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- W175039145 abstract "We review the parametrized post-Friedmann (PPF) method within the framework of interacting dark energy model for a FRW background. We assess the possibility of using such treatment for curing a “bad” interaction from its large-scale instabilities, usually presented within the standard linear perturbation theory. Regarding the Markov Chain Monte-Carlo analysis, our global fitting combines several cosmological probes including the cosmic microwave background (WMAP9+Planck) data, barion acoustic oscillation (BAO) measurements, JLA sample of supernovae, Hubble constant (HST), and redshift-space distorsion (RSD) measurements through the fσ8(z) data points. The joint observational analysis of Planck + WP + JLA + BAO + HST + RSD data leads to a coupling parameter, ξc = 0.00140 +0.00079 −0.00080 at 1σ level for vanishing momentum transfer potential, whereas the aforesaid value is reduced in a 0.022% when the momentum transfer potential is switched on. The CMB power spectrum shows up a correlation between the coupling parameter ξc and the position of acoustic peaks or their amplitudes. The first peak’s height increases when ξc takes larger values and its position is shifted. We obtain that the relative difference, in the CMB power spectrum, between the vanilla model and our best-fit cosmology remains below 0.2% in module." @default.
- W175039145 created "2016-06-24" @default.
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- W175039145 date "2014-07-16" @default.
- W175039145 modified "2023-09-27" @default.
- W175039145 title "Curing dark energy instability with parametrized post-Friedmann treatment" @default.
- W175039145 hasPublicationYear "2014" @default.
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