Holographic dark energy in Brans-Dicke cosmology with Granda-Oliveros cut-off

Understand

Motivated by the recent works of one of us [1,2] we study the holographic dark energy in Brans-Dicke gravity with the Granda-Oliveros cut-off proposed recently in literature.

• We find out that when the present model is combined with Brans-Dicke field the transition from normal state where $w_D >-1 $ to the phantom regime where $w_D <-1 $ for the equation of state of dark energy can be more easily achieved for than when resort to the Einstein field equations is made.
• Furthermore, the phantom crossing is more easily achieved when the matter and the holographic dark energy undergo an exotic interaction.
• We also calculate some relevant cosmological parameters and their evolution.