Eur. Phys. J. C (2007) 51: 185-192
https://doi.org/10.1140/epjc/s10052-007-0288-5

Regular Article - Theoretical Physics

Closed inflationary universe with tachyonic field

Instituto de Física, Pontificia Universidad Católica de Valparaíso, Casilla, 4950, Valparaíso, Chile

^* e-mail: pedro.labrana@ucv.cl

Received: 25 January 2007
Published online: 1 June 2007

Abstract

In this article we study closed inflationary universe models by using a tachyonic field theory. We determine and characterize the existence of a universe which has Ω>1 and which describes a period of inflation. We find that the considered models are less restrictive compared to the standard ones with a scalar field. We use recent astronomical observations to constrain the parameters appearing in the model. The results obtained are compared to those found in the standard scalar field inflationary universes.