09 بهمن 1401

جعفر صادقی

مرتبه علمی: استاد
نشانی: بابلسر، خ. امیر مازندرانی، ولیعصر 12، پ 78
تحصیلات: دکترای تخصصی / ذرات بنیادی
تلفن: 9111125092
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان Phenomenological Varying Modified Chaplygin Gas with Variable G and Λ: Toy Models for Our Universe
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Cosmology Dark energy
مجله INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
شناسه DOI 10.1007/s10773-015-2635-x
پژوهشگران جعفر صادقی (نفر اول) ، م خورشیدیان (نفر دوم) ، هدی فراهانی (نفر سوم)

چکیده

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.