Axion-plasmon or magnetized plasma effect on an observable shadow and gravitational lensing of a Schwarzschild black hole

Article Physics, Particles & Fields

Weak gravitational lensing Schwarzschild-MOG black hole in plasma

Farruh Atamurotov et al.

Summary: The study found that the effects of the uniform plasma are significantly stronger than other plasma models, while the MOG parameter and plasma medium have similar effects on the total magnification of images.

EUROPEAN PHYSICAL JOURNAL C (2021)

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Article Astronomy & Astrophysics

Black hole shadows in Verlinde's emergent gravity

Kimet Jusufi et al.

Summary: The study investigates the impact of baryonic matter and apparent dark matter on black hole shadows in Verlinde's emergent gravity. The findings suggest that the effect of surrounding baryonic matter on shadow size is minimal, but becomes significant with increasing baryonic matter. Additionally, the intensity of electromagnetic flux radiation is influenced by the surrounding mass.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

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Review Physics, Multidisciplinary

Invisible axion search methods

Pierre Sikivie

Summary: The axion was proposed to solve the strong CP problem and provides a solution to the dark matter problem as well. Various methods have been proposed to search for dark matter axions and axions emitted by the Sun, leading to significant constraints on the notion of an invisible axion.

REVIEWS OF MODERN PHYSICS (2021)

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Article Astronomy & Astrophysics

Gravitational lensing in 4-D Einstein-Gauss-Bonnet gravity in the presence of plasma

Gulmina Zaman Babar et al.

Summary: This paper explores gravitational lensed photons in a 4 dimensional Einstein-Gauss-Bonnet gravity under weak-field regime, investigating lensing angle and image source brightness magnification in different paradigms. The results are compared with the standard Schwarzschild geometry.

PHYSICS OF THE DARK UNIVERSE (2021)

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Article Astronomy & Astrophysics

The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole

Ramesh Narayan et al.

Summary: Researchers explored the effects of synchrotron radiation from hot gas near a black hole on image polarization using a simple model. By comparing the model with general relativistic magnetohydrodynamic simulations of M87*, they found that the ring model broadly reproduces the polarimetric image morphology. This comparison is consistent with the clockwise rotation inferred from total intensity images, suggesting that the chosen parameters in the model are suitable.

ASTROPHYSICAL JOURNAL (2021)

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Article Astronomy & Astrophysics

First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon

Kazunori Akiyama et al.

Summary: The observations by the Event Horizon Telescope revealed important features of polarized emission around the supermassive black hole in M87, including disturbances in the polarization structure and a possible azimuthal linear polarization pattern formed by organized magnetic fields. This suggests insights into the structure of magnetic fields and plasma near the black hole, with implications for understanding the emission mechanisms and properties of the radiating plasma.

ASTROPHYSICAL JOURNAL LETTERS (2021)

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Article Astronomy & Astrophysics

Parameter estimation of hairy Kerr black holes from its shadow and constraints from M87

Misba Afrin et al.

Summary: The study reveals that the size and shape of hairy Kerr black holes are influenced by the parameter l(0), resulting in more distorted shadows compared to Kerr black holes. Estimating the parameters associated with hairy Kerr black holes through the investigation of ergosphere and shadows provides insights into the differences between these black holes.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

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Article Physics, Particles & Fields

Imprints of dark matter on black hole shadows using spherical accretions

K. Saurabh et al.

Summary: Researchers studied the identification of dark matter in the galactic center by analyzing the physical properties of electromagnetic radiation emitted from an optically-thin disk region surrounding a static and spherically symmetric black hole. Dark matter can either increase or decrease the intensity of electromagnetic flux radiation depending on the model, with a high energy density of dark matter near the black hole needed for a significant effect. The distribution of surrounding dark matter plays a key role in the shadow radius and intensity of electromagnetic flux radiation.

EUROPEAN PHYSICAL JOURNAL C (2021)

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Article Astronomy & Astrophysics

Charged black hole in 4D Einstein-Gauss-Bonnet gravity: particle motion, plasma effect on weak gravitational lensing and centre-of-mass energy

Farruh Atamurotov et al.

Summary: The study reveals that the combined effect of the Gauss-Bonnet coupling parameter and black hole charge influences the motion trajectories of particles and photons near the black hole, leading to significant changes in the gravitational deflection angle. The deflection angle is larger when considering uniform plasma compared to non-uniform plasma. Additionally, the center of mass energy in collision processes for non-spinning and spinning particles is affected by the GB parameter and black hole charge.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2021)

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Correction Astronomy & Astrophysics

Shadow and quasinormal modes of a rotating loop quantum black hole (vol 101, 084001, 2020)

Cheng Liu et al.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Particle acceleration around rotating Einstein-Born-Infeld black hole and plasma effect on gravitational lensing

Gulmina Zaman Babar et al.

