We show that a general, exact cosmological solution, where dynamics of scalar field is assigned by an exponential potential, fulfills all the issues of a dark energy approach, both from a theoretical point of view and in comparison with available observational data. Moreover, tracking conditions are discussed, with a new treatment of the well known condition Gamma greater than 1. We prove that the currently used expression for Gamma has to be revised.

Exponential potentials for tracker fields

CAPOZZIELLO, SALVATORE;PIEDIPALUMBO, ESTER;RUBANO, CLAUDIO;SCUDELLARO, PAOLO
2004

Abstract

We show that a general, exact cosmological solution, where dynamics of scalar field is assigned by an exponential potential, fulfills all the issues of a dark energy approach, both from a theoretical point of view and in comparison with available observational data. Moreover, tracking conditions are discussed, with a new treatment of the well known condition Gamma greater than 1. We prove that the currently used expression for Gamma has to be revised.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/121291
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