Results 11 to 20 of about 745,401 (375)
ON GRAVITATIONAL COLLAPSE [PDF]
, 2017 : Gravitational collapse of diffuse material has been investigated using a new solution of Einstein's equations of general relativity. This replaces the theory of black-hole formation developed for the standard vacuum solution of Schwarzschild.
WAYTE, RICHARD
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Quantizing Gravitational Collapse [PDF]
Quantum Theory and Symmetries, 2004 I summarize some results obtained from a canonical quantization of gravitational collapse. The quantization is carried out in Kuchar variables on the LeMaitre-Tolman-Bondi family of spacetimes.
Vaz, Cenalo
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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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Energy Estimates and Gravitational Collapse [PDF]
Communications in Mathematical Physics, 2011 We study the cancelations in the energy estimates for Einstein vacuum equations in order to prove the formation of black holes along evolutions. The novelty of the paper is that, we completely avoid using rotation vector fields to establish the global ...
Pin Yu, R. Penrose
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Cylindrical Collapse and Gravitational Waves [PDF]
Classical and Quantum Gravity, 2005 We study the matching conditions for a collapsing anisotropic cylindrical perfect fluid, and we show that its radial pressure is non zero on the surface of the cylinder and proportional to the time dependent part of the field produced by the collapsing ...
Herrera, L., Santos, N. O.
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Shearfree cylindrical gravitational collapse [PDF]
Physical Review D, 2009 We consider diagonal cylindrically symmetric metrics, with an interior representing a general non-rotating fluid with anisotropic pressures. An exterior vacuum Einstein-Rosen spacetime is matched to this using Darmois matching conditions. We show that the matching conditions can be explicitly solved for the boundary values of metric components and ...
A. Di Prisco +3 more
openalex +3 more sources
Detecting and reconstructing gravitational waves from the next galactic core-collapse supernova in the advanced detector era [PDF]
Physical Review D, 2021 We performed a detailed analysis of the detectability of a wide range of gravitational waves derived from core-collapse supernova simulations using gravitational-wave detector noise scaled to the sensitivity of the upcoming fourth and fifth observing ...
M. Szczepańczyk +19 more
semanticscholar +1 more source
Turbulence Regulates the Rate of Planetesimal Formation via Gravitational Collapse [PDF]
Astrophysical Journal, 2020 We study how the interaction between the streaming instability (SI) and intrinsic gas-phase turbulence affects planetesimal formation via gravitational collapse in protoplanetary disks.
D. Gole +4 more
semanticscholar +1 more source
Requirements for Gravitational Collapse in Planetesimal Formation—The Impact of Scales Set by Kelvin–Helmholtz and Nonlinear Streaming Instability [PDF]
Astrophysical Journal, 2020 The formation of planetesimals is a challenging problem in planet formation theory. A prominent scenario for overcoming dust growth barriers is the gravitational collapse of locally over-dense regions, shown to robustly produce ∼100 km–sized objects ...
Konstantin Gerbig +3 more
semanticscholar +1 more source
Equilibrium, radial stability and non-adiabatic gravitational collapse of anisotropic neutron stars [PDF]
The European Physical Journal C, 2020 In this work we construct families of anisotropic neutron stars for an equation of state compatible with the constraints of the gravitational-wave event GW170817 and for four anisotropy ansatze.
J. M. Pretel
semanticscholar +1 more source