A review on analytical studies in Gravitational Lensing
In this study, we review some current studies on gravitational lensing for black holes, mainly
in the context of general relativity. We mainly focus on the analytical studies related to …
in the context of general relativity. We mainly focus on the analytical studies related to …
Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the strong-field …
unprecedented window onto tests of gravity and fundamental physics in the strong-field …
Flat energy spectrum of primordial gravitational waves versus peaks and the NANOGrav 2023 observation
VK Oikonomou - Physical Review D, 2023 - APS
In this work we present several characteristic examples of theories of gravity and particle
physics scenarios that may yield an observable energy spectrum of stochastic primordial …
physics scenarios that may yield an observable energy spectrum of stochastic primordial …
Superradiant evolution of the shadow and photon ring of Sgr
Ultralight bosons can affect the dynamics of spinning black holes (BHs) via superradiant
instability, which can lead to a time evolution of the supermassive BH shadow. We study …
instability, which can lead to a time evolution of the supermassive BH shadow. We study …
[PDF][PDF] Fundamental physics opportunities with the next-generation event horizon telescope
D Ayzenberg, L Blackburn, R Brito… - arXiv preprint arXiv …, 2023 - researchgate.net
Abstract The Event Horizon Telescope (EHT) Collaboration recently published the first
images of the supermassive black holes in the cores of the Messier 87 and Milky Way …
images of the supermassive black holes in the cores of the Messier 87 and Milky Way …
Probing a non-linear electrodynamics black hole with thin accretion disk, shadow, and deflection angle with M87* and Sgr A* from EHT
Non-linear interaction between the electromagnetic fields (EMF) occurs when vacuum
polarization in quantum electrodynamics (QED) happens. The field of non-linear …
polarization in quantum electrodynamics (QED) happens. The field of non-linear …
Tests of loop quantum gravity from the event horizon telescope results of Sgr A
Abstract The Event Horizon Telescope (EHT) collaboration's image of the compact object at
the Galactic center is the first direct evidence of the supermassive black hole (BH) Sgr A …
the Galactic center is the first direct evidence of the supermassive black hole (BH) Sgr A …
Strong gravitational lensing and shadow constraint from M87* of slowly rotating Kerr-like black hole
XM Kuang, A Övgün - Annals of Physics, 2022 - Elsevier
Motivated by (i) more and more interest in strong gravitational lensing by supermassive
black holes due to the achievement of EHT observations,(ii) the ongoing popular topic on …
black holes due to the achievement of EHT observations,(ii) the ongoing popular topic on …
Testing dynamical torsion effects on the charged black hole's shadow, deflection angle and greybody with M87* and Sgr. A* from EHT
Poincaré Gauge's theory of gravity is the most noteworthy alternative extension of general
relativity that has a correspondence between spin and spacetime geometry. In this paper …
relativity that has a correspondence between spin and spacetime geometry. In this paper …
Analytical study of gravitational lensing in Kerr-Newman black-bounce spacetime
S Ghosh, A Bhattacharyya - Journal of Cosmology and …, 2022 - iopscience.iop.org
We investigate the equatorial deflection angle of light rays propagating in Kerr-Newman
black-bounce spacetime. Furthermore, we analyze the light ray trajectories and derive a …
black-bounce spacetime. Furthermore, we analyze the light ray trajectories and derive a …