# Floating Orbits, Superradiant Scattering and the Black-hole Bomb

@article{Press1972FloatingOS, title={Floating Orbits, Superradiant Scattering and the Black-hole Bomb}, author={William H. Press and Saul A. Teukolsky}, journal={Nature}, year={1972}, volume={238}, pages={211-212} }

Penrose1 and Christodoulou2 have shown how, in principle, rotational energy can be extracted from a black hole by orbiting and fissioning particles. Recently, Misner3 has pointed out that waves can also extract rotational energy (“superradiant scattering” in which an impinging wave is amplified as it scatters off a rotating hole). As one application of super-radiant scattering, Misner has suggested the possible existence of “floating orbits”, that is, orbits in which a particle radiatively…

## 452 Citations

### Black hole superradiance as a probe of ultra-light new particles

- PhysicsProceedings of the International Astronomical Union
- 2016

Abstract Bosonic fields around a spinning black hole can be amplified via ‘superradiance’, a wave analogue of the Penrose process, which extracts energy and momentum from the black hole. For…

### Superradiance by mini black holes with mirror

- Physics
- 2012

A bstractThe superradiant scattering of massive scalar particles by a rotating mini black hole is investigated. Imposing the mirror boundary condition, the system becomes the so called black-hole…

### Floating and sinking: the imprint of massive scalars around rotating black holes.

- PhysicsPhysical review letters
- 2011

It is shown that matter can hover into "floating orbits" for which the net gravitational energy loss at infinity is entirely provided by the black hole's rotational energy, and these effects could be a smoking gun of deviations from general relativity.

### BLACK-HOLE BOMBS AT THE LHC

- Physics
- 2012

A particle scattered off by a rotating black hole can be amplified when the system is in the superradiant regime. If the system is surrounded by a mirror which reflects the particle back to the black…

### Gravitational waves from superradiant instabilities of rotating black holes

- PhysicsModern Physics Letters A
- 2021

Direct detection of gravitational waves from several compact binary coalescences has ushered in a new era of astronomy. It has opened up the possibility of detecting ultralight bosons, predicted by…

### Black hole bombs and explosions: from astrophysics to particle physics

- Physics
- 2013

Black holes are the elementary particles of gravity, the final state of sufficiently massive stars and of energetic collisions. With a 40-year long history, black hole physics is a fully-blossomed…

### A new type of charged black hole bomb

- PhysicsGeneral Relativity and Gravitation
- 2020

Black hole bombs are usually constructed by surrounding an ergoregion by a mirror. The fields propagating between the event horizon and the mirror are prevented from escaping to infinity and…

### Gravitational collider physics

- PhysicsPhysical Review D
- 2020

We study the imprints of new ultralight particles on the gravitational-wave signals emitted by binary black holes. Superradiant instabilities may create large clouds of scalar or vector fields around…

### Gravitational wave signatures of ultralight vector bosons from black hole superradiance

- PhysicsPhysical Review D
- 2020

In the presence of an ultralight bosonic field, spinning black holes are unstable to superradiance. The rotational energy of the black hole is converted into a nonaxisymmetric, oscillating boson…

## References

SHOWING 1-4 OF 4 REFERENCES

### Global structure of the Kerr family of gravitational fields

- Physics
- 1968

The Kerr family of solutions of the Einstein and Einstein-Maxwell equations is the most general class of solutions known at present which could represent the field of a rotating neutral or…

### Maximal Analytic Extension of the Kerr Metric

- Mathematics, Physics
- 1967

Kruskal's transformation of the Schwarzschild metric is generalized to apply to the stationary, axially symmetric vacuum solution of Kerr, and is used to construct a maximal analytic extension of the…

### Interpretation of gravitational-wave observations.

- Physics, Geology
- 1972

Weber's (1971) interpretation of his observations involving a source at the center of the Galaxy isotropically radiating in the form of gravitational waves is discussed. The gravitational-wave flux…

### Reversible and Irreversible Transformations in Black-Hole Physics

- Physics
- 1970

The concepts of irreducible mass and of reversible and irreversible transformations in black holes are introduced, leading to the formula…