Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/127553
Title: | An effective theory of accelerated expansion |
Author: | Talavera Sánchez, Pedro Jiménez, Raúl (Jiménez Tellado) Verde, Licia |
Keywords: | Expansió de l'univers Energia fosca (Astronomia) Expanding universe Dark energy (Astronomy) |
Issue Date: | 2011 |
Publisher: | Institute of Physics (IOP) |
Abstract: | We work out an effective theory of accelerated expansion for the background to describe general phenomena of inflation and acceleration (dark energy) in the universe. Our aim is to determine from theoretical grounds, in a physically motivated and model-independent way, which and how many (free) parameters are needed to broadly capture the physics of a theory describing the background of cosmic acceleration. Our goal is to make as much transparent as possible the physical interpretation of the parameters describing the expansion. We show that, at leading order, there are five independent parameters, of which one can be constrained via general relativity tests. The other four parameters need to be determined by observing and measuring the cosmic expansion rate only, H(z). Therefore, we suggest that future cosmology surveys focus on obtaining an accurate value as possible measurement of H(z) to constrain the nature of accelerated expansion. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1142/S0217751X12501746 |
It is part of: | Journal of Cosmology and Astroparticle Physics, 2011, vol. 27, num. 30, p. 1250174-1-1250174-17 |
URI: | http://hdl.handle.net/2445/127553 |
Related resource: | https://doi.org/10.1142/S0217751X12501746 |
ISSN: | 1475-7516 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Publicacions de projectes de recerca finançats per la UE |
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