Closed inflationary universe with tachyonic field

Abstract

In this article we study closed inflationary universe models by using a tachyonic field theory. We determine and characterize the existence of an universe with $\Omega >1$, 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. C

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