Brane-Bulk energy exchange and agegraphic dark energy

Details Brane-Bulk energy exchange and agegraphic dark energy Brane-Bulk energy exchange and agegraphic dark energy

2009-08-09

arxiv.org/abs/0908.1214v2

Int.J.Mod.Phys.D19:305-316,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, to appear in IJMPD

Scientific paper

10.1142/S0218271810016427

We consider the agegraphic models of dark energy in a braneworld scenario with brane-bulk energy exchange. We assume that the adiabatic equation for the dark matter is satisfied while it is violated for the agegraphic dark energy due to the energy exchange between the brane and the bulk. Our study shows that with the brane-bulk interaction, the equation of state parameter of agegraphic dark energy on the brane, $w_D$, can have a transition from normal state where $w_D >-1 $ to the phantom regime where $w_D <-1 $, while the effective equation of state for dark energy always satisfies $w^{\mathrm{eff}}_D\geq-1$.

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