A test of Hořava gravity: the dark energy
- Research Institute of Physics and Chemistry, Chonbuk National University, Chonju 561-756 (Korea, Republic of)
Recently Hořava proposed a renormalizable gravity theory with higher spatial derivatives in four dimensions which reduces to Einstein gravity with a non-vanishing cosmological constant in IR but with improved UV behaviors. Here, I consider a non-trivial test of the new gravity theory in FRW universe by considering an IR modification which breaks ''softly'' the detailed balance condition in the original Hořava model. I separate the dark energy parts from the usual Einstein gravity parts in the Friedman equations and obtain the formula of the equations of state parameter. The IR modified Hořava gravity seems to be consistent with the current observational data but we need some more refined data sets to see whether the theory is really consistent with our universe. From the consistency of our theory, I obtain some constraints on the allowed values of w{sub 0} and w{sub a} in the Chevallier, Polarski, and Linder's parametrization and this may be tested in the near future, by sharpening the data sets.
- OSTI ID:
- 22272935
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2010, Issue 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cosmological QCD phase transition in steady non-equilibrium dissipative Hořava–Lifshitz early universe
Dirac fields, torsion and Barbero-Immirzi parameter in cosmology