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- W2578142005 abstract "We present an analysis of the pairwise velocity statistics from a suite of cosmological N-body simulations describing the Running Friedmann-Lema^itre-Robertson-Walker (R-FLRW) cosmological model. This model is based on quantum field theory in a curved space-time and extends {Lambda}CDM with a time-evolving vacuum energy density. To enforce local conservation of matter a time-evolving gravitational coupling is also included. Our results constitute the first study of velocities in the R-FLRW cosmology, and we also compare with other dark energy simulations suites, repeating the same analysis. We find a strong degeneracy between the pairwise velocity and {sigma}_8 at z=0 for almost all scenarios considered, which remains even when we look back to epochs as early as z=2. We also investigate various Coupled Dark Energy models, some of which show minimal degeneracy, and reveal interesting deviations from {Lambda}CDM which could be readily exploited by future cosmological observations to test and further constrain our understanding of dark energy." @default.
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- W2578142005 date "2017-01-13" @default.
- W2578142005 modified "2023-10-18" @default.
- W2578142005 title "Pairwise velocities in the “Running FLRW” cosmological model" @default.
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- W2578142005 doi "https://doi.org/10.1093/mnras/stx070" @default.
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