We show that a general, exact cosmological solution, where the dynamics of a scalar field is assigned by an exponential potential, satisfies all the issues of the 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 is wrong.
Exponential potentials for tracker fields / Rubano, Claudio; Scudellaro, Paolo; Piedipalumbo, Ester; Capozziello, Salvatore; M., Capone. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 69D:(2004), pp. 103510-1-103510-3.
Exponential potentials for tracker fields
RUBANO, CLAUDIO;SCUDELLARO, PAOLO;PIEDIPALUMBO, ESTER;CAPOZZIELLO, SALVATORE;
2004
Abstract
We show that a general, exact cosmological solution, where the dynamics of a scalar field is assigned by an exponential potential, satisfies all the issues of the 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 is wrong.| File | Dimensione | Formato | |
|---|---|---|---|
|
2004-PRD69_r-s-p-c-c.pdf
non disponibili
Tipologia:
Documento in Post-print
Licenza:
Accesso privato/ristretto
Dimensione
538.74 kB
Formato
Adobe PDF
|
538.74 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
