Asymptotically-Flat Black Hole Solutions in Symmergent Gravity

Abstract

Symmergent gravity is an emergent gravity model with an $R+R^2$ curvature sector and an extended particle sector having new particles beyond the known ones. With constant scalar curvature, asymptotically flat black hole solutions are known to have no sensitivity to the quadratic curvature term (coefficient of $R^2$). With variable scalar curvature, however, asymptotically-flat symmergent black hole solutions turn out to explicitly depend on the quadratic curvature term. In the present work, we construct asymptotically-flat symmergent black holes with variable scalar curvature and use its evaporation, shadow, and deflection angle to constrain the symmergent gravity parameters. Concerning their evaporation, we find that the new particles predicted by symmergent gravity, even if they do not interact with the known particles, can enhance the black hole evaporation rate. Concerning their shadow, we show that statistically significant symmergent effects are reached at the $2\sigma$ level for the observational data of the Event Horizon Telescope (EHT) on the Sagittarius A* supermassive black hole. Concerning their weak deflection angle, we reveal discernible features for the boson-fermion number differences, particularly at large impact parameters. These findings hold the potential to serve as theoretical predictions for future observations and investigations on black hole properties.

20 pages, 10 figures. Accepted for publication in Fortschritte der Physik. Dedicated to Durmuş Demir (1967-2024), our supervisor, candid friend, and guiding light. His unwavering supports always led our way

References in corpus (50)

• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Black Hole Shadows, Photon Rings, and Lensing Rings
• Fermions Tunnelling from Black Holes
• Tunnelling, Temperature and Taub-NUT Black Holes
• Shadow of a black hole surrounded by dark matter
• Constraints on black-hole charges with the 2017 EHT observations of M87*
• Gravitational Test Beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
• Magnetically charged black holes from non-linear electrodynamics and the Event Horizon Telescope
• Black Holes in Higher-Derivative Gravity
• Shadow of five-dimensional rotating Myers-Perry black hole
• Shadows of Einstein-dilaton-Gauss-Bonnet black holes
• Dirac particles tunneling from BTZ black hole
• Chaotic lensing around boson stars and Kerr black holes with scalar hair
• Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes
• Hawking temperature from tunnelling formalism
• Probing a nonlinear electrodynamics black hole with thin accretion disk, shadow and deflection angle with M87* and Sgr A* from EHT
• Black hole mimicker hiding in the shadow: Optical properties of the $\gamma$-metric
• Shadows and gravitational weak lensing by the Schwarzschild black hole in the string cloud background with quintessential field
• Strong gravitational lensing and shadow constraint from M87* of slowly rotating Kerr-like black hole
• No-Hair Theorem in the Wake of Event Horizon Telescope
• Testing dynamical torsion effects on the charged black hole's shadow, deflection angle and greybody with M87* and Sgr. A* from EHT
• Dehnen halo effect on a black hole in an ultra-faint dwarf galaxy
• Static Solutions for 4th order gravity
• Tunneling of Vector Particles from Lorentzian Wormholes in 3+1 Dimensions
• Parameters estimation and strong gravitational lensing of nonsingular Kerr-Sen black holes
• Black Hole Shadow in Symmergent Gravity
• Black holes in galactic centers: quasinormal ringing, grey-body factors and Unruh temperature
• Probing the Lorentz Symmetry Violation Using the First Image of Sagittarius A*: Constraints on Standard-Model Extension Coefficients
• Testing Symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87${}^{\ast }$ and Sgr. A${}^{\ast }$ results
• Tunneling of Massive Vector Particles from Types of BTZ-like Black Holes
• 4D scale-dependent Schwarzschild-AdS/dS black holes: study of shadow and weak deflection angle and greybody bounding
• Hawking Radiation via Tunneling from Hot NUT-Kerr-Newman-Kasuya Spacetime
• The Effect of the Gauss-Bonnet term to Hawking Radiation from arbitrary dimensional Black Brane
• Deflection angle and shadow of the Reissner-Nordström black hole with higher-order magnetic correction in Einstein-nonlinear-Maxwell fields
• Black hole emission of vector particles in (1+1) dimensions
• Testing black hole mimickers with the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Generalised warped disk equations
• Generalized Extended Uncertainty Principle Black Holes: Shadow and lensing in the macro- and microscopic realms
• Shadow revisiting and weak gravitational lensing with Chern-Simons modification
• Nonlinearly charged black holes: Shadow and Thin-accretion disk
• Thermodynamics and logarithmic corrections of symmergent black holes
• A WKB approach to scalar fields dynamics in curved space-time
• Black Hole Evaporation Beyond the Standard Model of Particle Physics
• Emergent Gravity as the Eraser of Anomalous Gauge Boson Masses, and QFT-GR Concord
• Beyond Schwarzschild-de Sitter spacetimes: II. An exact non-Schwarzschild metric in pure $R^2$ gravity and new anomalous properties of $R^2$ spacetimes
• Beyond Schwarzschild-de Sitter spacetimes: I. A new exhaustive class of metrics inspired by Buchdahl for pure $R^2$ gravity in a compact form
• Orbits of light rays in (1+2)-dimensional Einstein-power-Maxwell gravity: Exact analytical solution to the null geodesic equations
• Constraining a one-dimensional wave-type gravitational wave parameter through the shadow of M87* via Event Horizon Telescope
• Beyond Schwarzschild-de Sitter spacetimes: III. A perturbative vacuum with non-constant scalar curvature in $R+R^2$ gravity
• Gauge and Poincare properties of the UV cutoff and UV completion in quantum field theory

Cited by in corpus (2)

• Quasinormal Modes and Greybody Factors of Charged Symmergent Black Hole
• Traces of quantum fuzziness on the black hole shadow and particle deflection in the multi-fractional theory of gravity