Chameleon scalar field in LRS Bianchi type I cosmological model
- Authors: Chaubey R.1, Singh A.1, Raushan R.1
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Affiliations:
- DST-Centre for Interdisciplinary Mathematical Sciences, Institute of Science
- Issue: Vol 22, No 1 (2016)
- Pages: 54-63
- Section: Article
- URL: https://journals.rcsi.science/0202-2893/article/view/176007
- DOI: https://doi.org/10.1134/S0202289316010059
- ID: 176007
Cite item
Abstract
We consider an anisotropic cosmological model with cold dark matter and a scalar field, where one component of the scale factor is taken in the framework of (i) a logamediate scenario (ii) an intermediate scenario, and (iii) an emergent scenario. In all cases we find expressions for the Chameleon field, Chameleon potential, the statefinder diagnostic pair, i.e., the {r, s} parameters, and the slow-roll parameters. All physical parameters are calculated and discussed in all three cases. It is also shown how the Chameleon field is directly affected by the role of curvature of space time. At large times (t→∞) the models tend asymptotically to an isotropic Friedmann–Robertson–Walker cosmological model.
About the authors
R. Chaubey
DST-Centre for Interdisciplinary Mathematical Sciences, Institute of Science
Author for correspondence.
Email: yahoo_raghav@rediffmail.com
India, Varanasi
Ashutosh Singh
DST-Centre for Interdisciplinary Mathematical Sciences, Institute of Science
Email: yahoo_raghav@rediffmail.com
India, Varanasi
Rakesh Raushan
DST-Centre for Interdisciplinary Mathematical Sciences, Institute of Science
Email: yahoo_raghav@rediffmail.com
India, Varanasi