Eur. Phys. J. C (2013) 73: 2295
https://doi.org/10.1140/epjc/s10052-013-2295-z

Regular Article - Theoretical Physics

Intermediate-generalized Chaplygin gas inflationary universe model

Instituto de Física, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2950, Casilla, 4059, Valparaíso, Chile

^* e-mail: ramon.herrera@ucv.cl

Received: 17 October 2012
Revised: 15 November 2012
Published online: 30 January 2013

Abstract

An intermediate inflationary universe model in the context of a generalized Chaplygin gas is considered. For the matter we consider two different energy densities; a standard scalar field and a tachyon field, respectively. In general, we discuss the conditions of an inflationary epoch for these models. We also, use recent astronomical observations from Wilkinson Microwave Anisotropy Probe seven year data for constraining the parameters appearing in our models.