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; M., Capone; Piedipalumbo, Ester; Rubano, Claudio; Scudellaro, Paolo. - STAMPA. - (2004), pp. 1-4. (Intervento presentato al convegno XXXIX Rencontres de Moriond: Exploring the Universe. Contents and Structures of the Universe tenutosi a La Thuile nel March 28 - April 4, 2004).
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.| File | Dimensione | Formato | |
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2004-moriond_lathuile_c-r-s-r-c.ps
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