Kerr-Newman scalar clouds

By Carolina L. Benone, L. Crispino, Carlos A. R. Herdeiro, Eugen Radu. 2014

149 citations recorded by the source corpus.

Massive complex scalar fields can form bound states around Kerr black holes. These bound states---dubbed scalar clouds---are generically nonzero and finite on and outside the horizon; they decay exponentially at spatial infinity, have a real frequency and are specified by a set of integer ``quantum'' numbers $(n,l,m)$. For a specific set of these numbers, the clouds are only possible along a one-dimensional subset of the two-dimensional parameter space of Kerr black holes, called an existence line. In this paper we make a thorough investigation of the scalar clouds due to neutral (charged) scalar fields around Kerr(-Newman) black holes. We present the location of the existence lines for a variety of quantum numbers, their spatial representation and compare analytic approximation formulas in the literature with our exact numerical results, exhibiting a sometimes remarkable agreement.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d76a4a6ea496ec12edd55581df3c990ff280bc1c

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Paolo Pani
2. R. Brito
3. V. Cardoso
4. Carlos A. R. Herdeiro
5. Eugen Radu
6. H. R'unarsson
7. P. Cunha
8. Cosimo Bambi

In Nuclear and High Energy Physics

1. R. Brito
2. Paolo Pani
3. V. Cardoso
4. Carlos A. R. Herdeiro
5. Eugen Radu
6. H. R'unarsson
7. P. Cunha
8. Cosimo Bambi

Citations in the corpus

• Superradiance: Energy Extraction, Black-Hole Bombs and Implications for Astrophysics and Particle Physics (2015, background): “Nonlinear, hairy solutions were also extended to encompass rotating, charged geometries [477] whereas in Refs.”
• Kerr black holes with Proca hair (2016, background): “Existence line for Proca stationary clouds with m=1 (blue dotted line) and the comparable existence line for scalar stationary clouds (with = = = m l n see 1 , 0, [52], black double dotted line), in an ADM mass versus frequency = W w m H diagram of Kerr BHs.”
• Superradiance (2015, background): “small mass couplings M S, the spectrum of the scalar perturbations admits the hydrogenic-like solution (5.27), whereas the eigenfunctions are given in Eq. (5.29) [65,343]. The eigenfunction peaks at [9,481] r cloud ˘ (l+ n+ 1)2 (M S)2 M; (6.22) and thus extends well beyond the horizon, where rotatio”