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;
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 in questo prodotto:
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.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/204014
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 58
social impact