Nonstatic charged fluid spheres in general relativity

1984 ◽  
Vol 16 (4) ◽  
pp. 381-385 ◽  
Author(s):  
S. Chatterjee
Keyword(s):  
General Relativity ◽  
Charged Fluid ◽  
Fluid Spheres

Some static relativistic compact charged fluid spheres in general relativity

2013 ◽  
Vol 350 (1) ◽  
pp. 293-305 ◽  
Author(s):  
Mohammad Hassan Murad ◽  
Saba Fatema
Keyword(s):  
General Relativity ◽  
Charged Fluid ◽  
Fluid Spheres

Variety of Well behaved parametric classes of relativistic charged fluid spheres in general relativity

2011 ◽  
Vol 333 (1) ◽  
pp. 161-168 ◽  
Author(s):  
Neeraj Pant ◽  
S. Rajasekhara
Keyword(s):  
General Relativity ◽  
Charged Fluid ◽  
Fluid Spheres

scholarly journals Tolman-Bayin type static charged fluid spheres in general relativity

2004 ◽  
Vol 349 (4) ◽  
pp. 1331-1334 ◽  
Author(s):  
Saibal Ray ◽  
Basanti Das
Keyword(s):  
General Relativity ◽  
Charged Fluid ◽  
Fluid Spheres

scholarly journals PHYSICAL PROPERTIES OF TOLMAN–BAYIN SOLUTIONS: SOME CASES OF STATIC CHARGED FLUID SPHERES IN GENERAL RELATIVITY

2007 ◽  
Vol 16 (11) ◽  
pp. 1745-1759 ◽  
Author(s):  
SAIBAL RAY ◽  
BASANTI DAS ◽  
FAROOK RAHAMAN ◽  
SUBHARTHI RAY
Keyword(s):  
General Relativity ◽  
Physical Properties ◽  
Perfect Fluid ◽  
Mass Density ◽  
Fluid Pressure ◽  
Matter Distribution ◽  
Electromagnetic Mass ◽  
Charged Fluid ◽  
Maxwell Space ◽  
Fluid Spheres

In this article, Einstein–Maxwell space–time is considered in connection with some of the astrophysical solutions previously obtained by Tolman (1939) and Bayin (1978). The effect of inclusion of charge in these solutions is investigated thoroughly and the nature of fluid pressure and mass density throughout the sphere is discussed. Mass–radius and mass–charge relations are derived for various cases of the charged matter distribution. Two cases are obtained where perfect fluid with positive pressures gives rise to electromagnetic mass models such that gravitational mass is of purely electromagnetic origin.

Slowly rotating charged fluid spheres in general relativity

1986 ◽  
Vol 34 (2) ◽  
pp. 327-330 ◽  
Author(s):  
R. N. Tiwari ◽  
J. R. Rao ◽  
R. R. Kanakamedala
Keyword(s):  
General Relativity ◽  
Charged Fluid ◽  
Fluid Spheres

scholarly journals ISOTROPIC CASES OF STATIC CHARGED FLUID SPHERES IN GENERAL RELATIVITY

2011 ◽  
Vol 20 (09) ◽  
pp. 1675-1687 ◽  
Author(s):  
BASANTI DAS ◽  
PRATAP CHANDRA RAY ◽  
IRINA RADINSCHI ◽  
FAROOK RAHAMAN ◽  
SAIBAL RAY
Keyword(s):  
General Relativity ◽  
Analytical Solutions ◽  
Density Ratio ◽  
Compact Stars ◽  
Maxwell Field ◽  
Field Equations ◽  
Charged Fluid ◽  
Isotropic Coordinates ◽  
Charged Fluid Sphere ◽  
Fluid Spheres

In this paper we study the isotropic cases of static charged fluid spheres in general relativity. For this purpose we consider two different specializations and under these we solve the Einstein–Maxwell field equations in isotropic coordinates. The analytical solutions thus obtained are matched to the exterior Reissner–Nordström solutions which concern the values for the metric coefficients eν and eμ. We derive the pressure, density and pressure-to-density ratio at the center of the charged fluid sphere and boundary R of the star. Our conclusion is that static charged fluid spheres provide a good connection to compact stars.

Evolution of radiating charged spheres in general relativity

1988 ◽  
Vol 66 (11) ◽  
pp. 981-986 ◽  
Author(s):  
V. Medina ◽  
L. Núñez ◽  
H. Rago ◽  
A. Patiño
Keyword(s):  
General Relativity ◽  
Energy Density ◽  
Radial Velocity ◽  
Maxwell Equations ◽  
Charged Fluid ◽  
Vaidya Solution ◽  
Physical Variables ◽  
Electric Charge Distribution ◽  
Fluid Spheres ◽  
Charged Spheres

A method reported by Herrera et al. is extended to study radiating, charged, fluid spheres. A heuristic assumption relating pressure, energy density, the radial velocity of matter, and the electric-charge distribution is introduced. This ansatz, together with matching the boundaries with those of the Reissner–Nordstrom–Vaidya solution, leads to a system of ordinary differential equations for quantities evaluated at the surface. The integration allows one to obtain the profile of the physical variables for any piece of material via the Einstein–Maxwell equations. As an example of the procedure, a particular model is worked out in some detail.

Three new exact solutions for charged fluid spheres in general relativity

2014 ◽  
Vol 356 (1) ◽  
pp. 75-87 ◽  
Author(s):  
S. K. Maurya ◽  
Y. K. Gupta ◽  
Baiju Dayanandan ◽  
T. T. Smitha
Keyword(s):  
General Relativity ◽  
Exact Solutions ◽  
Charged Fluid ◽  
New Exact Solutions ◽  
Fluid Spheres

scholarly journals Counterexamples to the Maximum Force Conjecture

Universe ◽  
2021 ◽  
Vol 7 (11) ◽  
pp. 403
Author(s):  
Aden Jowsey ◽  
Matt Visser
Keyword(s):  
General Relativity ◽  
Dimensional Analysis ◽  
Maximum Force ◽  
Explicit Calculation ◽  
General Notion ◽  
Physical Situation ◽  
Speed Of Light ◽  
Maximum Tension ◽  
Dimensionless Function ◽  
Fluid Spheres

Dimensional analysis shows that the speed of light and Newton’s constant of gravitation can be combined to define a quantity F*=c4/GN with the dimensions of force (equivalently, tension). Then in any physical situation we must have Fphysical=fF*, where the quantity f is some dimensionless function of dimensionless parameters. In many physical situations explicit calculation yields f=O(1), and quite often f≤1/4. This has led multiple authors to suggest a (weak or strong) maximum force/maximum tension conjecture. Working within the framework of standard general relativity, we will instead focus on idealized counter-examples to this conjecture, paying particular attention to the extent to which the counter-examples are physically reasonable. The various idealized counter-examples we shall explore strongly suggest that one should not put too much credence into any truly universal maximum force/maximum tension conjecture. Specifically, idealized fluid spheres on the verge of gravitational collapse will generically violate the weak (and strong) maximum force conjectures. If one wishes to retain any truly general notion of “maximum force” then one will have to very carefully specify precisely which forces are to be allowed within the domain of discourse.

A singularity-free solution for a charged fluid sphere in general relativity

1975 ◽  
Vol 8 (4) ◽  
pp. 508-511 ◽  
Author(s):  
K D Krori ◽  
J Barua
Keyword(s):  
General Relativity ◽  
Fluid Sphere ◽  
Free Solution ◽  
Charged Fluid ◽  
Charged Fluid Sphere
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