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Searching for sterile neutrinos in dynamical dark energy cosmologies

Feng, Lu; Zhang, Jing-Fei; Zhang, Xin

We investigate how the dark energy properties change the cosmological limits on sterile neutrino parameters by using recent cosmological observations. We consider the simplest dynamical dark energy models, the wCDM model and the holographic dark energy (HDE) model, to make an analysis. The cosmological observations used in this work include the Pl…

Probing the sign-changeable interaction between dark energy and dark matter with current observations

Zhang, Jing-Fei; Zhang, Xin; Li, Yun-He +2 more

We consider the models of vacuum energy interacting with cold dark matter in this study, in which the coupling can change sigh during the cosmological evolution. We parameterize the running coupling b by the form b(a) = b₀a+b_e(1‑a), where at the early-time the coupling is given by a constant b_e and today the coupli…