Gravitational collapse in General Relativity and in R2-gravity: A comparative study [PDF]
International Journal of Geometric Methods in Modern Physics (IJGMMP), 2018 We compare the gravitational collapse of homogeneous perfect fluid with various equations of state in the framework of General Relativity and in [Formula: see text] gravity. We make our calculations using dimensionless time with characteristic timescale [
A. Astashenok +3 more
semanticscholar +1 more source
The nature of the naked singularity in generalized Vaidya spacetime and white hole geodesics
Physics of Complex Systems, 2021 This paper gives conditions to the energy-momentum tensor when the gravitational collapse of generalized Vaidya spacetime results in a naked singularity.
Виталий Дмитриевич Вертоградов
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Gravitational Wave Speed: Undefined. Experiments Proposed [PDF]
Research Ideas and Outcomes, 2018 Since changes in all 4 dimensions of spacetime are components of displacement for gravitational waves, a theoretical result is presented that their speed is undefined, and that the Theory of Relativity is not reliable to predict their speed ...
Daniel Russell
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Evidence for the formation of comet 67P/Churyumov-Gerasimenko through gravitational collapse of a bound clump of pebbles [PDF]
, 2017 The processes that led to the formation of the planetary bodies in the Solar system are still not fully understood. Using the results obtained with the comprehensive suite of instruments onboard the European Space Agency's Rosetta mission, we present ...
J. Blum +21 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
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
semanticscholar +1 more source
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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Anti-deSitter gravitational collapse [PDF]
, 2002 We describe a formalism for studying spherically symmetric collapse of the massless scalar field in any spacetime dimension, and for any value of the cosmological constant $\Lambda$.
Birukou, M. +3 more
core +2 more sources
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 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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