scholarly journals Melvin's "magnetic universe", the role of the magnetic tension and the implications for gravitational collapse

2021 ◽  
Author(s):  
Christos G Tsagas ◽  
Panagiotis Mavrogiannis
Keyword(s):  
Gravitational Collapse ◽  
Magnetic Tension

scholarly journals On the role of the H2ortho:para ratio in gravitational collapse during star formation

2014 ◽  
Vol 563 ◽  
pp. A85 ◽  
Author(s):  
Neil Vaytet ◽  
Kengo Tomida ◽  
Gilles Chabrier
Keyword(s):  
Star Formation ◽  
Gravitational Collapse

Tolman mass of spherical fluids with electromagnetic field

2019 ◽  
Vol 34 (02) ◽  
pp. 1950012 ◽  
Author(s):  
M. Z. Bhatti ◽  
Z. Yousaf ◽  
A. Yousaf
Keyword(s):  
Gravitational Collapse ◽  
Mass Function ◽  
Physical Factors ◽  
Field Equations ◽  
Density Inhomogeneity ◽  
Local Anisotropy ◽  
Anisotropic Matter ◽  
Weyl Curvature Tensor ◽  
The Impact

Assuming a system with spherical symmetry in f(R) gravity filled with dissipative charged and anisotropic matter, we study the impact of density inhomogeneity and local anisotropy on the gravitational collapse in the presence of charge. For this purpose, we evaluated the modified Maxwell field equations, Weyl curvature tensor, and the mass function. Using Misner–Sharp mass formalism, we construct a relation between the Weyl tensor, density inhomogeneity, and local anisotropy. Specifically, we obtain the expression of modified Tolman mass which helps to analyze the influence of charge and dark source terms on different physical factors, also it helps to study the role of these factors on gravitational collapse.

The role of neutrino dissipation in gravitational collapse

1979 ◽  
Vol 232 ◽  
pp. L101 ◽  
Author(s):  
L. Lindblom ◽  
S. Detweiler
Keyword(s):  
Gravitational Collapse

A MODEL OF QUANTUM GRAVITATIONAL COLLAPSE

1991 ◽  
Vol 06 (15) ◽  
pp. 2693-2706 ◽  
Author(s):  
J. GREENSITE
Keyword(s):  
Quantum Mechanics ◽  
Scalar Field ◽  
Gravitational Collapse ◽  
Scale Factor ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
Intrinsic Time ◽  
Infinite Range ◽  
Metric Scale

Some issues in the quantum mechanics of gravitational collapse are discussed in the framework of a simple minisuperspace model, consisting of a Friedman metric coupled to a massless scalar field. The model illustrates the role of intrinsic time coordinates in parametrizing gravitational collapse through a singularity, and the relevance of quantizing the metric scale factor over an infinite, rather than half-infinite, range.

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