Delta-gravity and Dark Energy

Abstract

We present a model of the gravitational field based on two symmetric tensors. The equations of motion of test particles are derived: Massive particles do not follow a geodesic but massless particles trajectories are null geodesics of an effective metric. Outside matter, the predictions of the model coincide exactly with General Relativity, so all classical tests are satisfied. In Cosmology, we get accelerated expansion without a cosmological constant.

latex, 15 pages, accepted for publication in Physics Letters B

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Cited by in corpus (6)

• Testing the mapping between redshift and cosmic scale factor
• Redshift remapping and cosmic acceleration in dark-matter-dominated cosmological models
• Observational constraints in Delta Gravity: CMB and supernovas
• Cosmology in Delta-Gravity
• An Accelerating Universe without Lambda: Delta~Gravity Using Monte Carlo
• Optical theorem and indefinite metric in $\lambda {\varphi }^4$ delta-theory