Pairwise velocities in the 'Running FLRW' cosmological model
2017
Online
unknown
Zugriff:
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.
Comment: 10 pages, 4 figures. arXiv admin note: text overlap with arXiv:1605.00714
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Pairwise velocities in the 'Running FLRW' cosmological model
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Autor/in / Beteiligte Person: | Bibiano, Antonio ; Croton, Darren J. |
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Veröffentlichung: | 2017 |
Medientyp: | unknown |
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