Shadows and Optical Appearances of Black Holes in $R^2$ Gravity

Abstract

In this paper, we consider a charged AdS/dS black hole (BH) in $R^2$ gravity and study its optical features, including the shadow's geometrical shape and the energy emission rate. Additionally, we look for criteria to restrict the free parameters of the theory by comparing them to observational data of M87${}^{\star }$. Then, we employ the Newman-Janis algorithm to build the rotating counterpart of the static solution in $R^2$ gravity and calculate the energy emission rate for the rotating case as well as discuss how the rotation factor and other parameters of this theory affect the emission of particles around the BHs. In the following, we consider the obtained rotating BH as a supermassive black hole and evaluate the parameters of the model with shadow size estimates based on the observations of M87${}^{\star }$ from EHT.

21 pages,13 figures, accepted for publication in Astroparticle Physics

References in corpus (29)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• Cosmology and the Fate of Dilatation Symmetry
• First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• Shadow of a black hole surrounded by dark matter
• Constraints on black-hole charges with the 2017 EHT observations of M87*
• Shadow of a Kaluza-Klein rotating dilaton black hole
• Discovery of a Disk Gap Candidate at 20 AU in TW Hydrae
• Shadows and gravitational weak lensing by the Schwarzschild black hole in the string cloud background with quintessential field
• Influence of the relict cosmological constant on accretion discs
• Testing Rotating Regular Metrics with EHT Results of Sgr A*
• Dynamics of particles and epicyclic motions around Schwarzschild-de-Sitter black hole in perfect fluid dark matter
• Axion-plasmon or magnetized plasma effect on an observable shadow and gravitational lensing of a Schwarzschild black hole
• Charged particle and epicyclic motions around $4D$ Einstein-Gauss-Bonnet black hole immersed in an external magnetic field
• Accretion disk luminosity for black holes surrounded by dark matter
• Observational properties of relativistic fluid spheres with thin accretion disks
• Testing strong gravitational lensing effects by supermassive compact objects with regular spacetimes
• Kerr black holes with synchronised Proca hair: lensing, shadows and EHT constraints
• Motion of charged and spinning particle influenced by dark matter field surrounding a charged dyonic black hole
• Constraints on the magnetized Ernst black hole spacetime through quasiperiodic oscillations
• Geodesics structure and deflection angle of electrically charged black holes in gravity with a background Kalb-Ramond field
• Black holes in dRGT massive gravity with the signature of EHT observations of M87*
• Effect of magnetized plasma on shadow and gravitational lensing of a Reissner-Nordström black hole
• On the parameters of the spherically symmetric parametrized Rezzolla-Zhidenko spacetime through solar system tests, orbit of S2 star about Sgr A${}^{\star }$, and quasiperiodic oscillations
• Shadows and weak gravitational lensing by the black hole in Einstein-Maxwell-scalar theory
• Kerr-Newman Black Holes in Weyl-Cartan Theory: Shadows and EHT constraints
• Observational tests of asymptotically flat ${\mathcal{R}}^2$ spacetimes
• Observational test of ${\mathcal{R}}^2$ spacetimes with the S2 star in the Milky Way galactic center

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• Strong Lensing Effect and Quasinormal Modes of Oscillations of Black Holes in $\mathbf{f}(\mathbf{R},\mathbf{T})$ Gravity Theory
• Shadow geometry of Kerr MOG naked singularity and analysis of accretion disk luminosity
• Black holes in $f(R,T)$ gravity coupled with Euler-Heisenberg electrodynamics
• Dynamics of Geodesics in Non-linear Electrodynamics Corrected Black Hole and Shadows of its Rotating Analogue