3 papers
astro-ph2005
Cosmological constraints on f(R) gravity theories within the Palatini approach
M. Amarzguioui, O. Elgaroy, D. F. Mota +1
We investigate f(R) theories of gravity within the Palatini approach and show how one can determine the expansion history, H(a), for an arbitrary choice of f(R). As an example, we…
astro-ph2003
The Integrated Sachs-Wolfe effect as a probe of non-standard cosmological evolution
T. Multamaki, O. Elgaroy
The Integrated Sachs-Wolfe effect is studied in non-standard cosmologies. By considering flat universes with a non-fluctuating dark energy component, it is shown how the quadrupole…
hep-th2003
Cosmological solutions of braneworlds with warped and compact dimensions
T. Multamaki, I. Vilja
We study cosmological aspects of braneworld models with a warped dimension and an arbitrary number of compact dimensions. With a stabilized radion, a number of different cosmologic…