IAFE 05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
Observational information for f(T) theories and Dark Torsion
Autor/es:
BENGOCHEA G. R.
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2011 vol. 695 p. 405 - 411
ISSN:
0370-2693
Resumen:
In the present work we analyze and compare the information comingfrom different observational data sets in the context of a sort off(T) theories. We perform a joint analysis with measurements ofthe most recent type Ia supernovae (SNe Ia), Baryon AcousticOscillation (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. Itis shown that when the new combined BAO/CMB parameter is used toput constraints, the result is different from previous works. Wealso show that when we include Observational Hubble Data (OHD) thesimpler LambdaCDM model is excluded to one sigma level, leadingthe effective equation of state of these theories to be of phantomtype. Also, analyzing a tension criterion for SNe Ia and otherobservational sets, we obtain more consistent and better suiteddata sets to work with these theories.
