Results 61 to 70 of about 67,033 (286)

Weak gravitational lensing by multi-horizons black hole

Europhysics letters
We investigate the weak gravitational lensing caused by multi-horizon black hole (MHBH) on light. Using the Gauss-Bonnet theorem, which demonstrates that light bending is a topological and global phenomenon, we are able to deduce the deflection angle of ...
Farzan Mushtaq, Tiecheng Xia, M. Yasir, Aitazaz Ahsan   +3 more
semanticscholar   +1 more source

Morphology of CMB fields—effect of weak gravitational lensing [PDF]

Journal of Cosmology and Astroparticle Physics, 2019
We study the morphology of the cosmic microwave background temperature and polarization fields using the shape and alignment parameters, β and α, that are constructed from the contour Minkowski tensor.
Priya Goyal, P. Chingangbam, S. Appleby
semanticscholar   +1 more source

A synthetic Roman Space Telescope High-Latitude Imaging Survey: simulation suite and the impact of wavefront errors on weak gravitational lensing [PDF]

Monthly notices of the Royal Astronomical Society, 2019
The Nancy Grace Roman Space Telescope (Roman) mission is expected to launch in the mid-2020s. Its weak lensing program is designed to enable unprecedented systematics control in photometric measurements, including shear recovery, point spread function (
M. Troxel, H. Long, C. Hirata, A. Choi, M. Jarvis, R. Mandelbaum, K. Wang, M. Yamamoto, S. Hemmati, P. Capak, P. Capak   +10 more
semanticscholar   +1 more source

Weak deflection gravitational lensing for photons coupled to Weyl tensor in a Schwarzschild black hole

European Physical Journal C: Particles and Fields, 2018
Beyond the Einstein–Maxwell model, electromagnetic field might couple with gravitational field through the Weyl tensor. In order to provide one of the missing puzzles of the whole physical picture, we investigate weak deflection lensing for photons ...
Wei-Guang Cao, Yi Xie
doaj   +1 more source

Multi‐Soliton Microcombs Enable Ultrafast Nanometric‐Precision Ranging and Photon‐Level Detection

Advanced Science, EarlyView.
Our work first demonstrates dual‐multi‐soliton ranging and confirms its multifunctional capability. The method achieves ultrafast and nanometric‐precision measurement. For practical applications, we further extend the multi‐soliton states to photon‐level ranging.
Jiawen Zhi, Xiaoyang Guo, Xusheng Yang, Brent E. Little, Sai T. Chu, Chenggang Shao, Mengyu Wang, Yan Liang, Peng Xie, Weiqiang Wang, Hanzhong Wu   +10 more
wiley   +1 more source

Biased Dark Energy Constraints from Neglecting Reduced Shear in Weak Lensing Surveys [PDF]

, 2008
The weak gravitational lensing of distant galaxies by large-scale structure is expected to become a powerful probe of dark energy. By measuring the ellipticities of large numbers of background galaxies, the subtle gravitational distortion called "cosmic ...
Shapiro, Charles
core   +2 more sources

Studying galaxy troughs and ridges using weak gravitational lensing with the Kilo-Degree Survey [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We study projected underdensities in the cosmic galaxy density field known as 'troughs', and their overdense counterparts, which we call 'ridges'. We identify these regions using a bright sample of foreground galaxies from the photometric Kilo-Degree ...
M. Brouwer, V. Demchenko, J. Harnois-D'eraps, Maciej Bilicki, C. Heymans, H. Hoekstra, K. Kuijken, M. Alpaslan, S. Brough, Yan-Chuan Cai, M. Costa-Duarte, A. Dvornik, T. Erben, H. Hildebrandt, B. Holwerda, P. Schneider, C. Sifón, E. van Uitert   +17 more
semanticscholar   +1 more source

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

Gravitational lensing phenomena of Ellis-Bronnikov-Morris-Thorne wormhole with global monopole and cosmic string

Physics Letters B
In this paper, we theoretically investigate gravitational lensing within the space-time framework of traversable wormholes, focusing on the combined effects of a global monopole and a cosmic string.
Faizuddin Ahmed, İzzet Sakallı, Ahmad Al-Badawi   +2 more
doaj   +1 more source

Phytoplankton Tune Local pH to Actively Modulate Circadian Gravitactic Behavior

Advanced Physics Research, EarlyView.
Diel vertical migration hides an unexpected twist: Phytoplankton quietly engineer their local pH landscape, splitting into behaviorally distinct sub‐groups which stay separated even in identical conditions. Circadian pH changes, occuring over the course of a day, reshape their gravitactic behavior and physiological functions in ways scientists have ...
Arkajyoti Ghoshal, Soumitree Mishra, Jayabrata Dhar, Hans‐Peter Grossart, Anupam Sengupta   +4 more
wiley   +1 more source