Kaluza Klein Type FRW Cosmological Model With Extended Chaplygin Gas

G. S. Khadekar, N. Ramtekkar
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Abstract

Abstract In this paper we consider the extended Chaplygin gas equation of state as a model of dark energy for which it recovers barotropic fluids with quadratic equation of state. We obtain scale factor dependence energy density and Hubble expansion parameter for particular values of n, m and α. Similarly for arbitrary values of n, m and α we have discuss nature of cosmological parameters such as scale factor, Hubble expansion parameter, time dependent dark energy density and deceleration parameter in the framework of Kaluza Klein type FRW cosmological model. Further, we study stability of the model by using speed of sound and observe that the model is stable at late time.
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扩展Chaplygin气体的Kaluza Klein型FRW宇宙学模型
摘要本文将扩展的Chaplygin气体状态方程视为暗能量模型,用二次状态方程来恢复正压流体。对于n、m和α的特定值,我们获得了与比例因子相关的能量密度和哈勃展开参数。类似地,对于任意值的n、m和α,我们在Kaluza-Klein型FRW宇宙学模型的框架下讨论了宇宙学参数的性质,如比例因子、哈勃膨胀参数、随时间变化的暗能量密度和减速参数。此外,我们利用声速研究了模型的稳定性,并观察到模型在后期是稳定的。
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