Summary: The study examines the horizon and ergosphere structures in the background of rotating Einstein-Born-Infeld (EBI) black hole, analyzes the redshifted ultrahigh center-of-mass energy due to particle collisions near the horizon, and discusses the impact of plasma presence on strong gravitational lensing effects. The research also explores the deviation of angular positions of images for supermassive black holes Sgr A* and M87* when considering rotating EBI black holes as the lens compared to an analogous Kerr black hole.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Quasinormal modes, quasiperiodic oscillations, and the shadow of rotating regular black holes in nonminimally coupled Einstein-Yang-Mills theory

Kimet Jusufi et al.

Summary: This paper obtains an effective metric describing a regular and rotating magnetic black hole solution and studies various properties including BH shadow, QNMs, QPOs, and observational constraints on the EYM parameter. The study shows interesting correlations between the magnetic charge, shadow radius, and QNMs of scalar and electromagnetic fields, also distinguishing the rotating EYM black hole from the Kerr-Newman black hole.

PHYSICAL REVIEW D (2021)

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Review Physics, Multidisciplinary

The landscape of QCD axion models

Luca Di Luzio et al.

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS (2020)

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Article Physics, Particles & Fields

Optical properties of Kerr-Newman spacetime in the presence of plasma

Gulmina Zaman Babar et al.

EUROPEAN PHYSICAL JOURNAL C (2020)

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Article Astronomy & Astrophysics

Testing horizon topology with electromagnetic observations

Sourabh Nampalliwar et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Shadow, quasinormal modes, and quasiperiodic oscillations of rotating Kaluza-Klein black holes

M. Ghasemi-Nodehi et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Optical properties of dynamical axion backgrounds

Jamie McDonald et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Orbital mechanics and quasiperiodic oscillation resonances of black holes in Einstein-AEther theory

Mustapha Azreg-Ainou et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Shadow and quasinormal modes of a rotating loop quantum black hole

Cheng Liu et al.

PHYSICAL REVIEW D (2020)

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Article Physics, Multidisciplinary

Aspects of axion F(R) gravity

S. D. Odintsov et al.

EPL (2020)

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Article Astronomy & Astrophysics

Axion production in unstable magnetized plasmas

J. T. Mendonca et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Rotating regular black holes in conformal massive gravity

Kimet Jusufi et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Shadows of spherically symmetric black holes and naked singularities

Rajibul Shaikh et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2019)

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Article Astronomy & Astrophysics

Finite distance corrections to the light deflection in a gravitational field with a plasma medium

Gabriel Crisnejo et al.

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

Unification of inflation with dark energy in f (R) gravity and axion dark matter

S. D. Odintsov et al.

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

Kazunori Akiyama et al.

ASTROPHYSICAL JOURNAL LETTERS (2019)

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Article Astronomy & Astrophysics

Higher order corrections to deflection angle of massive particles and light rays in plasma media for stationary spacetimes using the Gauss-Bonnet theorem

Gabriel Crisnejo et al.

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

Two families of astrophysical diverging lens models

Xinzhong Er et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2018)

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Article Astronomy & Astrophysics

Revisiting the shadow of a black hole in the presence of a plasma

Yang Huang et al.

INTERNATIONAL JOURNAL OF MODERN PHYSICS D (2018)

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Article Physics, Multidisciplinary

Axion-Plasmon Polaritons in Strongly Magnetized Plasmas

H. Tercas et al.

PHYSICAL REVIEW LETTERS (2018)

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Article Astronomy & Astrophysics

Weak lensing in a plasma medium and gravitational deflection of massive particles using the Gauss-Bonnet theorem. A unified treatment

Gabriel Crisnejo et al.

PHYSICAL REVIEW D (2018)

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Article Astronomy & Astrophysics

Plasma effects on lasing of a uniform ultralight axion condensate

Srimoyee Sen

PHYSICAL REVIEW D (2018)

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Article Physics, Particles & Fields

Strong gravitational lensing by a charged Kiselev black hole

Mustapha Azreg-Ainou et al.

