In this paper, we have presented the big rip and pseudo rip cosmological models in an extended theory of gravity. The matter field is considered to be that of perfect fluid. The geometrical parameters are adjusted in such a manner that it matches the prescriptions given by cosmological observations, to be specific to the H₀ range. The models favour phantom behaviour. The violation of strong energy conditions are shown in both the models, as it has become essential in an extended gravity theory to provide late time cosmic acceleration. We show that, the choice of the coupling parameter has significant effects on the evolution of the universe.

中文翻译：

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扩展引力理论中具有大撕裂和伪撕裂场景的宇宙学模型

在本文中，我们提出了引力扩展理论中的大裂隙和伪裂隙宇宙学模型。物质场被认为是完美流体的物质场。几何参数的调整方式使其与宇宙观测给出的规定相匹配，特定于H ₀范围。这些模型支持幻影行为。这两个模型都显示了对强能量条件的违反，因为在扩展引力理论中提供后期宇宙加速变得必不可少。我们表明，耦合参数的选择对宇宙的演化有显着影响。