A new variable modified Chaplygin gas model interacting with a scalar field

W. Chakraborty1 and U. Debnath2

Abstract

We present a new form of the well-known Chaplygin gas model by introducing inhomogeneity in the equation of state. This model explains w = -1 crossing. We also give a graphic representation of the model using the {r, s} parameters. We considered an interaction of this model with a scalar field by introducing a phenomenological coupling function and show that the potential decays with time.

References

  1. N. A. Bachall, J. P. Ostriker, S. Perlmutter, and P. J. Steinhardt, Science 284, 1481 (1999).
  2. S. J. Perlmutter et al., Astrophys. J. 517, 565 (1999).
  3. V. Sahni and A. A. Starobinsky, Int. J. Mod. Phys. A 9, 373 (2000).
  4. P. J. E. Peebles and B. Ratra, Rev. Mod. Phys. 75, 559 (2003).
  5. T. Padmanabhan, Phys. Rep. 380, 235 (2003).
  6. E. J. Copeland, M. Sami, and S. Tsujikawa, Int. J. Mod. Phys. D 15, 1753 (2006).
  7. S. Das and N. Banerjee, Gen. Rel. Grav. 38 785 (2006).
  8. A. Kamenshchik, U. Moschella, and V. Pasquier, Phys. Lett. B 511, 265 (2001); V. Gorini, A. Kamenshchik, U. Moschella, and V. Pasquier, gr-qc/0403062.
  9. V. Gorini, A. Kamenshchik and U. Moschella, Phys. Rev. D 67, 063509 (2003); U. Alam, V. Sahni, T. D. Saini, and A. A. Starobinsky, Mon. Not. Roy. Astron. Soc. 344, 1057 (2003).
  10. M. C. Bento, O. Bertolami, and A. A. Sen, Phys. Rev. D 66, 043507 (2002).
  11. H. B. Benaoum, hep-th/0205140.
  12. U. Debnath, A. Banerjee, and S. Chakraborty, Class. Quantum Grav. 21, 5609 (2004).
  13. Z. K. Guo and Y. Zhang, Phys. Lett. B 645, 326 (2007), astro-ph/0506091.
  14. G. Sethi, S. K. Singh, P. Kumar, D. Jain, and A. Dev, Int. J. Mod. Phys. D 15, 1089 (2006); Z. K. Guo and Y. Z. Zhang, astro-ph/0509790.
  15. M. C. Bento, O. Bertolami, and A. A. Sen, Phys. Lett. B 575, 172 (2003).
  16. M. S. Berger and H. Shojaei, Phys. Rev. D 74, 043530 (2006).
  17. R.-G. Cai and A. Wang, JCAP 03, 002 (2005).
  18. W. Zimdahl, Int. J. Mod. Phys. D 14, 2319 (2005).
  19. B. Hu and Y. Ling, Phys. Rev. D 73. 123510 (2006).
  20. I. Brevik, O. G. Gorbunova, and A. V. Timoshkin, Eur. Phys. J. C 51, 179 (2007).
  21. V. Sahni, T. D. Saini, A. A. Starobinsky, and U. Alam, JETP Lett. 77, 201 (2003).
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