EUROPEAN PHYSICAL JOURNAL C (2017)

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Article Physics, Multidisciplinary

New CAST limit on the axion-photon interaction

V. Anastassopoulos et al.

NATURE PHYSICS (2017)

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Article Physics, Particles & Fields

Why the cosmological constant is so small? A string theory perspective

S-H. Henry Tye et al.

ADVANCES IN THEORETICAL AND MATHEMATICAL PHYSICS (2017)

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Article Astronomy & Astrophysics

Optical properties of a braneworld black hole: Gravitational lensing and retrolensing

Ahmadjon Abdujabbarov et al.

PHYSICAL REVIEW D (2017)

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Article Astronomy & Astrophysics

Gravitational Lensing in Presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow

Gennady S. Bisnovatyi-Kogan et al.

UNIVERSE (2017)

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Article Astronomy & Astrophysics

Light propagation in a plasma on Kerr spacetime: Separation of the Hamilton-Jacobi equation and calculation of the shadow

Volker Perlick et al.

PHYSICAL REVIEW D (2017)

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Article Astronomy & Astrophysics

Gravitational lensing by a non-Schwarzschild black hole in a plasma

Abdullo Hakimov et al.

ASTROPHYSICS AND SPACE SCIENCE (2016)

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Article Physics, Particles & Fields

Horizon structure of rotating Einstein-Born-Infeld black holes and shadow

Farruh Atamurotov et al.

EUROPEAN PHYSICAL JOURNAL C (2016)

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Article Astronomy & Astrophysics

Constraining the Cardoso-Pani-Rico metric with future observations of SgrA*

Cosimo Bambi

CLASSICAL AND QUANTUM GRAVITY (2015)

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Article Astronomy & Astrophysics

Frequency-dependent effects of gravitational lensing within plasma

Adam Rogers

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2015)

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Article Astronomy & Astrophysics

Strong gravitational lensing by Kiselev black hole

Azka Younas et al.

PHYSICAL REVIEW D (2015)

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Article Astronomy & Astrophysics

Influence of a plasma on the shadow of a spherically symmetric black hole

Volker Perlick et al.

PHYSICAL REVIEW D (2015)

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Article Astronomy & Astrophysics

Optical properties of black holes in the presence of a plasma: The shadow

Farruh Atamurotov et al.

PHYSICAL REVIEW D (2015)

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Article Physics, Fluids & Plasmas

Gravitational Lensing in Plasmic Medium

G. S. Bisnovatyi-Kogan et al.

PLASMA PHYSICS REPORTS (2015)

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Article Astronomy & Astrophysics

Shadow of Kerr-Taub-NUT black hole

Ahmadjon Abdujabbarov et al.

ASTROPHYSICS AND SPACE SCIENCE (2013)

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Article Astronomy & Astrophysics

Shadow of rotating non-Kerr black hole

Farruh Atamurotov et al.

PHYSICAL REVIEW D (2013)

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Article Astronomy & Astrophysics

Can the supermassive objects at the centers of galaxies be traversable wormholes? The first test of strong gravity for mm/sub-mm very long baseline interferometry facilities

Cosimo Bambi

PHYSICAL REVIEW D (2013)

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Review Astronomy & Astrophysics

Gravitational lensing

Matthias Bartelmann

CLASSICAL AND QUANTUM GRAVITY (2010)

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Article Astronomy & Astrophysics

Relativistic images of Schwarzschild black hole lensing

K. S. Virbhadra

PHYSICAL REVIEW D (2009)

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Article Astronomy & Astrophysics

Applications of the Gauss-Bonnet theorem to gravitational lensing

G. W. Gibbons et al.

CLASSICAL AND QUANTUM GRAVITY (2008)

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Article Astronomy & Astrophysics

Comparison of approximate gravitational lens equations and a proposal for an improved new one

V. Bozza

PHYSICAL REVIEW D (2008)

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Article Physics, Particles & Fields

Axions in string theory

Peter Svrcek et al.

JOURNAL OF HIGH ENERGY PHYSICS (2006)

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Article Physics, Mathematical

The geometry of photon surfaces

CM Claudel et al.

JOURNAL OF MATHEMATICAL PHYSICS (2001)

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Schwarzschild black hole lensing

KS Virbhadra et al.

PHYSICAL REVIEW D (2000)

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Article Astronomy & Astrophysics

Viewing the shadow of the black hole at the Galactic center

H Falcke et al.

ASTROPHYSICAL JOURNAL (2000)

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Axion-plasmon or magnetized plasma effect on an observable shadow and gravitational lensing of a Schwarzschild black hole

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