The anisotropic string cosmological model of Bianchi type I in general relativity

被引:0
作者
Kumawat, Sunil [1 ]
Poonia, Laxmi [1 ]
机构
[1] Manipal Univ Jaipur, Dept Math & Stat, Jaipur, India
来源
PROCEEDINGS OF THE INDIAN NATIONAL SCIENCE ACADEMY | 2024年 / 90卷 / 03期
关键词
Cylindrically symmetric; The inhomogeneous universe; Cosmic string; Cosmos with a cylinder-shaped inhomogeneity;
D O I
10.1007/s43538-024-00245-6
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
We study the maximum symmetric, Anisotropic, inhomogeneity string theory of Bianchi type I in general relativity. We assume Einstein string space metric depends on two variable expansion, Our four directions and these variable functions are related to the condition, a[x,t]=[b(x,t)]n\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$a[x,t] = [b(x,t)]<^>{n}$$\end{document} where c[x,t]=h(x)xk(t)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$c[x,t] = h(x) \times k(t)$$\end{document} & b[x,t]=f(x)xg(t)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$b[x,t] = f(x) \times g(t)$$\end{document} metric potential and shear tension are directly proportional to scalar expansion, Our analysis carefully incorporates a condition that links these variable functions to find the deterministic solution. The higher and varied dimensions models' geometrical and physical characteristics are also looked at.
引用
收藏
页码:697 / 701
页数:5
相关论文
共 14 条
[1]   Dynamical aspects of anisotropic Bianchi type VI0 cosmological model with dark energy fluid and massive scalar field [J].
Aditya, Y. ;
Raju, K. D. ;
Ravindranath, P. J. ;
Reddy, D. R. K. .
INDIAN JOURNAL OF PHYSICS, 2021, 95 (02) :383-389
[2]  
Bali Raj, 2013, International Journal of Modern Physics: Conference Series, V22, P593, DOI 10.1142/S2010194513010726
[3]   L.R.S. Bianchi Type I string dust magnetized cosmological models [J].
Bali, R ;
Upadhaya, RD .
ASTROPHYSICS AND SPACE SCIENCE, 2003, 283 (01) :97-108
[4]   STRING COSMOLOGY IN BIANCHI-I SPACE-TIME [J].
BANERJEE, A ;
SANYAL, AK ;
CHAKRABORTY, S .
PRAMANA-JOURNAL OF PHYSICS, 1990, 34 (01) :1-11
[5]   SOME EXACT-SOLUTIONS IN STRING COSMOLOGY [J].
KRORI, KD ;
CHAUDHURY, T ;
MAHANTA, CR ;
MAZUMDAR, A .
GENERAL RELATIVITY AND GRAVITATION, 1990, 22 (02) :123-130
[6]  
Kumawat Sunil, 2021, Journal of Physics: Conference Series, V1921, DOI 10.1088/1742-6596/1921/1/012123
[7]   COSMIC STRINGS IN BIANCHI-III SPACETIME - INTEGRABLE CASES [J].
MAHARAJ, SD ;
LEACH, PGL ;
GOVINDER, KS .
PRAMANA-JOURNAL OF PHYSICS, 1995, 44 (06) :511-518
[8]   Bianchi type VI1 cosmological model in scale-invariant theory [J].
Mohanty, G ;
Mishra, B .
CZECHOSLOVAK JOURNAL OF PHYSICS, 2002, 52 (06) :765-773
[9]  
Poonia Laxmi, 2021, IOP Conference Series: Earth and Environmental Science, V785, DOI 10.1088/1755-1315/785/1/012018
[10]  
Poonia Laxmi, 2020, Journal of Physics: Conference Series, V1706, DOI 10.1088/1742-6596/1706/1/012042