Results 51 to 60 of about 30,456 (275)

Baryons, neutrinos, feedback and weak gravitational lensing [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
(Abridged) The effect of baryonic feedback on the dark matter mass distribution is generally considered to be a nuisance to weak gravitational lensing. Measurements of cosmological parameters are affected as feedback alters the cosmic shear signal on angular scales smaller than a few arcminutes.
J. Harnois-Deraps, L. van Waerbeke, M. Viola, C. Heymans   +3 more
openaire   +3 more sources

Gravitational lensing by a black-bounce-Reissner–Nordström spacetime

European Physical Journal C: Particles and Fields, 2022
We investigate the weak and strong deflection gravitational lensing by a black-bounce-Reissner–Nordström spacetime and obtain their lensing observables. Assuming the supermassive black holes in the Galactic Center and at the center of M87, Sgr A* and M87*
Jing Zhang, Yi Xie
doaj   +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

Cluster Weak Gravitational Lensing

International School of Physics “Enrico Fermi”, 2010
Weak gravitational lensing of background galaxies is a unique, direct probe of the distribution of matter in clusters of galaxies. We review several important aspects of cluster weak gravitational lensing together with recent advances in weak lensing techniques for measuring cluster lensing profiles and constraining cluster structure parameters.
openaire   +2 more sources

Weak Gravitational Lensing and Its Cosmological Applications [PDF]

Annual Review of Nuclear and Particle Science, 2008
Weak gravitational lensing is a unique probe of the dark side of the universe: It provides a direct way to map the distribution of dark matter around galaxies and clusters of galaxies as well as on cosmological scales. Furthermore, the measurement of the weak lensing–induced distortions of the shapes of distant galaxies is a potentially powerful probe
Hoekstra, Henk, Jain, Bhuvnesh
openaire   +2 more sources

Statistics of Weak Lensing at Small Angular Scales: Analytical Predictions for Lower Order Moments [PDF]

, 1999
Weak lensing surveys are expected to provide direct measurements of the statistics of the projected dark matter distribution. Most analytical studies of weak lensing statistics have been limited to quasilinear scales as they relied on perturbative ...
Babul, Balian, Bartelmann, Bartelmann, Bernardeau, Bernardeau, Bernardeau, Bernardeau, Bernardeau, Bhuvnesh Jain, Blandford, Boschan, Colombi, Colombi, Couchman, Davis, Diaferio, Dipak Munshi, Fry, Groth, Gunn, Hamilton, Hui, Jain, Jain, Jain, Jain, Jaroszyński, Jaroszyński, Kaiser, Kaiser, Kauffmann, Kauffmann, Lahav, Lee, Limber, Miralda-Escudé, Mo, Munshi, Munshi, Munshi, Munshi, Munshi, Munshi, Munshi, Munshi, Nityananda, Padmanabhan, Peacock, Peacock, Peebles, Premadi, Reblinsky, Refregier, Schneider, Schneider, Schneider, Scoccimarro, Scoccimarro, Stebbins, Szapudi, Szapudi, Szapudi, Valageas, Valageas, van Waerbeke, Villumsen, Wambsganss, Wambsganss, Wambsganss, Wang, White   +71 more
core   +3 more sources

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

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

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

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