Results 31 to 40 of about 632,753 (317)
Gravitational Collapse in Quantum Einstein Gravity [PDF]
Foundations of physics, 2017 The existence of spacetime singularities is one of the biggest problems of nowadays physics. According to Penrose, each physical singularity should be covered by a “cosmic censor” which prevents any external observer from perceiving their existence ...
A. Bonanno +2 more
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Scale-free gravitational collapse as the origin of ρ ∼ r -2 density profile - a possible role of turbulence in regulating gravitational collapse [PDF]
, 2018 Astrophysical systems, such as clumps that form star clusters share a density profile that is close to rho similar to r(-2). We prove analytically this density profile is the result of the scale-free nature of the gravitational collapse.
Guangxing Li
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Gravitational collapse of quantum fields and Choptuik scaling
Journal of High Energy Physics, 2022 Gravitational collapse into a black hole has been extensively studied with classical sources. We develop a new formalism to simulate quantum fields forming a black hole.
Benjamin Berczi +2 more
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Continued Gravitational Collapse for Newtonian Stars [PDF]
Archive for Rational Mechanics and Analysis, 2018 The classical model of an isolated selfgravitating gaseous star is given by the Euler–Poisson system with a polytropic pressure law $$P(\rho )=\rho ^\gamma $$ P ( ρ ) = ρ γ , $$\gamma >1$$ γ > 1 .
Yan Guo, Mahir Hadžić, J. Jang
semanticscholar +1 more source
On the Induced Gravitational Collapse
EPJ Web of Conferences, 2018 The induced gravitational collapse (IGC) paradigm has been applied to explain the long gamma ray burst (GRB) associated with type Ic supernova, and recently the Xray flashes (XRFs).
M. Becerra Laura +4 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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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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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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A conjectured upper bound on the Choptuik critical exponents
Nuclear Physics B, 2021 Near-critical type II gravitational collapse is characterized by the formation of arbitrarily small black holes whose horizon radii are described by the simple scaling law rBH∝(p−p⁎)γ, where γ is the matter-dependent Choptuik critical exponent and Δp≡p−p⁎
Shahar Hod
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