Results 1 to 10 of about 1,065 (217)
The gravitational bending of acoustic Schwarzschild black hole [PDF]
European Physical Journal C: Particles and Fields, 2023 Acoustic black hole is becoming an attractive topic in recent years, for it open-up new direction for experimental/observational explorations of black holes.
Chen-Kai Qiao, Mi Zhou
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Weak deflection gravitational lensing for photons coupled to Weyl tensor in a Schwarzschild black hole [PDF]
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
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Observational Test of f(Q) Gravity with Weak Gravitational Lensing
The Astrophysical JournalIn this article we confront a class of f ( Q ) gravity models with observational data of galaxy–galaxy lensing. Specifically, we consider f ( Q ) gravity models containing a small quadratic correction when compared with general relativity (GR), and ...
Qingqing Wang +4 more
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Geometric Outlines of the Gravitational Lensing and Its Astronomic Applications
Universe, 2023 Gravitational lensing is a topic of great application value in the field of astronomy. The properties and research methods of gravitational lensing are closely related to the geometric and relativistic characteristics of the background universe.
Bin Shen, Mingyang Yu
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Gravitational Lensing of Acoustic Charged Black Holes
The Astrophysical Journal, 2023 We study the gravitational lensing of acoustic charged black holes in strong and weak field limit approximations. For this purpose, we first numerically obtain the deflection limit coefficients and deflection angle in the strong field limit.
Niyaz Uddin Molla, Ujjal Debnath
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Toward an Optimal Reconstruction of the Shear Field with PDF-folding
The Astrophysical Journal, 2023 Weak lensing provides a direct way of mapping the density distribution in the Universe. To reconstruct the density field from the shear catalog, an important step is to build the shear field from the shear catalog, which can be quite nontrivial due to ...
Haoran Wang +3 more
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Testing Velocity-field Lensing on IllustrisTNG Galaxies
The Astrophysical Journal, 2023 Weak gravitational lensing shear could be measured far more precisely if information about unlensed attributes of source galaxies were available. Disk galaxy velocity fields supply such information, at least in principle, with idealized models predicting
Jean Donet, David Wittman
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Detecting and Characterizing Young Quasars. III. The Impact of Gravitational Lensing Magnification
The Astrophysical Journal, 2023 We test the impact of gravitational lensing on the lifetime estimates of seven high-redshift quasars at redshift z ≳ 6. The targeted quasars are identified by their small observed proximity zone sizes, which indicate extremely short quasar lifetimes ( t ...
Minghao Yue +10 more
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The Astronomical Journal, 2023 The Superpressure Balloon-borne Imaging Telescope ( SuperBIT ) is a diffraction-limited, wide-field, 0.5 m, near-infrared to near-ultraviolet observatory designed to exploit the stratosphere’s space-like conditions.
Jacqueline E. McCleary +25 more
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Dark Matter as Gravitational Solitons in the Weak Field Limit
Universe, 2020 In this paper, we will describe the idea that dark matter partly consists of gravitational solitons (gravisolitons). The corresponding solution is valid for weak gravitational fields (weak field limit) with respect to a background metric.
Torsten Asselmeyer-Maluga, Jerzy Król
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