Torsion Cosmology of Poincaré gauge theory and the constraints of its parameters via SNeIa data

Details Torsion Cosmology of Poincaré gauge theory and the constraints of its parameters via SNeIa data Torsion Cosmology of Poincaré gauge theory and the constraints of its parameters via SNeIa data

2011-11-10

arxiv.org/abs/1111.2385v1

JCAP 1202:003,2012

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10pages,5 figures

Scientific paper

10.1088/1475-7516/2012/02/003

Poincar\`e gauge theory (PGT) is an alternative gravity theory, which attempts to bring the gravity into the gauge-theoretic frame, where the Lagrangian is quadratic in torsion and curvature. Recently, the cosmological models with torsion based on this theory have drawn many attentions, which try to explain the cosmic acceleration in a new way. Among these PGT cosmological models, the one with only even parity dynamical modes -- SNY model, for its realistic meaning, is very attractive. In this paper, we first analyze the past-time cosmic evolution of SNY model analytically. And based on these results we fit this model to the most comprehensive SNeIa data (Union 2) and thus find the best-fit values of model parameters and initial conditions, whose related $\chi^{2}$ value is consistent with the one from $\Lambda$CMD at the 1$\sigma$ level. Also by the $\chi^{2}$ estimate, we provide certain constraints on these parameters. Using these best-fit values for the Union 2 SNeIa dataset, we are able to predict the evolution of our real universe over the late time. From this prediction, we know the fate of our universe that it would expand forever, slowly asymptotically to a halt, which is in accordance with the earlier works.

Affiliated with

Also associated with

No associations

Rating

Torsion Cosmology of Poincaré gauge theory and the constraints of its parameters via SNeIa data 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 Torsion Cosmology of Poincaré gauge theory and the constraints of its parameters via SNeIa data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Torsion Cosmology of Poincaré gauge theory and the constraints of its parameters via SNeIa data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-727664