Results 21 to 30 of about 181,041 (277)

Gravitational Lensing in Plasma [PDF]

open access: yesProceedings of 25th Texas Symposium on Relativistic Astrophysics — PoS(Texas 2010), 2011
We develop a model of gravitational lensing in plasma. We show that the gravitaional deflection angle by point mass in the homogeneous plasma differs from the vacuum deflection angle and depends on frequency of the photon. The dependence of the lensing angle on the photon frequency in the homogeneous plasma resembles the properties of a refractive ...
O. YU. TSUPKO, G. S. BISNOVATYI-KOGAN
openaire   +1 more source

Exploring gravitational lensing [PDF]

open access: yesEuropean Journal of Physics, 2019
Abstract In this article, we discuss the idea of gravitational lensing, from a systematic, historical and didactic point of view. We show how the basic lensing equation together with the concepts of geometrical optics opens a space of implications that can be explored along different dimensions.
Tilman Sauer, Tobias Schütz
openaire   +3 more sources

Rotation in gravitational lenses [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2006
Gravitational lensing deflects light. A single lens deflector can only shear images, but cannot induce rotations. Multiple lens planes can induce rotations. Such rotations can be observed in quadruply imaged sources, and can be used to distinguish between two proposed solutions of the flux anomaly problem: substructures in lensing galaxies vs large ...
Pen, Ue-Li, Mao, Shude
openaire   +2 more sources

Gravitational Lensing and Optical Geometry [PDF]

open access: yes, 2020
The year 2019 saw the centenary of Eddington's eclipse expeditions and the corroboration of Einstein's general relativity by gravitational lensing. To mark the occasion, a Special Issue of Universe has been dedicated to the theoretical aspects of strong ...

core   +1 more source

Toward an Optimal Reconstruction of the Shear Field with PDF-folding

open access: yesThe Astrophysical Journal, 2023
Weak lensing provides a direct way of mapping the density distribution in the Universe. To reconstruct the density field from the shear catalog, an important step is to build the shear field from the shear catalog, which can be quite nontrivial due to ...
Haoran Wang   +3 more
doaj   +1 more source

The intrinsic B-mode polarisation of the cosmic microwave background [PDF]

open access: yes, 2014
. We estimate the B-polarisation induced in the Cosmic Microwave Background by the non-linear evolution of density perturbations. Using the second-order Boltzmann code SONG, our analysis incorporates, for the first time, all physical effects at ...
Guido Pettinari (16190237)   +16 more
core   +3 more sources

The ‘Gravitational Lensing’ Bibliography [PDF]

open access: yesSymposium - International Astronomical Union, 1996
We present a non-exhaustive bibliography on “Gravitational Lensing” (GL), totalizing nearly 1500 titles (see Pospieszalska-Surdej et al. 1993 for an earlier version of this bibliography). It also includes recent abstracts of papers dealing with gravitational lensing and submitted to astro-ph@babbage.sissa.it. The GL bibliography is accessible through a
Pospieszalska-Surdej, Anna   +2 more
openaire   +2 more sources

Investigating gravitational lensing diffraction in the laboratory with structured light [PDF]

open access: yesEPJ Web of Conferences
We use spatial light modulation to investigate the diffractive effects of gravitational lensing in the laboratory. Using this new platform for laboratory astrophysics, we can overcome the coherence challenges that prevent the observation of diffraction ...
Galvez Enrique J.   +5 more
doaj   +1 more source

Gravitational lensing [PDF]

open access: yesClassical and Quantum Gravity, 2010
Invited review article to appear in Classical and Quantum Gravity, 85 pages, 15 ...
openaire   +2 more sources

Weak gravitational lensing [PDF]

open access: yesPhysics Reports, 2001
Review; 223 pages; figures embedded; to be submitted to Physics Reports; constructive comments are ...
Bartelmann, M., Schneider, P.
openaire   +3 more sources

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