Interacting dark sector with variable vacuum energy

LUIS P. CHIMENTO, MARTÍN G. RICHARTE, IVÁN E. SÁNCHEZ GARCÍA

PHYSICAL REVIEW D

AMER PHYSICAL SOC

Lugar: New York; Año: 2013 vol. 88 p. 87301 - 87306

1550-7998

We examine a cosmological scenario where dark matter is coupled to a variable vacuum energy while baryons and photons are two decoupled components for a spatially flat Friedmann-Robertson-Walker spacetime. We apply the χ2 method to the updated observational Hubble data for constraining the cosmological parameters and analyze the amount of dark energy in the radiation era. We show that our model fulfills the severe bound of Ωx(z≃1100)