Preprint Article Version 1 This version is not peer-reviewed

Bianchi Type I Cosmological Models with Expansion Driven by Particle Creation

Version 1 : Received: 28 October 2018 / Approved: 30 October 2018 / Online: 30 October 2018 (09:36:05 CET)

How to cite: Desikan, K. Bianchi Type I Cosmological Models with Expansion Driven by Particle Creation. Preprints 2018, 2018100722 (doi: 10.20944/preprints201810.0722.v1). Desikan, K. Bianchi Type I Cosmological Models with Expansion Driven by Particle Creation. Preprints 2018, 2018100722 (doi: 10.20944/preprints201810.0722.v1).

Abstract

A study of Bianchi Type I cosmological model is undertaken in the framework of creation of particles. To accommodate the creation of new particles, the universe is regarded as an Open thermodynamical system. The energy conservation equation is modified with the incorporation of a creation pressure in the energy momentum tensor. Exact solutions of the field equations are obtained (i) for a particular choice of the particle creation function and (ii) by considering the deceleration parameter to be constant. In the first model the behavior of the solution at late times is investigated. The physical aspects of the model have also been discussed. In the case of the second model we have restricted our analysis to the power law behaviour for the average scale factor. This leads to a particular form for the particle creation function. The behavior of the solution is investigated and the physical aspects of the model have also been discussed for the matter dominated era.

Subject Areas

cosmology; Bianchi Type I; particle creation; open thermodynamic system; constant deceleration parameter; accelerated expansion; late time acceleration

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