Impacts of dark energy on constraining neutrino mass after Planck 2018 |
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| Authors: | Ming Zhang Jing-Fei Zhang Xin Zhang |
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| Affiliation: | 1.Department of Physics, College of Sciences, Northeastern University, Shenyang 110819, China;2.Key Laboratory of Data Analytics and Optimization for Smart Industry (Northeastern University), Ministry of Education, Shenyang 110819, China;3.Center for Gravitation and Cosmology, Yangzhou University, Yangzhou 225009, China |
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| Abstract: | Considering the mass splittings of three active neutrinos, we investigate how the properties of dark energy affect the cosmological constraints on the total neutrino mass $sum {m}_{nu }$ using the latest cosmological observations. In this paper, several typical dark energy models, including ΛCDM, wCDM, CPL, and HDE models, are discussed. In the analysis, we also consider the effects from the neutrino mass hierarchies, i.e. the degenerate hierarchy (DH), the normal hierarchy (NH), and the inverted hierarchy (IH). We employ the current cosmological observations to do the analysis, including the Planck 2018 temperature and polarization power spectra, the baryon acoustic oscillations (BAO), the type Ia supernovae (SNe), and the Hubble constant H0 measurement. In the ΛCDM+$sum {m}_{nu }$ model, we obtain the upper limits of the neutrino mass $sum {m}_{nu }lt 0.123,mathrm{eV}$ (DH), $sum {m}_{nu }lt 0.156,mathrm{eV}$ (NH), and $sum {m}_{nu }lt 0.185,mathrm{eV}$ (IH) at the 95% C.L., using the Planck+BAO+SNe data combination. For the wCDM+$sum {m}_{nu }$ model and the CPL+$sum {m}_{nu }$ model, larger upper limits of $sum {m}_{nu }$ are obtained compared to those of the ΛCDM+$sum {m}_{nu }$ model. The most stringent constraint on the neutrino mass, $sum {m}_{nu }lt 0.080,mathrm{eV}$ (DH), is derived in the HDE+$sum {m}_{nu }$ model. In addition, we find that the inclusion of the local measurement of the Hubble constant in the data combination leads to tighter constraints on the total neutrino mass in all these dark energy models. |
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| Keywords: | neutrino mass mass hierarchies of neutrinos dark energy cosmological constraints Planck 2018 |
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