PT Journal
AU Panotopoulos, G
TI A dynamical dark energy model with a given luminosity distance
SO General Relativity and Gravitation
JI Gen. Relativ. Gravit.
PY 2011
BP 3191
EP 3199
VL 43
IS 11
DI 10.1007/s10714-011-1230-6
LA English
DE Dark energy; Observational cosmology; Particle-theory
AB It is assumed that the current cosmic acceleration is driven by a scalar field, the Lagrangian of which is a function of the kinetic term only, and that the luminosity distance is a given function of the red-shift. Upon comparison with baryon acoustic oscillations and cosmic microwave background data the parameters of the models are determined, and then the time evolution of the scalar field is determined by the dynamics using the cosmological equations. We find that the solution is very different than the corresponding solution when the non-relativistic matter is ignored, and that the universe enters the acceleration era at larger red-shift compared to the standard I > CDM model.
ER