# Universality of high-energy absorption cross sections for black holes

@article{Decanini2011UniversalityOH, title={Universality of high-energy absorption cross sections for black holes}, author={Yves D'ecanini and Gilles Esposito-Far{\`e}se and Antoine Folacci}, journal={Physical Review D}, year={2011}, volume={83}, pages={044032} }

We consider the absorption problem for a massless scalar field propagating in static and spherically symmetric black holes of arbitrary dimension endowed with a photon sphere. For this wide class of black holes, we show that the fluctuations of the high energy absorption cross section are totally and very simply described from the properties (dispersion relation and damping) of the waves trapped near the photon sphere and therefore, in the eikonal regime, from the characteristics (orbital…

## 71 Citations

### Fine structure of high-energy absorption cross sections for black holes

- Physics
- 2011

The high-energy absorption cross section of the Schwarzschild black hole is well approximated, in the eikonal regime, by the sum of two terms: the geometrical cross section of the black hole photon…

### Absorption of planar massless scalar waves by Kerr black holes

- Physics
- 2013

We consider planar massless scalar waves impinging upon a Kerr black hole, for general angles of incidence. We compute the absorption cross section via the partial wave approach, and present a…

### Resonance and absorption spectra of the Schwarzschild black hole for massive scalar perturbations: A complex angular momentum analysis

- Physics
- 2011

We reexamine some aspects of scattering by a Schwarzschild black hole in the framework of complex angular momentum techniques. More precisely, we consider, for massive scalar perturbations, the…

### Absorption cross section of regular black holes in scalar-tensor conformal gravity

- PhysicsPhysical Review D
- 2022

In terms of the complex angular momentum method, we compute the absorption cross section by analyzing a massless test scalar field around conformally related black holes. At first, we investigate…

### Schwarzschild-like black holes: Light-like trajectories and massless scalar absorption

- PhysicsThe European Physical Journal C
- 2020

Black holes are among the most intriguing objects in nature. They are believed to be fully described by General Relativity (GR), and the astrophysical black holes are expected to belong to the Kerr…

### Schwarzschild-like black holes: Light-like trajectories and massless scalar absorption

- Physics
- 2020

Black holes are among the most intriguing objects in nature. They are believed to be fully described by General Relativity (GR), and the astrophysical black holes are expected to belong to the Kerr…

### Connection between Sinc Approximation for High-Energy Absorption Cross Section and Shadow of Black Holes

- Physics
- 2021

This letter aims to show the connection between the sinc approximation for high-energy absorption cross section and the shadow radius of the spherically symmetric black hole. This connection can give…

### Electrically charged black holes in linear and nonlinear electrodynamics: Geodesic analysis and scalar absorption

- Physics
- 2020

Along the last decades, several regular black hole (BH) solutions, i.e., singularity-free BHs, have been proposed and associated to nonlinear electrodynamics models minimally coupled to general…

### Resonant scattering of light in a near-black-hole metric

- Physics
- 2013

We show that low-energy photon scattering from a body with radius R slightly larger than its Schwarzschild radius rs resembles black-hole absorption. This absorption occurs via capture resulting in…

## References

SHOWING 1-10 OF 36 REFERENCES

### Scattering theory of waves and particles

- Physics
- 1966

Much progress has been made in scattering theory since the publication of the first edition of this book fifteen years ago, and it is time to update it. Needless to say, it was impossible to…

### Phys

- Rev. D 81, 104039
- 2010

### Phys

- Rev. Lett. 78, 417
- 1997

### Phys

- Rev. D 56, 4975
- 1997

### Phys

- Rev. D 35, 3621
- 1987

### Phys

- Rev. D 79, 025023
- 2009

### Phys

- Rev. D 72, 104016
- 2005

### Phys

- Rev. D 56, 4984
- 1997

### Phys

- Rev. D 79, 064022
- 2009