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Time-Dependent Density of Modified Cosmic Chaplygin Gas with Variable Cosmological Constant in Non-Flat Universe

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Abstract

In this paper we study modified cosmic Chaplygin cosmology with non-zero cosmological constant in non-flat Universe. By using well-known forms of scale factor we obtain time-dependent dark energy density by numerical analysis of non-linear differential equation and fitting curves. We use observational data to fix solution and discuss about stability of our system. First of all we consider cosmological constant as a constant in Einstein equation, and then study possibility of variable cosmological constant.

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Authors and Affiliations

  1. Department of Physics, Ayatollah Amoli Branch, Islamic Azad University, P.O. Box 678, Amol, Iran

    J. Sadeghi & H. Farahani

  2. Young Researchers Club, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran

    B. Pourhassan

  3. Department of Theoretical Physics, Yerevan State University, 1 Alex Manookian, 0025, Yerevan, Armenia

    M. Khurshudyan

Authors
  1. J. Sadeghi
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  2. B. Pourhassan
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  3. M. Khurshudyan
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  4. H. Farahani
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Corresponding author

Correspondence to H. Farahani.

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Sadeghi, J., Pourhassan, B., Khurshudyan, M. et al. Time-Dependent Density of Modified Cosmic Chaplygin Gas with Variable Cosmological Constant in Non-Flat Universe. Int J Theor Phys 53, 911–920 (2014). https://doi.org/10.1007/s10773-013-1881-z

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  • DOI: https://doi.org/10.1007/s10773-013-1881-z

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