2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/194251In this article we study closed inflationary universe models by using a tachyonic field theory. We determine and characterize the existence of an universe with $Ω> 1$, and which describes a period of inflation. We find that considered models are less restrictive compared to the standard ones with a scalar field. We use recent astronomical observations to constraint the parameters appearing in the model. Obtained results are compared to those found in the standard scalar field inflationary universes.8 pages, 2 figures. Minor changes, typos corrected. Accepted for publication in Eur. Phys. J. CAstrophysicstext