Closed inflationary universe with tachyonic field

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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 $Ω> 1$, 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. C

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/194251

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/0703628
 http://arxiv.org/abs/astro-ph/0703628
 Eur.Phys.J.C51:185-192,2007
 doi:10.1140/epjc/s10052-007-0288-5

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arXiv