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Dynamical system analysis of modified chaplygin gas in Einstein-Aether gravity

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Abstract

In this work we investigate the background dynamics when dark energy is coupled to dark matter with a suitable interaction in the universe described by the Einstein-Aether gravity. Dark energy in the form of modified Chaplygin gas is considered. A suitable interaction between dark energy and dark matter is considered in order to at least alleviate (if not solve) the cosmic coincidence problem. The dynamical system of equations is solved numerically and a stable scaling solution is obtained. A significant attempt towards the solution of the cosmic coincidence problem is taken. The statefinder parameters are also calculated to classify the dark energy models. Graphs and phase diagrams are drawn to study the variations of these parameters. It is also seen that the background dynamics of the modified Chaplygin gas in the Einstein-Aether gravity is completely consistent with the notion of an accelerated expansion in the late universe. Finally, it has been shown that the universe follows the power law form of expansion around the critical point.

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Authors and Affiliations

  1. Department of Mathematics, Seacom Engineering College, 711 302, Howrah, India

    Chayan Ranjit

  2. Department of Mathematics, Indian Institute of Engineering Science and Technology, Shibpur, 711 103, Howrah, India

    Prabir Rudra

  3. Department of Mathematics, Pailan College of Management and Technology, Bengal Pailan Park, 700 104, Kolkata, India

    Prabir Rudra

  4. Department of Information Technology, Narula Institute of Technology, 700109, Kolkata, India

    Sujata Kundu

Authors
  1. Chayan Ranjit
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  2. Prabir Rudra
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  3. Sujata Kundu
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Correspondence to Chayan Ranjit.

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Ranjit, C., Rudra, P. & Kundu, S. Dynamical system analysis of modified chaplygin gas in Einstein-Aether gravity. Eur. Phys. J. Plus 129, 208 (2014). https://doi.org/10.1140/epjp/i2014-14208-x

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  • DOI: https://doi.org/10.1140/epjp/i2014-14208-x

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