Shadow Cast by the Kerr MOG Black Hole under the Influence of Plasma and Constraints from EHT Observations

Abstract

The study of black hole (BH) shadows provide crucial insights into the nature of strong gravitational effects and the intricate structure of the spacetime surrounding BHs. In this paper, we explore the shadow of Kerr MOG BH within a plasma environment, investigating how much the presence of plasma influences the characteristics of the observed shadow compared to those in vacuum conditions. Our analysis reveals that the shadow characteristics of M87* and Sgr A* are more compatible with event horizon telescope (EHT) observational data in nonhomogeneous plasma spacetime compared to homogeneous distributions. For small metric deformation parameter $\alpha$, the shadow aligns within $2\sigma$ uncertainty for homogeneous plasma and within $1\sigma$ for nonhomogeneous plasma. Next, we determine the energy emission rate for the Kerr MOG BH and analyze the influence of parameters $\alpha$, $k_o$, $k_{\theta }$, and $k_r$ on particle emissions in the BH vicinity. We further analyze the deflection angle in the presence of homogeneous and nonhomogeneous plasma profiles. The findings indicate notable differences from the vacuum scenario, underscoring the importance of accounting for plasma effects in studying light propagation around compact objects.

arXiv comment25 pages, 11 captioned figures, Accepted for publication in Chinese Physics C

References in corpus (44)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• 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. II. Array and Instrumentation
• Testing the nature of dark compact objects: a status report
• First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
• Scalar-Tensor-Vector Gravity Theory
• Shadows of Kerr black holes with scalar hair
• The Black-Hole Mass in M87 from Gemini/NIFS Adaptive Optics Observations
• Measurement of the Kerr Spin Parameter by Observation of a Compact Object's Shadow
• Photon Regions and Shadows of Kerr-Newman-NUT Black Holes with a Cosmological Constant
• A Metric for Rapidly Spinning Black Holes Suitable for Strong-Field Tests of the No-Hair Theorem
• A new method for shadow calculations: application to parameterised axisymmetric black holes
• Observing the shadow of Einstein-Maxwell-Dilaton-Axion black hole
• The M87 Black Hole Mass from Gas-dynamical Models of Space Telescope Imaging Spectrograph Observations
• Shapes and Positions of Black Hole Shadows in Accretion Disks and Spin Parameters of Black Holes
• Gravitational Waves from Primordial Black Hole Mergers
• Black Holes in Modified Gravity (MOG)
• A coordinate-independent characterization of a black hole shadow
• Black Hole Parameter Estimation from Its Shadow
• Constraining the spin and the deformation parameters from the black hole shadow
• Light propagation in a plasma on Kerr spacetime: Separation of the Hamilton-Jacobi equation and calculation of the shadow
• Optical phenomena in brany Kerr spacetimes
• The Bullet Cluster 1E0657-558 evidence shows Modified Gravity in the absence of Dark Matter
• Rotation Curve of the Milky Way out to $\sim$ 200 kpc
• Spherical orbits around a Kerr black hole
• Testing modified gravity with globular cluster velocity dispersions
• Axion-plasmon or magnetized plasma effect on an observable shadow and gravitational lensing of a Schwarzschild black hole
• Observational signature of near-extremal Kerr-like black holes in a modified gravity theory at the Event Horizon Telescope
• Systematic Study of Event Horizons and Pathologies of Parametrically Deformed Kerr Spacetimes
• Shadow, deflection angle and quasinormal modes of Born-Infeld charged black holes
• Chaotic shadow of a non-Kerr rotating compact object with quadrupole mass moment
• Weak gravitational lensing and shadow of a GUP-modified Schwarzschild black hole in the presence of plasma
• Mass and spin of a Kerr black hole in modified gravity and a test of the Kerr black hole hypothesis
• Quantum effects on the black hole shadow and deflection angle in presence of plasma
• High gas fraction in a CO-selected main-sequence galaxy at $z>3$
• Black holes in dRGT massive gravity with the signature of EHT observations of M87*
• Testing the Kerr black hole hypothesis: comparison between the gravitational wave and the iron line approaches
• Effect of magnetized plasma on shadow and gravitational lensing of a Reissner-Nordström black hole
• Thermodynamics and Optical Properties of Phantom AdS Black Holes in Massive Gravity
• Observational optical constraints of regular black holes
• Kerr-Newman Black Holes in Weyl-Cartan Theory: Shadows and EHT constraints
• The Hamilton-Jacobi Equation: an intuitive approach
• Analytical expressions for pulse profile of neutron stars in plasma environments
• Observational signatures of Rotating compact objects in Plasma space-time

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• Shadows of a Non-Commutative Black Hole under the Influence of a Magnetized Plasma