TY - JOUR
T1 - Cosmological evolution of interacting dark energy in Lorentz violation
AU - Zen, Freddy P.
AU - Arianto,
AU - Gunara, Bobby E.
AU - Triyanta,
AU - Purwanto, A.
PY - 2009/10
Y1 - 2009/10
N2 - The cosmological evolution of an interacting scalar-field model in which the scalar field interacts with dark matter, radiation, and baryons via Lorentz violation is investigated. We propose a model of interaction through the effective coupling, ̄β . Using dynamical system analysis, we study the linear dynamics of an interacting model and show that the dynamics of critical points are completely controlled by two parameters. Some results can be mentioned as follows. Firstly, the sequence of radiation, the dark matter, and the scalar-field dark energy exist and baryons are subdominant. Secondly, the model also allows for the possibility of having a universe in the phantom phase with constant potential. Thirdly, the effective gravitational constant varies with respect to time through ̄β. In particular, we consider the simple case where ̄β has a quadratic form and has a good agreement with the modified ΛCDM and quintessence models. Finally, we also calculate the first post-Newtonian parameters for our model.
AB - The cosmological evolution of an interacting scalar-field model in which the scalar field interacts with dark matter, radiation, and baryons via Lorentz violation is investigated. We propose a model of interaction through the effective coupling, ̄β . Using dynamical system analysis, we study the linear dynamics of an interacting model and show that the dynamics of critical points are completely controlled by two parameters. Some results can be mentioned as follows. Firstly, the sequence of radiation, the dark matter, and the scalar-field dark energy exist and baryons are subdominant. Secondly, the model also allows for the possibility of having a universe in the phantom phase with constant potential. Thirdly, the effective gravitational constant varies with respect to time through ̄β. In particular, we consider the simple case where ̄β has a quadratic form and has a good agreement with the modified ΛCDM and quintessence models. Finally, we also calculate the first post-Newtonian parameters for our model.
UR - http://www.scopus.com/inward/record.url?scp=70349275202&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-009-1104-1
DO - 10.1140/epjc/s10052-009-1104-1
M3 - Article
AN - SCOPUS:70349275202
SN - 1434-6044
VL - 63
SP - 477
EP - 490
JO - European Physical Journal C
JF - European Physical Journal C
IS - 3
ER -