Gray-body factor and absorption of the Dirac field in ESTGB gravity

Abstract

The gray-body factor and the absorption cross section of the 4D ESTGB gravity with a mode of nonlinear electrodynamics for the massless Dirac field are studied in this paper. The magnetic charge value varies between $-2^{(\frac{5}{3})}/3$ and $0$ as well as the ADM mass is set to $1$, which corresponds to a non-extreme black hole. The gray-body factor is obtained using the semi-analytic WKB method after solving the massless Dirac equation. When the absolute value of magnetic charge is increasing, the gray-body factor $\gamma (\omega )$ is decreasing. In addition, the partial absorption cross section and the total absorption cross section are calculated by using the partial wave method. We find that the maximum value of partial absorption cross section decreases as $\kappa$ increases. And the existence of magnetic charge causes the diminishing of the total absorption cross section. Finally, we find that the absorption cross section of the Dirac field is more sensitive to electric charge than magnetic charge by comparing the absorption cross section of the Reissner-Nordstr$\ddot{\mathrm{o}}$m and ESTGB-NLED black holes.

11 pages, 7 figures

References in corpus (8)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• Low surface brightness galaxies rotation curves in the low energy limit of $R^n$ gravity : no need for dark matter?
• Gauss-Bonnet black holes with a massive scalar field
• Black holes in galactic centers: quasinormal ringing, grey-body factors and Unruh temperature
• Absorption of a massive scalar field by a charged black hole
• Absorption of electromagnetic and gravitational waves by Kerr black holes: Shadows, superradiance and the spin-helicity effect
• Schwarzschild-like black holes: Light-like trajectories and massless scalar absorption
• Maxwell quasinormal modes on a global monopole Schwarzschild-anti-de Sitter black hole with Robin boundary conditions

Cited by in corpus (5)

• Absorption, scattering and shadow by a noncommutative black hole with global monopole
• Shadow, absorption and Hawking radiation of a Schwarzschild black hole surrounded by a cloud of strings in Rastall gravity
• Quasinormal modes, Hawking radiation and absorption of the massless scalar field for Bardeen black hole surrounded by perfect fluid dark matter
• Weak gravitational lensing by an ESTGB black hole in the presence of a plasma
• Scattering and absorption by extra-dimensional black holes with GUP