Results 51 to 60 of about 71,531 (348)

Gravitational lens on de Sitter background

Physical Review D, 2022
Gravitational lenses are examined in de-Sitter (dS) background, for which the existence of the dS horizon is taken into account and hyperbolic trigonometry is used together with the hyperbolic angular diameter distance. Spherical trigonometry is used to discuss a gravitational lens in anti-de Sitter (AdS) background.
Keita Takizawa, Hideki Asada
openaire   +2 more sources

Scrambling‐Enhanced Quantum Battery Charging in Black Hole Analogues

Advanced Science, EarlyView.
By employing a black‐hole‐analog quantum battery constructed from a position‐dependent XY model, its dynamical behavior is investigated through a quench of the scrambling parameter. It is systematically quantified that how the simulated scrambling improves key performance metrics‐namely, stored energy, peak power, and charging time‐thereby offering a ...
Zhilong Liu, Ying Li, Zehua Tian, Jieci Wang   +3 more
wiley   +1 more source

Perturbative Approach to the Gravitational Lensing by a Non-spherically Distorted Compact Object

, 2011
We investigate the gravitational lens effect caused by a non-spherically distorted compact object. The non-spherical property of the gravitational potential is modeled by a quadrupole moment. Under the assumption that the quadrupole contribution is small,
Alard, Alard, Alard, Amano Saijo, Asada, Asada, Asada, Baraldo, Ebina, Ibanez, Konno, Mao, Masumi Kasai, Sari, Schneider   +14 more
core   +1 more source

Evaporation‐Driven Solutal Marangoni Control of Rayleigh–Taylor Instability in Inverted Films

Advanced Science, EarlyView.
ABSTRACT Inverted liquid films are inherently unstable: gravity amplifies perturbations through the Rayleigh–Taylor instability (RTI), causing rupture and dripping. We show that selective evaporation in volatile binary mixtures can suppress, delay, or transform this instability by inducing solutal Marangoni stresses.
Minwoo Choi, Hyejoon Jun, Hyoungsoo Kim
wiley   +1 more source

IMAGES DISTRIBUTION OF BINARY SYMMETRICAL GRAVITATIONAL LENS

Odessa Astronomical Publications, 2019
In this paper, we study the distribu- tion of images from a point source in N - point gravi- tational lenses. It is well known that in a Schwarzschild lens (N = 1) from a point source, there are always two images.
A. T. Kotvytskiy, S. D. Bronza, V. Yu. Shablenko   +2 more
doaj   +1 more source

The strong gravitational lens finding challenge [PDF]

Astronomy & Astrophysics, 2019
Large-scale imaging surveys will increase the number of galaxy-scale strong lensing candidates by maybe three orders of magnitudes beyond the number known today. Finding these rare objects will require picking them out of at least tens of millions of images, and deriving scientific results from them will require quantifying the efficiency and bias of ...
Metcalf, R. Benton, Meneghetti, M., Avestruz, Camille, Bellagamba, Fabio, Bom, Clécio R., Bertin, Emmanuel, Cabanac, Rémi, Courbin, F., Davies, Andrew, Decencière, Etienne, Flamary, Rémi, Gavazzi, Raphael, Geiger, Mario, Hartley, Philippa, Huertas-Company, Marc, Jackson, Neal, Jacobs, C., Jullo, Eric, Kneib, Jean-Paul, Koopmans, Léon V.E., Lanusse, François, Li, Chun-Liang, Ma, Quanbin, Makler, Martin, Li, Nan, Lightman, Matthew, Petrillo, Carlo Enrico, Serjeant, Stephen, Schäfer, Christoph, Sonnenfeld, Alessandro, Tagore, Amit, Tortora, Crescenzo, Tuccillo, Diego, Valentín, Manuel B., Velasco-Forero, Santiago, Verdoes Kleijn, Gijs A., Vernardos, Georgios   +36 more
openaire   +7 more sources

Analysis of Multiscale Condensation Phenomena Using a Zero‐Shot Computer Vision Framework

Advanced Science, EarlyView.
A zero‐shot computer vision framework quantifies multiscale condensation dynamics by automatically segmenting droplets and extracting physical parameters without labeled data. The workflow integrates data mining and statistical analysis to reveal droplet growth, coalescence statistics, and sweeping behaviors, enabling label‐free measurement of heat ...
Donghyeong Lee, Seokwan Roh, Jaewoo Jeong, Kuk‐Jin Yoon, Jungchul Lee, Youngsuk Nam   +5 more
wiley   +1 more source

QUASI-ANALYTICAL METHOD FOR IMAGES CONSTRUCTION FROM GRAVITATIONAL LENSES

Odessa Astronomical Publications, 2016
One of the main problems in the study of system of equations of the gravitational lens, is the computation of coordinates from the known position of the source. In the process of computing finds the solution of equations with two unknowns. The problem is
A. T. Kotvytskiy, S. D. Bronza
doaj   +1 more source

The first direct detection of a gravitational micro-lens toward the Galactic bulge

, 2007
We present a direct detection of the gravitational lens that caused the microlensing event MACHO-95-BLG-37. This is the first fully resolved microlensing system involving a source in the Galactic bulge, and the second such system in general. The lens and
A. Wood, Baraffe I., Bessell M. S., Chang K., Kozlowski S., P. R. Woźniak, Perryman M. A. C., S. Kozłowski, S. Mao, Udalski A., Wozniak P.   +10 more
core   +1 more source

LensMEM: A Gravitational Lens Inversion Algorithm Using the Maximum Entropy Method [PDF]

, 1995
We present a new algorithm for inverting poorly resolved gravitational lens systems using the maximum entropy method (MEM). We test the method with simulations and then apply it to an 8 GHz VLA map of the radio ring lens MG1654+134.
Kochanek, C. S., Narayan, R., Wallington, S.   +2 more
core   +2 more sources