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INVE_MEM_2008_53364.pdf
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Fernández Jambrina
Leonardo

Lazkoz
Ruth
Cosmological singularities and modified theories of gravity
American Institute of Physics (AIP)
byncnd
unpub
 fisica
public
paper
Dark energy, modified gravity, singularities, Friedmann equation
We consider perturbative modifications of the Friedmann equations in terms of density corresponding to modified theories of gravity proposed as an alternative route to comply with the observed accelerated expansion of the universe. Assuming that the present matter content of the universe is a pressureless fluid, the possible singularities that may arise as the final state of the universe are surveyed. It is shown that, at most, two coefficients of the perturbative expansion of the Friedman equations are relevant for the analysis. Some examples of application of the perturbative scheme are included.
published
2009
Melville, N.Y. (EEUU)
00
1122
Spanish Relativity Meeting 2008; Encuentros Relativistas Españoles (ERE2008)
Salamanca, España
15/09/200819/09/2008
conference
Navales
Ensenanzas
TRUE
9780735406582
Spanish Relativity Meeting 2008 Proceedings
http://campus.usal.es/~ere2008/website/modules/tinyd0/index.php?id=1