Search

We investigate how the dark energy properties impact the constraints on the total neutrino mass in interacting dark energy (IDE) models. In this study, we focus on two typical interacting dynamical dark energy models, i.e., the interacting wcold dark matter (IwCDM) model and the interacting holographic dark energy (IHDE) model. To avoid the large-scale instability problem in IDE models, we apply the parameterized post-Friedmann approach to calculate the perturbation of dark energy. We employ the Planck 2015 cosmic microwave background temperature and polarization data, combined with low-redshift measurements on baryon acoustic oscillation distance scales, type Ia supernovae, and the Hubble constant, to constrain the cosmological parameters. We find that the dark energy properties could influence the constraint limits on the total neutrino mass. Once dynamical dark energy is considered in the IDE models, the upper bounds of ∑ mvwill be changed. By considering the values of χ2min, we find that in these IDE models the normal hierarchy case is slightly preferred over the inverted hierarchy case; for example, Δχ2= 2.720 is given in the IHDE+∑ mvmodel. In addition, we also find that in the IwCDM+∑ mvmodel β= 0 is consistent with current observational data inside the 1σrange, and in the IHDE+∑ mvmodel β> 0 is favored at more than 2σlevel.