Observational constraints on oscillating dark-energy parametrizations

We perform a detailed confrontation of various oscillating dark-energy parametrizations with the latest sets of observational data. In particular, we use data from the joint light curve analysis (JLA) sample from supernoave type Ia, baryon acoustic oscillations (BAO) distance measurements, cosmic microwave background (CMB) observations, redshift space distortion, weak gravitational lensing, Hubble parameter measurements from cosmic chronometers, and we impose constraints on four oscillating models. From the analyses, we find that the best-fit characters of almost all models are bent towards the phantom region; nevertheless, in all of them, the quintessential regime is also allowed within 1 sigma confidence level. Furthermore, the deviations from ACDM cosmology are not significant; however, for two of the models they could be visible at large scales, through the impact on the temperature anisotropy of the CMB spectra and on the matter power spectra. Finally, we perform the Bayesian analysis, which shows that the current observational data support the ACDM paradigm over this set of oscillating dark-energy parametrizations.