Results 21 to 30 of about 1,462 (252)
Testing Velocity-field Lensing on IllustrisTNG Galaxies
The Astrophysical Journal, 2023 Weak gravitational lensing shear could be measured far more precisely if information about unlensed attributes of source galaxies were available. Disk galaxy velocity fields supply such information, at least in principle, with idealized models predicting
Jean Donet, David Wittman
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Symposium - International Astronomical Union, 1993 In approximately half the systems currently recognized as strongly gravitationally lensed, the background object is an extragalactic radio source. Radio observations have played an important role in the identification of lensed systems, and the properties of radio sources allow some of the astrophysical applications of lensing to be realized.
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GRAVITATIONAL LENSING BY WORMHOLES [PDF]
Modern Physics Letters A, 2008 We have investigated the gravitational lensing by two wormholes, viz., Janis–Newman–Winnicour (JNW) wormhole and Ellis wormhole. The deflection angles in the strong field limit are calculated and various lens parameters of two wormholes are compared. It is shown that the JNW wormhole exhibits the relativistic images, while the Ellis wormhole does not ...
Dey, Tushar Kanti, Sen, Surajit
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Gravitational Lensing in Plasma [PDF]
Proceedings 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
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Aberration in gravitational lensing [PDF]
Physical Review D, 2008 It is known that a relative translational motion between the deflector and the observer affects gravitational lensing. In this paper, a lens equation is obtained to describe such effects on actual lensing observables. Results can be easily interpreted in terms of aberration of light-rays.
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Gravitational lensing in Weyl gravity [PDF]
Physical Review D, 2019 14 pages; v2: published ...
Oğuzhan Kaşıkçı, Cemsinan Deliduman
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Scholarpedia, 2017 Invited and refereed contribution to ...
Matthias Bartelmann, Matteo Maturi
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Evolving Morphology of Resolved Stellar Einstein Rings
The Astrophysical Journal, 2023 We consider strong gravitational lensing by nearby stars. Using our wave-optical treatment of lensing phenomena, we study Einstein rings that may form around nearby stellar lenses.
Slava G. Turyshev, Viktor T. Toth
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Weak Gravitational Lensing [PDF]
Proceedings of Frontiers of Fundamental Physics 14 — PoS(FFP14), 2008 In this brief review I consider the advances made in weak gravitational lensing over the last 8 years, concentrating on the large scales - cosmic shear. I outline the theoretical developments, observational status, and the challenges which cosmic shear must overcome to realise its full potential. Finally I consider the prospects for probing Dark Energy
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Advanced Functional Materials, EarlyView.Highly hydrophilic surfaces (water contact angle, ≈17.7°) exhibiting surprising water slipping performance (sliding angle, ≈7.3°) are successfully prepared via simple chemisorption of polyethylene glycol (PEG) organosilane and subsequent alkali‐treatment.
Hyeonjin Kim +5 more
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