Results 51 to 60 of about 2,953 (244)
Gravitational lensing from a spacetime perspective. [PDF]
, 2004 The theory of gravitational lensing is reviewed from a spacetime perspective, without quasi-Newtonian approximations. More precisely, the review covers all aspects of gravitational lensing where light propagation is described in terms of lightlike ...
Volker Perlick +2 more
core
Modeling the Impacts of Galaxy Intrinsic Alignments on Weak Lensing Peak Statistics
The Astrophysical JournalWeak gravitational lensing (WL) peak statistics capture cosmic nonlinear structures and can provide additional cosmological information complementary to cosmic shear two-point correlation analyses.
Tianyu Zhang +7 more
doaj +1 more source
Gravitational lensing by a black-bounce-Reissner–Nordström spacetime
European Physical Journal C: Particles and Fields, 2022 We investigate the weak and strong deflection gravitational lensing by a black-bounce-Reissner–Nordström spacetime and obtain their lensing observables. Assuming the supermassive black holes in the Galactic Center and at the center of M87, Sgr A* and M87*
Jing Zhang, Yi Xie
doaj +1 more source
Complexity Analysis of Bubble Plumes in Power Law Fluids Based on Chaos Theory
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT In order to reveal the complexity of the internal flow of bubble plume in power law fluid, the flow characteristics and chaotic characteristics of plume are studied by experiment and theory. The chaotic characteristic parameters (correlation dimension D, K entropy, and Lyapunov exponent λ) of gas velocity under different superficial gas ...
Xin Dong +6 more
wiley +1 more source
Weak Gravitational Lensing Bispectrum
The Astrophysical Journal, 2001 Weak gravitational lensing observations probe the spectrum and evolution of density fluctuations and the cosmological parameters which govern them. The non-linear evolution of large scale structure produces a non-Gaussian signal which is potentially observable in galaxy shear data.
Cooray, Asantha, Hu, Wayne
openaire +2 more sources
Weak lensing: applications in gravitational wave and galaxy cluster cosmology [PDF]
Radiation travelling through the Universe is weakly lensed by Large Scale Structure. Measurements of this effect are a valuable probe of the content and dynamics of the Universe.
Mpetha, Charlie Tupman
core +1 more source
Weak-lensing Approximation of Wave-optics Effects from General Symmetric Lens Profiles
The Astrophysical JournalGravitational lensing of electromagnetic (EM) waves has yielded many profound discoveries across fundamental physics, astronomy, astrophysics, and cosmology. Similar to EM waves, gravitational waves (GWs) can also be lensed.
Zhao-Feng Wu +3 more
doaj +1 more source
British Educational Research Journal, EarlyView.Abstract As front‐line observers and active participants in pupils' daily lives, teachers closely monitor pupils' social interactions, emotional states and behavioural changes. Their unique perspective enables them to detect problems in the social lives of their pupils that may not be immediately visible to peers, parents or mental health professionals.
Yixuan Zheng +4 more
wiley +1 more source
British Educational Research Journal, EarlyView.Abstract Curriculum decolonisation has become a prominent feature of equity agendas in UK higher education, yet there remains limited empirical and theoretical work on how such initiatives are evaluated, particularly within business schools. This paper presents one of the first multi‐institutional empirical studies examining how UK business schools ...
Sally Everett +2 more
wiley +1 more source