Results 151 to 160 of about 135,378 (342)

Strong field gravitational lensing in scalar tensor theories

, 2006
Strong field gravitational lensing in the Brans-Dicke theory has been studied. The deflection angle for photons passing very close to the photon sphere is estimated for the static spherically symmetric space-time of the theory and the position and ...
Arunava Bhadra, Bardas B, Bhadra A, Bhadra A Sarkar K Datta D P Nandi K K, Damour T, Danzmann K, Darwin C, Eiroa E F, Joshi P S, Kabita Sarkar, Larranaga Rubio E A, Luminet J P, Murphy T W, Richstone D, Turyshev S G, Turyshev S G Shao M Nordtvedt K L, Turyshev S G Shao M Nordtvedt K L, Will C M   +17 more
core   +2 more sources

Gravitational Lenses and Cosmological Evolution [PDF]

Symposium - International Astronomical Union, 1982
Empirical descriptions of cosmological evolution rely on an assumed relation between luminosity distance and redshift in order to derive the luminosity function and its epoch dependence. This relation is usually taken to be that of an idealised Friedmann cosmology, despite the obvious abundance of small-scale structure in the Universe.
openaire   +4 more sources

Lacustrine and fan‐delta sediments in syn‐rift lake basins

The Depositional Record, EarlyView.
A consistent model for the sequence framework and depositional pattern of asymmetric half‐grabens in syn‐rift lake basins bounded by active faults has been established, complementing existing models for marine rift successions. Syn‐rift lake basins are characterised by relatively small dimensions, steep slopes, poorly developed shoreline strata ...
Qianyou Wang, Yaohua Li, Hamed Sanei, Joe Gardner, Arka Rudra, James E. P. Utley, Richard H. Worden   +6 more
wiley   +1 more source

On the Possibility of Determining Hubble's Parameter and the Masses of Galaxies from the Gravitational Lens Effect [PDF]

, 1964
S. Refsdal
openalex   +1 more source

Wave optics and image formation in gravitational lensing [PDF]

arXiv, 2012
We discuss image formation in gravitational lensing systems using wave optics. Applying the Fresnel-Kirchhoff diffraction formula to waves scattered by a gravitational potential of a lens object, we demonstrate how images of source objects are obtained directly from wave functions without using a lens equation for gravitational lensing.
arxiv  

Advancements in liquid marbles as an open microfluidic platform: Rapid formation, robust manipulation, and revolutionary applications

Droplet, EarlyView.
A sessile LM‐shaped microdroplet system, featuring by three logical internal layers that represent rapid formation, robust manipulation, and revolutionary applications respectively. Abstract Liquid marbles (LMs) have become a focal point in microfluidics for their efficient manipulation of small liquid volumes.
Tong Tong, Huaiqing Hu, Yuanhao Xie, Jing Jin   +3 more
wiley   +1 more source

Using Convolutional Neural Networks to Search for Strongly Lensed Quasars in KiDS DR5

The Astrophysical Journal
Gravitationally strongly lensed quasars (SL-QSO) offer invaluable insights into cosmological and astrophysical phenomena. With the data from ongoing and next-generation surveys, thousands of SL-QSO systems can be discovered expectedly, leading to ...
Zizhao He, Rui Li, Yiping Shu, Crescenzo Tortora, Xinzhong Er, Raoul Cañameras, Stefan Schuldt, Nicola R. Napolitano, Bharath Chowdhary N, Qihang Chen, Nan Li, Haicheng Feng, Limeng Deng, Guoliang Li, L. V. E. Koopmans, Andrej Dvornik   +15 more
doaj   +1 more source

3C 268.4 -- Evidence for the Presence of a Gravitationally-Lensed Secondary Image [PDF]

, 1976
N. Sanitt
openalex   +1 more source

Fog collection with hairy wires

Droplet, EarlyView.
A hairy wire can perform a steady‐state water collection rate that is more than 2.5 times as high as a smooth cylindrical metal wire of the same size, due to the efficient fog deposition and drainage enabled by its dual scale structure. The fog collection rate in the figure is normalized to that of the metal wire.
Leyun Feng, Wonjae Choi, Kyoo‐Chul Park   +2 more
wiley   +1 more source

Weak lensing of the CMB

, 2009
The cosmic microwave background (CMB) represents a unique source for the study of gravitational lensing. It is extended across the entire sky, partially polarized, located at the extreme distance of z=1100, and is thought to have the simple, underlying ...
Challinor, Anthony, Hanson, Duncan, Lewis, Antony   +2 more
core   +1 more source