Results 51 to 60 of about 123,706 (259)
Advanced Science, EarlyView.An ionic liquid‐based shear‐thickening fluid (ILSTF) exhibits lubricated dynamics from strong shear thickening to impact‐triggered jamming. A persistent nanometric solvation layer around silica governs both the shear thickening saturation in rheology and jamming front propagation under dynamic impact compression.
Yiran Wu +6 more
wiley +1 more source
Gravitational collapse and formation of regular black holes: Dymnikova, Hayward, and beyond
European Physical Journal C: Particles and FieldsThe gravitational collapse of a star can lead to the formation of a regular black hole. However, a key factor in this process is the transition of ordinary baryonic matter into a substance that forms the de Sitter core.
Vitalii Vertogradov
doaj +1 more source
Cylindrical Collapse and Gravitational Waves
, 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.
core +2 more sources
Inferring the core-collapse supernova explosion mechanism with three-dimensional gravitational-wave simulations [PDF]
, 2017 A detection of a core-collapse supernova signal with an Advanced LIGO and Virgo gravitational-wave detector network will allow us to measure astrophysical parameters of the source.
Heng, Ik Siong +2 more
core +2 more sources
Quantum vacuum effects on the formation of black holes
Journal of High Energy Physics, 2023 We study the backreaction of quantum fields induced through the vacuum polarization and the conformal anomaly on the collapse of a thin shell of dust. It is shown that the final fate of the collapse process depends on the physical properties of the shell,
Moslem Shafiee, Yousef Bahrampour
doaj +1 more source
Gravitational Collapse in Gravity's Rainbow
, 2015 In this paper, we will analyze the gravitational collapse in the framework of gravity's rainbow. We will demonstrate that the position of the horizon for a particle inside the black hole depends on the energy of that particle.
Ali, Ahmed Farag +3 more
core +1 more source
Shearfree cylindrical gravitational collapse
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 ...
di Prisco, A. +3 more
openaire +2 more sources
Light‑Driven Propulsion of Graphene Aerogels in Microgravity
Advanced Science, EarlyView.Ultralight graphene aerogels convert laser light into thrust. Parabolic‐flight experiments directly compare their motion in microgravity and at 1 g, revealing order‐of‐magnitude enhancements in distance, velocity, and transient thrust when weight and friction are removed (∼50 times enhancement).
Omnia Khattab +10 more
wiley +1 more source
Matter and gravitons in the gravitational collapse
Physics Letters B, 2016 We consider the effects of gravitons in the collapse of baryonic matter that forms a black hole. We first note that the effective number of (soft off-shell) gravitons that account for the (negative) Newtonian potential energy generated by the baryons is ...
Roberto Casadio +2 more
doaj +1 more source
Charged anisotropic spherical collapse with heat flow
European Physical Journal C: Particles and Fields, 2021 In this article, we study the shear-free gravitational collapse of a charged radiating star. The Einstein field equations of gravitational collapse for the charged stars are known to give rise to a high degree of non-linearity in the ordinary ...
Kali Charan +2 more
doaj +1 more source