Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-05-22
Phys.Rev.D76:083514,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 2 figures, added comments, references updated
Scientific paper
10.1103/PhysRevD.76.083514
We consider a braneworld model with bulk-brane energy exchange. This allows for crossing of the w=-1 phantom divide line without introducing phantom energy with quantum instabilities. We use the latest SnIa data included in the Gold06 dataset to provide an estimate of the preferred parameter values of this braneworld model. We use three fitting approaches which provide best fit parameter values and hint towards a bulk energy component that behaves like relativistic matter which is propagating in the bulk and is moving at a speed v along the fifth dimension, while the bulk-brane energy exchange component corresponds to negative pressure and signifies energy flowing from the bulk into the brane. We find that the best fit effective equation of state parameter $w_{eff}$ marginally crosses the phantom divide line w=-1. Thus, we have demonstrated both the ability of this class of braneworld models to provide crossing of the phantom divide and also that cosmological data hint towards natural values for the model parameters.
Bogdanos Charalampos
Nesseris Savas
Perivolaropoulos Leandros
Tamvakis Kyriakos
No associations
LandOfFree
Cosmic Acceleration Data and Bulk-Brane Energy Exchange does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmic Acceleration Data and Bulk-Brane Energy Exchange, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic Acceleration Data and Bulk-Brane Energy Exchange will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-416147