Black Hole Shadows in M-theory Scenarios

Abstract

We study the shadows of four dimensional black holes in M-theory inspired models. We first inspect the influence of M2-branes on such optical aspects for non-rotating solutions. In particular, we show that the M2-brane number can control the circular shadow size. This geometrical behavior is distorted for rotating solutions exhibiting cardioid shapes in certain moduli space regions. Implementing a rotation parameter, we analyze the geometrical shadow deformations. Among others, we recover the circular behaviors for a large M2-brane number. Investigating the energy emission rate at high energies, we find, in a well-defined approximation, that the associated peak decreases with the M2-brane number. Moreover, we investigate a possible connection with observations (from Event Horizon Telescope or future devices) from a particular M-theory compactification by deriving certain constraints on the M2-brane number in the light of the $M87^{\star }$ observational parameters.

arXiv commentlatex, 21 pages, and 8 figures. A section in connexion with observations has been added. Accepted for publication in International Journal of Modern Physics D (2021)

References in corpus (41)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
• Solutions Of Four-Dimensional Field Theories Via M Theory
• Schwarzschild black hole lensing
• Black Hole Entropy in M-Theory
• The geometry of photon surfaces
• Shadows of Kerr black holes with scalar hair
• Testing the rotational nature of the supermassive object M87* from the circularity and size of its first image
• 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
• Shadow of rotating regular black holes
• Hunting for extra dimensions in the shadow of M87*
• Shadow of a black hole surrounded by dark matter
• A new method for shadow calculations: application to parameterised axisymmetric black holes
• Observing the shadow of Einstein-Maxwell-Dilaton-Axion black hole
• Black hole shadow in an asymptotically-flat, stationary, and axisymmetric spacetime: The Kerr-Newman and rotating regular black holes
• Shadow and Deflection Angle of Rotating Black Holes in Perfect Fluid Dark Matter with a Cosmological Constant
• Shadow cast and Deflection angle of Kerr-Newman-Kasuya spacetime
• Black Hole Surrounded by a Dark Matter Halo in the M87 Galactic Center and its Identification with Shadow Images
• Testing General Relativity with the Shadow Size of Sgr A*
• Phase transition and Thermodynamical geometry of Reissner-Nordström-AdS Black Holes in Extended Phase Space
• Shadows and deflection angle of charged and slowly rotating black holes in Einstein-Æther theory
• Shadow of a Spinning Black Hole in an Expanding Universe
• BlackHoleCam: fundamental physics of the Galactic center
• Shapes of rotating nonsingular black hole shadows
• Imaging the Supermassive Black Hole Shadow and Jet Base of M87 with the Event Horizon Telescope
• Light escape cones in local reference frames of Kerr-de Sitter black hole spacetimes and related black hole shadows
• Testing Rotating Regular Metrics as Candidates for Astrophysical Black Holes
• Shadow cast by rotating braneworld black holes with a cosmological constant
• Analytical calculation of black hole spin using deformation of the shadow
• Rotating black holes in 4d gauged supergravity
• Einstein-scalar-Gauss-Bonnet black holes: Analytical approximation for the metric and applications to calculations of shadows
• Observational signature of near-extremal Kerr-like black holes in a modified gravity theory at the Event Horizon Telescope
• Shadows of Bonnor black dihole by chaotic lensing
• On Thermodynamics of AdS Black Holes in M-Theory
• Wormhole Shadows in Rotating Dust
• Categorisation and Detection of Dark Matter Candidates from String/M-theory Hidden Sectors
• Phase Transitions of Quintessential AdS Black Holes in M-theory/Superstring Inspired Models
• Gravity duals of N=(0,2) SCFTs from M5-branes
• Cosmological Constant Effect on Charged and Rotating Black Hole Shadows

Cited by in corpus (17)

• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Superradiance evolution of black hole shadows revisited
• No-Hair Theorem in the Wake of Event Horizon Telescope
• Einstein-Æther Gravity in the light of Event Horizon Telescope Observations of M87*
• Shadows of 5D Black Holes from String Theory
• Shadows and lensing of black holes immersed in strong magnetic fields
• Superradiant evolution of the shadow and photon ring of Sgr A${}^{\star }$
• Probing the Lorentz Symmetry Violation Using the First Image of Sagittarius A*: Constraints on Standard-Model Extension Coefficients
• Constraints on Barrow entropy from M87* and S2 star observations
• Asymptotically locally flat and AdS higher-dimensional black holes of Einstein-Horndeski-Maxwell gravity in the light of EHT observations: shadow behavior and deflection angle
• Shadow cast by a rotating and nonlinear magnetic-charged black hole in perfect fluid dark matter
• Superentropic AdS Black Hole Shadows
• Light Deflection by Rotating Regular Black Holes with a Cosmological Constant
• Light Deflection Angle by Superentropic Black Holes
• Shadow thermodynamics of non-linear charged Anti-de Sitter black holes
• Optical Shadows of Rotating Bardeen AdS Black Holes
• Superentropic Black Hole Shadows in Arbitrary Dimensions