Abstract
Subject of our interest is an extended Chaplygin gas cosmology and new receipts providing accelerated expansion of the large scale universe. In Literature a variety of cosmological models exist studying the behavior of the universe in the presence of Chaplygin gas. From its initial form Chaplygin gas evolved and accepted different EoS-s and we will work with one of them. The main purpose of this work is to study behavior of the universe in Lyra Manifold with a varying \(\varLambda\)-term, which does give us modified field equations. Modified field equations compared to field equations of General Relativity provide a new parametrization of dark energy sector of the large scale universe. It is also interesting to study the behavior of the universe in case of an existing coupling between quintessence DE and extended Chaplygin gas. We applied observational constraints and causality issue to separate physically relevant behavior of the phenomenological model.
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Acknowledgements
M. Khurshudyan is grateful to Prof E. Kokanyan for warm hospitality, comprehensive support and stimulating discussion.
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Khurshudyan, M. Interacting extended Chaplygin gas cosmology in Lyra manifold. Astrophys Space Sci 360, 44 (2015). https://doi.org/10.1007/s10509-015-2557-3
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DOI: https://doi.org/10.1007/s10509-015-2557-3