Magnitude-redshift relation with varying dark-energy density

Details Magnitude-redshift relation with varying dark-energy density Magnitude-redshift relation with varying dark-energy density

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006gregr..38..311f&link_type=abstract

General Relativity and Gravitation, Volume 38, Issue 2, pp.311-324

Mathematics

Logic

2

Accelerating Universe, Variable Lambda, M-Z Relation

Scientific paper

The magnitude-redshift test is applied to cosmological models in extended theories of gravity containing extra terms in the Lagrangian which give rise to an evolving dark-energy component. Two classes of models are considered: one based on generalized scalar-tensor theory and the other on curvature corrections to the metric tensor. Results are compared to recent observational data of Type Ia supernovae. The predictions of both kinds of models may provide better fits to the data depending on dimensionless free parameters of order ˜ 0.01-0.1.

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