FRW model with two-fluid source in fractal cosmology

نویسندگان

چکیده

Present paper deals with flat Friedmann - Robertson Walker (FRW) model two fluid source in fractal cosmology. In this one represents matter content of the universe and another is radiation field modeling cosmic microwave background. To get deterministic model, we have used relation between pressure density for through gamma law equation state $p_{m} = (\gamma-1)\, \rho_{m}, \,\, 1\leq \gamma\leq2$ . The solutions equations are obtained terms Kummer's confluent hypergeometric function first kind. Some physical parameters models discussed their behavior help graphs detail.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Closed FRW model in Loop Quantum Cosmology

The basic idea of the LQC applies to every spatially homogeneous cosmological model, however only the spatially flat (so called k = 0) case has been understood in detail in the literature thus far. In the closed (so called: k=1) case certain technical difficulties have been the obstacle that stopped the development. In this work the difficulties are overcome, and a new LQC model of the spatiall...

متن کامل

Open FRW model in Loop Quantum Cosmology

Open FRW model in Loop Quantum Cosmology is under consideration. The left and right invariant vector fields and holonomies along them are studied. It is shown that in the hyperbolic geometry of k = −1 it is possible to construct a suitable loop which provides us with quantum scalar constraint originally introduced by Vandersloot [19]. Such an operator has correct geometrical interpretation. The...

متن کامل

Quasilocal Energy in FRW Cosmology

This paper presents a calculation of the quasilocal energy of a generic FRW model of the universe. The results have the correct behavior in the small-sphere limit and vanish for the empty Milne universe. Higher order corrections are found when comparing these results to classical calculations of cosmological energy. This case is different from others in the literature chiefly in that it involve...

متن کامل

Modified Averaging Processes in Cosmology and the Structured FRW model

We study the volume averaging of inhomogeneous metrics within GR and discuss its shortcomings such as gauge dependence, singular behavior as a result of caustics, and causality violations. To remedy these shortcomings, we suggest some modifications to this method. As a case study we focus on the inhomogeneous structured FRW model based on a flat LTB metric. The effect of averaging is then studi...

متن کامل

An open FRW model in Loop Quantum Cosmology

Open FRW model in Loop Quantum Cosmology is under consideration. The left and right invariant vector fields and holonomies along them are studied. It is shown that in the hyperbolic geometry of k = −1 itis possible to construct a suitable loop which provides us with quantum scalar constraint originally introduced by Vandersloot [19]. The quantum scalar constraint operator with negative cosmolog...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Pramana

سال: 2022

ISSN: ['0304-4289', '0973-7111']

DOI: https://doi.org/10.1007/s12043-022-02364-5