Shadow behavior of an EMSG charged black hole

Abstract

Recent shadow images of Sgr A and M87 captured by Event Horizon Telescope (EHT) collaboration confirms the existence of black holes or their possible alternatives in the center of galaxies. On the other hand, the new image of Sgr A in polarized light suggests a Magnetic field spiraling at the Edge of the Milky Way Central Black Hole. Due to the gravitational lensing effect, the bending of light in the background geometry of the black hole casts a shadow. In recent years, black holes and their properties have been vastly studied in the framework of General Relativity and other modified theories of gravity. One of the possibilities to generalize GR is Energy Momentum Squared Gravity (EMSG). It is important to mention that EMSG modifies all matter field equations, adding some non linear terms to Maxwell equations. EMSG theory as a modified theory of gravity predicts an asymptotically de Sitter charged black hole whose shadow cast and other related characteristics have not been examined yet. Hence we consider the EMSG charged black hole and investigate the shadow shape of this kind of black hole solution in confrontation with EHT results. In the case of non linear electrodynamics, the path of the photon is null on some effective metric. By deriving the effective metric of an EMSG charged black hole we study the null geodesics of the effective metric in the Hamilton Jacobi method. we find the photon orbits and compute the shadow size of this black hole. Then we examine how electric charge and the coupling constant of the EMSG affect the shadow size of the black hole in a positively accelerated expanding universe (with a positive cosmological constant). We explore the viable values of these parameters constrained by EHT data by comparing the shadow radius of an EMSG charged black hole with the shadow size of Sgr A.

16 pages, 8 figures, 2 tables

References in corpus (54)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• f(R) theories
• Extended Theories of Gravity
• Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• 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
• First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
• First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Black holes, gravitational waves and fundamental physics: a roadmap
• First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
• First Sagittarius A* Event Horizon Telescope Results. VI: Testing the Black Hole Metric
• Calculating black hole shadows: Review of analytical studies
• Detection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole
• First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole
• Relativistic redshift of the star S0-2 orbiting the Galactic center supermassive black hole
• First Sagittarius A* Event Horizon Telescope Results. III: Imaging of the Galactic Center Supermassive Black Hole
• First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multi-wavelength Observations, Data Processing, and Calibration
• First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass
• Observing the shadow of Einstein-Maxwell-Dilaton-Axion black hole
• Magnetically charged black holes from non-linear electrodynamics and the Event Horizon Telescope
• Nonlinear electrodynamics effects on the black hole shadow, deflection angle, quasinormal modes and greybody factors
• Black hole shadow in an expanding universe with a cosmological constant
• Energy-Momentum Squared Gravity
• $f(R,T_{\mu \nu }{T}^{\mu \nu })$ gravity and Cardassian-like expansion as one of its consequences
• Universality of high-energy absorption cross sections for black holes
• Cosmological Models in Energy-Momentum-Squared Gravity
• Light propagation in non-trivial QED vacua
• Astrophysical Black Holes: A Compact Pedagogical Review
• Compact stars in Energy-Momentum Squared Gravity
• Shadows and lensing of black holes immersed in strong magnetic fields
• Constraint on energy-momentum squared gravity from neutron stars and its cosmological implications
• Screening $\Lambda$ in a new modified gravity model
• Fine structure of high-energy absorption cross sections for black holes
• Color-flavor locked quark stars in energy-momentum squared gravity
• Viability of bouncing cosmology in energy-momentum-squared gravity
• Cosmological implications of scale-independent energy-momentum squared gravity: Pseudo nonminimal interactions in dark matter and relativistic relics
• Black hole shadow with a cosmological constant for cosmological observers
• A classification of the effective metric in nonlinear electrodynamics
• Generalized Energy-Momentum-Squared Gravity in the Palatini Formalism
• Jeans analysis in energy-momentum-squared gravity
• Thermodynamics of the apparent horizon in the generalized energy-momentum-squared cosmology
• Temporally Varying Universal Gravitational "Constant" and Speed of Light in Energy Momentum Squared Gravity
• Noether Symmetry Approach in Energy-Momentum Squared Gravity
• Constraints on Energy Momentum Squared Gravity from cosmic chronometers and Supernovae Type Ia data
• Constraining Energy-Momentum-Squared Gravity by binary pulsar observations
• Noether Symmetries and Anisotropic Universe in Energy-Momentum Squared Gravity
• Evolution of Spherical Overdensities in Energy-Momentum-Squared Gravity
• Non-minimal Energy-momentum squared gravity
• Gödel-type universes in energy-momentum-squared gravity

Cited by in corpus (5)

• Multimodal signatures of asymptotic (A)dS Kalb-Ramond black holes: Constraints through the shadow, weak deflection angle, and topological photon spheres
• Optical Signatures of Einstein-Euler-Heisenberg AdS/dS Black Holes in the light of Event Horizon Telescope
• Image of Quantum Improved Regular Kerr Black Hole and Parameter Constraints from EHT Observations
• Modelling the Sgr A${}^{\ast }$ and M87${}^{\ast }$ shadows by using the Kerr-Taub-NUT metrics in the presence of a scalar field
• Sagittarius A* near-infrared flares polarization as a probe of space-time I: Non-rotating exotic compact objects