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Jafar Sadeghi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address:
Phone: 9111125092

Research

Title
Phenomenological Varying Modified Chaplygin Gas with Variable G and Λ: Toy Models for Our Universe
Type
JournalPaper
Keywords
Cosmology Dark energy
Year
2016
Journal INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
DOI
Researchers Jafar Sadeghi ، M. Khurshdyan ، Hoda Farahani

Abstract

In this paper, we have considered varying modified Chaplygin gas in case of variable G and Λ. Since varying G and Λ give rises to modified form of field equations and conservation law, we have considered two different toy models. In the first model, the Universe is filled with a phenomenological gas while in the second one, there is the existence of gas and a matter with P = ω(t)ρm. By considering sign changeable interaction between fluids we have analyzed important cosmological parameters such as EoS parameter of the fluids and deceleration parameter q of the models.