Observational Constraints on Oscillating Dark-Energy Parametrizations
  We perform a detailed confrontation of various oscillating dark-energy
parame-trizations with the latest sets of observational data. In particular, we
use data from 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 $\Lambda$CDM
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 peform the
Bayesian analysis, which shows that the current observational data support the
$\Lambda$CDM paradigm over this set of oscillating dark-energy
parametrizations.
