Results 31 to 40 of about 49,845 (276)

Gravitational lensing and modified Newtonian dynamics [PDF]

, 2001
Gravitational lensing is most often used as a tool to investigate the distribution of (dark) matter in the universe, but, if the mass distribution is known a priori, it becomes, at least in principle, a powerful probe of gravity itself.
Daniel J. Mortlock, Edwin L. Turner, Tadros, Qin   +3 more
core   +8 more sources

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
doaj   +1 more source

Gravitational lensing by gravitational waves

, 2008
Gravitational lensing by gravitational wave is considered. We notice that although final and initial direction of photons coincide, displacement between final and initial trajectories occurs.
G. S. Bisnovatyi-Kogan, G. S. Bisnovatyi-Kogan, L. D. Landau, O. Yu. Tsupko, R. A. Saenz, V. B. Braginsky, V. Faraoni   +6 more
core   +1 more source

Gravitational Waveguides in Cosmology [PDF]

, 1996
We discuss the possibility that, besides the usual gravitational lensing, there may exist a sort of gravitational waveguiding in cosmology which could explain some anomalous phenomena which cannot be understood by the current gravitational lensing models
A A Marino, Arp H C, Bartelmann M, Blioh P V, Borgeest U, Capozziello, , Dodonov V V, Dodonov V V, Dodonov V V, Dodonov V V, G Marmo, Geller M J, Kaiser R, Kibble T W B, Kolb E W, Kormann R, Landau L D, Leontovich A M, Lifsits E M, Man'ko V I, Paczynski B, Peebles P J E, R de Ritis, Schneider P, Schneider P, Schneider P, Skrotsky G V, V Man'ko   +27 more
core   +2 more sources

Strong Deflection Gravitational Lensing for the Photons Coupled to the Weyl Tensor in a Conformal Gravity Black Hole

Universe, 2023
In the present paper, strong deflection gravitational lensing is studied in a conformal gravity black hole. With the help of geometric optics limits, we have formulated the light cone conditions for the photons coupled to the Weyl tensor in a conformal ...
Ghulam Abbas, Ali Övgün, Asif Mahmood, Muhammad Zubair   +3 more
doaj   +1 more source

Shadow and Weak Deflection Angle of a Black Hole in Nonlocal Gravity

Universe, 2022
Black hole shadow and gravitational lensing play important roles in testing gravitational theories in the strong field regime. As the first-order modifications from quantum gravity, the nonlocality can be manifested by black hole shadow and gravitational
Qi-Ming Fu, Shao-Wen Wei, Li Zhao, Yu-Xiao Liu, Xin Zhang   +4 more
doaj   +1 more source

Light deflection by Damour-Solodukhin wormholes and Gauss-Bonnet theorem

, 2018
In this paper, using the recent method proposed by Ono, Ishihara and Asada (OIA) who extend the idea of Gibbons and Werner to the stationary and axisymmetric case, we apply the Gauss-Bonnet theorem to the optical metric of the non-rotating and rotating ...
Övgün, Ali
core   +1 more source

Parallel 3D Bioprinting on SLIPS‐Microarrays

Advanced Functional Materials, EarlyView.
This work introduces the first truly parallel 3D bioprinting method, enabling both the simultaneous fabrication of hundreds of cell laden hydrogel 3D structures and their HTS in individual liquid compartments. By integrating Digital Light Processing (DLP) stereolithography with functional micropatterns, the platform decouples printing time from array ...
Julius von Padberg, Julian A. Serna, Maike Schliephake, Pavel A. Levkin   +3 more
wiley   +1 more source

Strong Gravitational-wave Lensing Posterior Odds

The Astrophysical Journal
Like light, gravitational waves are gravitationally lensed by intervening massive astrophysical objects—such as galaxies, clusters, black holes, and stars—resulting in a variety of potentially observable gravitational-wave lensing signatures.
Otto A. Hannuksela, K. Haris, Justin Janquart, Harsh Narola, Hemantakumar Phurailatpam, Jolien D. E. Creighton, Chris Van Den Broeck   +6 more
doaj   +1 more source

Einstein beams and the diffractive aspect of gravitationally-lensed light

New Journal of Physics, 2023
The study of light lensed by cosmic matter has yielded much information about astrophysical questions. Observations are explained using geometrical optics following a ray-based description of light.
V Rodríguez-Fajardo, T P Nguyen, K S Hocek, J M Freedman, E J Galvez   +4 more
doaj   +1 more source