Results 41 to 50 of about 64,982 (304)
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
doaj +1 more source
Weak gravitational lensing by Bocharova–Bronnikov–Melnikov–Bekenstein black holes using Gauss–Bonnet theorem [PDF]
The European Physical Journal Plus, 2020 In this article, we demonstrate the weak gravitational lensing in the context of Bocharova–Bronnikov–Melnikov–Bekenstein (BBMB) black hole. To this desire, we derive the deflection angle of light in a plasma medium by BBMB black hole using the Gibbons ...
W. Javed +2 more
semanticscholar +1 more source
Kerr black hole surrounded by a cloud of strings and its weak gravitational lensing in Rastall gravity [PDF]
Physical Review D, 2020 In this paper, an exact solution of Kerr black hole surrounded by a cloud of strings in Rastall gravity is obtained by Newman-Janis algorithm. The influence of the string parameter $a_0$ on the black hole thermodynamics is studied. Furthermore, according
Zonghai Li, Tao Zhou
semanticscholar +1 more source
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
doaj +1 more source
Gravitational lensing effects of black hole with conformally coupled scalar hair
European Physical Journal C: Particles and Fields, 2023 In this paper, we investigate the gravitational lensing effects in the weak and strong field limits of a static black hole with conformally coupled scalar field.
Qi Qi +3 more
doaj +1 more source
Second-order weak lensing from modified gravity [PDF]
, 2011 We explore the sensitivity of weak gravitational lensing to second-order corrections to the spacetime metric within a cosmological adaptation of the parameterized post-Newtonian framework.
Caldwell, Robert R. +2 more
core +3 more sources
Weak Gravitational Lensing [PDF]
Proceedings of Frontiers of Fundamental Physics 14 — PoS(FFP14), 2008 In this brief review I consider the advances made in weak gravitational lensing over the last 8 years, concentrating on the large scales - cosmic shear. I outline the theoretical developments, observational status, and the challenges which cosmic shear must overcome to realise its full potential. Finally I consider the prospects for probing Dark Energy
openaire +6 more sources
The Bianchi identity and weak gravitational lensing [PDF]
Classical and Quantum Gravity, 2005 accepted to ...
Kling, Thomas P., Keith, B.
openaire +5 more sources
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
doaj +1 more source
Nulling tomography with weak gravitational lensing [PDF]
Physical Review D, 2005 We explore several strategies of eliminating (or nulling) the small-scale information in weak lensing convergence power spectrum measurements in order to protect against undesirable effects, for example the effects of baryonic cooling and pressure forces on the distribution of large-scale structures. We selectively throw out the small-scale information
Martin White, Dragan Huterer
openaire +3 more sources