Motion of magnetically charged particles in a magnetically charged stringy black hole spacetime

González, P. A.; Olivares, Manuel; Papantonopoulos, Eleftherios; Saavedra, Joel; Vásquez, Yerko

doi:10.1103/physrevd.95.104052

Cited by 30 publications

(28 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rotating Kerr black holes may also be superradiantly unstable under massive scalar perturbation, where the mass of the scalar provides a natural mirror [16][17][18][19][20][21][22][23][24][25]. If a mirror-like boundary condition is imposed outside the black hole horizon or if the RN/Kerr black hole is asymptotically non-flat, the black hole is superradiantly unstable in certain parameter spaces [26][27][28][29][30][31]. Besides scalar perturbations, a massive vector perturbation on a rotating Kerr black hole has also been discussed [32,33].…”

Section: Introductionmentioning

confidence: 99%

Analytic study of superradiant stability of Kerr–Newman black holes under charged massive scalar perturbation

Zheng

Luo

et al. 2021

Eur. Phys. J. C

View full text Add to dashboard Cite

The superradiant stability of a Kerr–Newman black hole and charged massive scalar perturbation is investigated. We treat the black hole as a background geometry and study the equation of motion of the scalar perturbation. From the radial equation of motion, we derive the effective potential experienced by the scalar perturbation. By a careful analysis of this effective potential, it is found that when the inner and outer horizons of Kerr–Newman black hole satisfy $$\frac{r_-}{r_+}\leqslant \frac{1}{3}$$ r - r + ⩽ 1 3 and the charge-to-mass ratios of scalar perturbation and black hole satisfy $$ \frac{q}{\mu }\frac{Q}{ M}>1 $$ q μ Q M > 1 , the Kerr–Newman black hole and scalar perturbation system is superradiantly stable.

show abstract

Section: Introductionmentioning

confidence: 99%

Analytic study of superradiant stability of Kerr–Newman black holes under charged massive scalar perturbation

Zheng

Luo

et al. 2021

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…When a mirror or a cavity is placed around a charged RN black hole, it is proved that this black hole is superradiantly unstable under charged massive scalar perturbation in certain parameter spaces [20][21][22][23][24]. If the charged RN black holes are in asymptotically curved backgrounds, such as anti-de Sitter/de Sitter(AdS/dS) space, these curved backgrounds may provide natural mirror-like boundary conditions which lead to superradiant instability of the black hole and perturbation systems [25][26][27][28][29]. A similar case exists for charged RN black holes in string theory.…”

Section: (): V-volmentioning

confidence: 99%

Dyonic Reissner–Nordstrom black holes and superradiant stability

Zou

Mai

et al. 2021

Eur. Phys. J. C

View full text Add to dashboard Cite

Black holes immersed in magnetic fields are believed to be important systems in astrophysics. One interesting topic on these systems is their superradiant stability property. In the present paper, we analytically obtain the superradiantly stable regime for the asymptotically flat dyonic Reissner–Nordstrom black holes with charged massive scalar perturbation. The effective potential experienced by the scalar perturbation in the dyonic black hole background is obtained and analyzed. It is found that the dyonic black hole is superradiantly stable in the regime $$0<r_{-}/r_{+}<2/3$$ 0 < r - / r + < 2 / 3 , where $$r_\pm $$ r ± are the event horizons of the dyonic black hole. Compared with the purely electrically charged Reissner–Nordstrom black hole case, our result indicates that the additional coupling of the charged scalar perturbation with the magnetic filed makes the black hole and scalar perturbation system more superradiantly unstable, which provides further evidence on the instability induced by magnetic field in black hole superradiance process.

show abstract

“…We obtain the QNFs numerically by using the pseudospectral Chebyshev method [52] which is an effective method to find high overtone modes, and which has been applied for instance in Refs. [53,54]. In spite of the criticisms on the original 4D EGB, it is important to emphasize that the spherically symmetric Schwarzschild-like solution obtained in the D → 4 limit of the D-dimensional EGB theory is also a solution of theories formulated with the well defined limit D → 4 of EGB theory.…”

Section: Introductionmentioning

confidence: 99%

Perturbative and nonperturbative quasinormal modes of 4D Einstein–Gauss–Bonnet black holes

et al. 2020

Self Cite

View full text Add to dashboard Cite

We study the propagation of probe scalar fields in the background of 4D Einstein–Gauss–Bonnet black holes with anti-de Sitter (AdS) asymptotics and calculate the quasinormal modes. Mainly, we show that the quasinormal spectrum consists of two different branches, a branch perturbative in the Gauss–Bonnet coupling constant $$\alpha $$α and another branch, nonperturbative in $$\alpha $$α. The perturbative branch consists of complex quasinormal frequencies that approximate the quasinormal frequencies of the Schwarzschild AdS black hole in the limit of a null coupling constant. On the other hand, the nonperturbative branch consists of purely imaginary frequencies and is characterized by the growth of the imaginary part when $$\alpha $$α decreases, diverging in the limit of null coupling constant; therefore they do not exist for the Schwarzschild AdS black hole. Also, we find that the imaginary part of the quasinormal frequencies is always negative for both branches; therefore, the propagation of scalar fields is stable in this background.

show abstract

Motion of magnetically charged particles in a magnetically charged stringy black hole spacetime

Cited by 30 publications

References 45 publications

Analytic study of superradiant stability of Kerr–Newman black holes under charged massive scalar perturbation

Analytic study of superradiant stability of Kerr–Newman black holes under charged massive scalar perturbation

Dyonic Reissner–Nordstrom black holes and superradiant stability

Perturbative and nonperturbative quasinormal modes of 4D Einstein–Gauss–Bonnet black holes

Contact Info

Product

Resources

About