Matching torsion Lambda - term with observations
Astrophysics
2009-11-07 v1
Abstract
Taking into account a torsion field gives rise to a negative pressure contribution in cosmological dynamics and then to an accelerated behaviour of Hubble fluid. The presence of torsion has the same effect of a Lambda - term. We obtain a general exact solution which well fits the data coming from high - redshift supernovae and Sunyaev - Zeldovich/X - ray method for the determination of the cosmological parameters. On the other hand, it is possible to obtain observational constraints on the amount of torsion density. A dust dominated Friedmann behaviour is recovered as soon as torsion effects are not relevant.
Cite
@article{arxiv.astro-ph/0209610,
title = {Matching torsion Lambda - term with observations},
author = {S. Capozziello and V. F. Cardone and E. Piedipalumbo and M. Sereno and A. Troisi},
journal= {arXiv preprint arXiv:astro-ph/0209610},
year = {2009}
}
Comments
14 pages, 3 figures, accepted for publication on Int. Journ. Mod. Phys. D