Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-05-27
JHEP 0909:123,2009
Physics
High Energy Physics
High Energy Physics - Theory
Footnote 5 about the the very meaning of the horizons and Hawking temperature is added; Accepted in JHEP
Scientific paper
10.1088/1126-6708/2009/09/123
Recently Horava proposed a renormalizable gravity theory in four dimensions which reduces to Einstein gravity with a non-vanishing cosmological constant in IR but with improved UV behaviors. Here, I study an IR modification which breaks "softly" the detailed balance condition in Horava model and allows the asymptotically flat limit as well. I obtain the black hole and cosmological solutions for "arbitrary" cosmological constant that represent the analogs of the standard Schwartzschild-(A)dS solutions which can be asymptotically (A)dS as well as flat and I discuss some thermodynamical properties. I also obtain solutions for FRW metric with an arbitrary cosmological constant. I study its implication to the dark energy and find that it seems to be consistent with current observational data.
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