Results 11 to 20 of about 5,239 (155)
Nature, 1964 With the exception of a few supernova remnants which are in our galaxy, most cosmic radio sources are “radio galaxies”. Although flare stars do emit radio waves occasionally, no ordinary stars with strong, steady radio emission have been found. The typical optical power of stars is from 1030 ergs/sec (white dwarfs) to 1038 ergs/sec (super giants).
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Gravitational collapse: expanding and collapsing regions [PDF]
General Relativity and Gravitation, 2010 12 pages, 4 figures, accepted for publication in Gen.
Sharif, M., Abbas, G.
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SPHERICALLY SYMMETRIC GRAVITATIONAL COLLAPSE [PDF]
Modern Physics Letters A, 2009 In this paper, we discuss gravitational collapse of spherically symmetric spacetimes. We derive a general formalism by taking two arbitrary spherically symmetric spacetimes with g00 = 1. Israel's junction conditions are used to develop this formalism. The formulas for extrinsic curvature tensor are obtained.
Sharif, M., Iqbal, Khadija
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PLANE SYMMETRIC GRAVITATIONAL COLLAPSE [PDF]
International Journal of Modern Physics A, 2008 In this paper, we derive the general formulation by considering two arbitrary plane symmetric space–times using Israel's method. As an example, we apply this formulation to known plane symmetric space–times. We take the Taub's static metric in the interior region whereas Kasner's nonstatic metric in the exterior region.
Sharif, M., Ahmad, Zahid
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Gravitational Collapse of Colloidal Gels [PDF]
Physical Review Letters, 2005 We present a unified framework for understanding the compaction of colloidal gels under their own weight. The dynamics of the collapse are determined by the value of the gravitational stress sigma(g), as compared to the yield stress sigma(Y) of the network. For sigma(g)sigma(Y), the network eventually yields, leading to rapid settling.
Manley, S. +3 more
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GRAVITATIONAL COLLAPSE OF STARS AND THE METHODS OF ITS OBSERVATIONS
Odessa Astronomical Publications, 2016 It is present a review of the models of the later stages of stellar evolution and the mechanisms of the generation of neutrinos, charged particles and electromagnetic radiation during the gravitational collapse of stars.
V. G. Kryvdyk
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Vaidya spacetime for Galileon gravity's rainbow
Nuclear Physics B, 2016 In this paper, we analyze Vaidya spacetime with an energy dependent metric in Galileon gravity's rainbow. This will be done using the rainbow functions which are motivated from the results obtained in loop quantum gravity approach and noncommutative ...
Prabir Rudra +2 more
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Gravitational phase transitions and instabilities of self-gravitating fermions in general relativity
Physics Letters B, 2020 We discuss the occurrence of gravitational phase transitions and instabilities in a gas of self-gravitating fermions within the framework of general relativity.
Pierre-Henri Chavanis, Giuseppe Alberti
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Dynamo effects in gravity [PDF]
E3S Web of Conferences, 2019 Nonlinear oscillations in the dynamic system of gravitational and material fields are considered. The problems of singularities and caustics in gravity, expansion and baryon asymmetry of the Universe, wave prohibition of collapse into black holes, and ...
Shevtsov Boris
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Causal structure of singularity in non-spherical gravitational collapse
European Physical Journal C: Particles and Fields, 2022 We investigate here the final state of gravitational collapse of a non-spherical and non-marginally bound dust cloud as modeled by the Szekeres spacetime.
Dipanjan Dey +3 more
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