Observational Constraints on Teleparallel Dark Energy

Details Observational Constraints on Teleparallel Dark Energy Observational Constraints on Teleparallel Dark Energy

2011-10-05

arxiv.org/abs/1110.0913v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

19 pages, 6 figures, version accepted by JCAP

Scientific paper

10.1088/1475-7516/2012/01/002

We use data from Type Ia Supernovae (SNIa), Baryon Acoustic Oscillations (BAO), and Cosmic Microwave Background (CMB) observations to constrain the recently proposed teleparallel dark energy scenario based on the teleparallel equivalent of General Relativity, in which one adds a canonical scalar field, allowing also for a nonminimal coupling with gravity. Using the power-law, the exponential and the inverse hyperbolic cosine potential ansatzes, we show that the scenario is compatible with observations. In particular, the data favor a nonminimal coupling, and although the scalar field is canonical the model can describe both the quintessence and phantom regimes.

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