TY - JOUR
T1 - ΛcDM epoch reconstruction from F(R, G) and modified Gauss-Bonnet gravities
AU - Elizalde, E.
AU - Myrzakulov, R.
AU - Obukhov, V. V.
AU - Sez-Gómez, D.
PY - 2010/4/14
Y1 - 2010/4/14
N2 - Dark energy cosmology is considered in a modified Gauss-Bonnet model of gravity with and without a scalar field. It is shown that these generalizations of general relativity endow it with a very rich cosmological structure: it may naturally lead to an effective cosmological constant, quintessence or phantom cosmic acceleration, with the possibility of describing the transition from a decelerating to an accelerating phase explicitly. It is demonstrated here that these modified GB and scalar-GB theories are perfectly viable as cosmological models. They can describe the ΛCDM cosmological era without any need for a cosmological constant. The specific properties of these theories of gravity in different particular cases, such as the de Sitter one, are studied. © 2010 IOP Publishing Ltd.
AB - Dark energy cosmology is considered in a modified Gauss-Bonnet model of gravity with and without a scalar field. It is shown that these generalizations of general relativity endow it with a very rich cosmological structure: it may naturally lead to an effective cosmological constant, quintessence or phantom cosmic acceleration, with the possibility of describing the transition from a decelerating to an accelerating phase explicitly. It is demonstrated here that these modified GB and scalar-GB theories are perfectly viable as cosmological models. They can describe the ΛCDM cosmological era without any need for a cosmological constant. The specific properties of these theories of gravity in different particular cases, such as the de Sitter one, are studied. © 2010 IOP Publishing Ltd.
U2 - 10.1088/0264-9381/27/9/095007
DO - 10.1088/0264-9381/27/9/095007
M3 - Article
SN - 0264-9381
VL - 27
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
IS - 9
M1 - 095007
ER -