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- W2506673053 abstract "We investigate how the properties of dark energy affect the cosmological measurements of neutrino mass and extra relativistic degrees of freedom. We limit ourselves to the most basic extensions of Λ cold dark matter (CDM) model, i.e. the wCDM model with one additional parameter w, and the w0waCDM model with two additional parameters, w0 and wa. In the cosmological fits, we employ the 2015 cosmic microwave background temperature and polarization data from the Planck mission, in combination with low-redshift measurements such as the baryon acoustic oscillations, Type Ia supernovae and the Hubble constant (H0). Given effects of massive neutrinos on large-scale structure, we further include weak lensing, redshift space distortion, Sunyaev–Zeldovich cluster counts and Planck lensing data. We show that, though the cosmological constant Λ is still consistent with the current data, a phantom dark energy (w < −1) or an early phantom dark energy (i.e. quintom evolving from w < −1 to w > −1) is slightly more favoured by current observations, which leads to the fact that in both wCDM and w0waCDM models we obtain a larger upper limit of ∑mν. We also show that in the three dark energy models, the constraints on Neff are in good accordance with each other, all in favour of the standard value 3.046, which indicates that the dark energy parameters almost have no impact on constraining Neff. Therefore, we conclude that the dark energy parameters can exert a significant influence on the cosmological weighing of neutrinos, but almost cannot affect the constraint on dark radiation." @default.
- W2506673053 created "2016-08-23" @default.
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- W2506673053 date "2017-04-25" @default.
- W2506673053 modified "2023-10-15" @default.
- W2506673053 title "Constraining neutrino mass and extra relativistic degrees of freedom in dynamical dark energy models using Planck 2015 data in combination with low-redshift cosmological probes: basic extensions to ΛCDM cosmology" @default.
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- W2506673053 doi "https://doi.org/10.1093/mnras/stx978" @default.
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