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We investigate various anisotropic spherical distributions of charged celestial bodies within the context of f(R) gravity, where R represents the Ricci scalar. The properties of specific charged compact objects are analyzed by using the…

广义相对论与量子宇宙学 · 物理学 2025-05-13 W. U. Rahman , M. Ilyas , Yi Zhong , De-Liang Yao

In the current study, we investigated a specific model of anisotropic strange stars specially Her X-1, in the background of modified f(R,T) gravity by choosing f(R,T) = R+2{\xi}T, where R is Ricci scalar, T is the trace of the…

广义相对论与量子宇宙学 · 物理学 2022-02-17 H. D. Singh , J. Kumar

In the present paper we exhaustively examine the physical status of the socalled Matese-Whitman mass function [J.J. Matese and P.G. Whitman, Phys. Rev. D, 22, 1270 (1980)]. As a first step, we construct the relevant Einstein field equations…

广义相对论与量子宇宙学 · 物理学 2017-06-05 Dibyendu Shee , Debabrata Deb , Shounak Ghosh , B. K. Guha , Saibal Ray

We present numerical solutions for stationary and axisymmetric equilibriums of compact stars associated with extremely strong magnetic fields. The interior of the compact stars is assumed to satisfy ideal magnetohydrodynamic (MHD)…

广义相对论与量子宇宙学 · 物理学 2025-12-22 Koji Uryu , Shijun Yoshida , Eric Gourgoulhon , Charalampos Markakis , Kotaro Fujisawa , Antonios Tsokaros , Keisuke Taniguchi , Mina Zamani

We investigate theoretical and observational constraints on the mass-radius relations for neutron stars. For that purpose we consider the model of neutron stars taking into considerations strong, weak, electromagnetic and gravitational…

高能天体物理现象 · 物理学 2016-06-28 Kuantay Boshkayev , Jorge A. Rueda , Marco Muccino

This paper investigates a spherically symmetric compact relativistic body with isotropic pressure profiles within the framework of general relativity. In order to solve the Einstein's field equations, we have considered the Vaidya-Tikekar…

星系天体物理 · 物理学 2021-11-29 Jitendra Kumar , Puja Bharti

We investigate a compact spherically symmetric relativistic body with anisotropic particle pressure profiles. The distribution possesses characteristics relevant to modeling compact stars within the framework of general relativity. For this…

广义相对论与量子宇宙学 · 物理学 2018-02-28 S. K. Maurya , Ayan Banerjee , Sudan Hansraj

We present the first numerical solutions of the coupled Einstein-Maxwell equations describing rapidly rotating neutron stars endowed with a magnetic field. These solutions are fully relativistic and self-consistent, all the effects of the…

广义相对论与量子宇宙学 · 物理学 2007-05-23 M. Bocquet , S. Bonazzola , E. Gourgoulhon , J. Novak

The spacetime around compact objects is an excellent place to study gravity in the strong, nonlinear, dynamical regime where solar system tests cannot account for the effects of large curvature. Understanding the dynamics of this spacetime…

广义相对论与量子宇宙学 · 物理学 2019-09-02 Alexander Saffer , Hector O. Silva , Nico Yunes

We obtain a new class of exact solutions for the Einstein-Maxwell system in static spherically symmetric charged star in (2+1)-dimensional gravity. In order to obtain the analytical solutions we treat the matter distribution anisotropic in…

广义相对论与量子宇宙学 · 物理学 2015-06-22 Ayan Banerjee , Farook Rahaman , Tanuka Chattopadhyay

We study the bound on the compactness of a stellar object in pure Lovelock theories of arbitrary order in arbitrary spacetime dimensions, involving electromagnetic field. The bound we derive for a generic pure Lovelock theory, reproduces…

广义相对论与量子宇宙学 · 物理学 2020-07-06 Sumanta Chakraborty , Naresh Dadhich

We study a specific model of anisotropic strange stars in the modified $f\left(R,\mathcal{T}\right)$-type gravity by deriving solutions to the modified Einstein field equations representing a spherically symmetric anisotropic stellar…

广义相对论与量子宇宙学 · 物理学 2019-05-01 Debabrata Deb , Sergei V. Ketov , S. K. Maurya , Maxim Khlopov , P. H. R. S. Moraes , Saibal Ray

In the present work authors derive exact solutions for the relativistic compact stars in the presence of two fields axion (Dante's Inferno model) and with/without the complex scalar field (with the quartic self-interaction) coupled to…

广义相对论与量子宇宙学 · 物理学 2022-02-07 Oleksii Sokoliuk , Alexander Baransky , Praduymn Kumar Sahoo

In this paper, we have presented a compact object model in the framework of Einstein-Gauss-Bonnet gravity (EGB) with a linear equation of state considering a metric potential proposed for Buchdahl (1959). The new obtained models satisfy all…

广义相对论与量子宇宙学 · 物理学 2023-01-24 Manuel Malaver , Rajan Iyer , Israr Khan

In the present article, we discover a new well-behaved charged anisotropic solution of Einstein-Maxwell's field equations. We ansatz the metric potential $g_{00}$ of the form given by Maurya el al. (arXiv:1607.05582v1) with $n=2$. In their…

综合物理 · 物理学 2017-07-05 Piyali Bhar , Ksh. Newton Singh , Farook Rahaman , Neeraj Pant , Sumita Banerjee

The stability and other physical properties of a class of regular black holes, quasiblack holes, and other electrically charged compact objects are investigated in the present work. The compact objects are obtained by solving the…

广义相对论与量子宇宙学 · 物理学 2021-08-12 Angel D. D. Masa , Enesson S. de Oliveira , Vilson T. Zanchin

We investigate the thermodynamic properties of strange quark matter under the strong magnetic field in the framework of the MIT bag model in two cases of bag constants. We consider two cases of the magnetic field, the uniform magnetic field…

核理论 · 物理学 2020-04-10 Fatemeh Kayanikhoo , Kazem Naficy , Gholam Hossein Bordbar

In this paper we consider a special case of vacuum non-linear electrodynamics with a stress-energy tensor conformal to the Maxwell theory. Distinctive features of this model are: the absence of dimensional parameter for non-linearity…

广义相对论与量子宇宙学 · 物理学 2022-10-19 I. P. Denisova , B. D. Garmaev , V. A. Sokolov

A novel equation of state with the surface tension induced by particles' interactions was generalized to describe the properties of the neutron stars (NSs). In this equation the interaction between particles occurs via the hard core…

高能天体物理现象 · 物理学 2017-12-19 Violetta V. Sagun , Ilidio Lopes

We analyze the cosmology of the Randall-Sundrum model and that of compact brane models in general in the presence of a radius stabilization mechanism. We find that the expansion of our universe is generically in agreement with the expected…

高能物理 - 唯象学 · 物理学 2009-09-15 Csaba Csaki , Michael Graesser , Lisa Randall , John Terning