by considering general perturbations over the background perfect HDE fluid. Except from BAO, we obtain the preference of non-flat universes for all other data-set combinations. We obtain a positive result on the cosmic tensions between the Hubble constant H0 and the cosmic shear S8, because we have a shift of H0 towards a higher value, though not enough for resolving the H0 tension, but the value of S8 is unaltered. This is in contrast to a rather decreasing H0 but increasing S8 in a non-flat LCDM. For all other parameters, like Omega_m and Omega_Lambda, we obtain quite comparable results with those of LCDM for all data sets, especially with BAO, so that our results are close to a cosmic concordance between the datasets, contrary to the standard non-flat LCDM. We also obtain some undesirable features, like an almost null result on Omegak, which gives back the flat LCDM, if we do not predetermine the sign of Omegak, but we propose several promising ways for improvements by generalizing our analysis." @default.
• W4315703090 created "2023-01-12" @default.
• W4315703090 creator A5035621861 @default.
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• W4315703090 date "2023-01-03" @default.
• W4315703090 modified "2023-10-13" @default.
• W4315703090 title "A new test of dynamical dark energy models and cosmic tensions in Hořava gravity" @default.
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• W4315703090 doi "https://doi.org/10.1093/mnras/stac3824" @default.
• W4315703090 hasPublicationYear "2023" @default.
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