Ali, Amna ; Sami, M. ; Sen, A. A. (2009) Transient and late time attractor tachyon dark energy: can we distinguish it from quintessence? Physical Review D - Particles, Fields, Gravitation and Cosmology, 79 (12). 123501_1-123501_7. ISSN 1550-7998
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Official URL: http://prd.aps.org/abstract/PRD/v79/i12/e123501
Related URL: http://dx.doi.org/10.1103/PhysRevD.79.123501
Abstract
The string inspired tachyon field can serve as a candidate of dark energy. Its equation of state parameter w varies from 0 to -1. In the case of tachyon field potential V(Φ)→0 slower (faster) than 1/Φ2 at infinity, dark energy (dark matter) is a late time attractor. We investigate the tachyon dark energy models under the assumption that w is close to -1. We find that all the models exhibit unique behavior around the present epoch which is exactly the same as that of the thawing quintessence.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 70505 |
| Deposited On: | 21 Nov 2011 05:42 |
| Last Modified: | 21 Nov 2011 05:42 |
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