Observational information for f(T) theories and Dark Torsion

By Gabriel Bengochea. 2010

210 citations recorded by the source corpus.

Abstract In the present work we analyze and compare the information coming from different observational data sets in the context of a sort of f ( T ) theories. We perform a joint analysis with measurements of the most recent type Ia supernovae (SNe Ia), Baryon Acoustic Oscillation (BAO), Cosmic Microwave Background radiation (CMB), Gamma-Ray Bursts data (GRBs) and Hubble parameter observations (OHD) to constraint the only new parameter these theories have. It is shown that when the new combined BAO/CMB parameter is used to put constraints, the result is different from previous works. We also show that when we include Observational Hubble Data (OHD) the simpler ΛCDM model is excluded to one sigma level, leading the effective equation of state of these theories to be of phantom type. Also, analyzing a tension criterion for SNe Ia and other observational sets, we obtain more consistent and better suited data sets to work with these theories.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/067838f395aae9f501db1e62c1f61ad85b124fff

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In Astronomy and Astrophysics

Citations in the corpus

Observational constraints on teleparallel dark energy (2011, background): “The first is to replace T by an arbitrary function f(T ) [41, 42, 46–72], similar to f(R) extensions of GR, and obtain new interesting terms in the field equations.”
Modified Gravity and Cosmology (2011, background): “A large number of papers have followed [135] in a short space of time, exploring the transition from deceleration to acceleration, observational constraints, conformal transformations, and structure formation [815, 1287, 932, 1288, 1227, 289, 134, 1286, 78, 933, 681, 1293, 1308, 79].”
Solar system constraints on f(T) gravity (2012, methodology): “(2012), Wu & Yu (2010b), Bengochea (2011), Ferraro & Fiorini (2011c), Daouda et al. (2011), Daouda et al. (2012a)), as well as in its black hole solutions (Wang (2011), Miao et al. (2011), Wei et al (2012), Ferraro & Fiorini (2011b)), the authors still use thsimple relation between the vierbeins…”