Scattering and absorption of a scalar field impinging on a charged black hole in the Einstein-Maxwell-dilaton theory

Richarte, Martín G.; Martins, Ébano L.; Fabris, Júlio C.

doi:10.48550/arxiv.2111.01595

Cited by 2 publications

(2 citation statements)

References 77 publications

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“…Decanini et al use the Regge pole techniques to show the relationship between the oscillatory pattern of the high-energy absorption cross-section and the Sinc(x) function (with Sinc(x) denote the sine cardinal sinc(x) ≡ sin x x ) with the photon sphere. This method extensively discussed in the literature [203][204][205][206][207][208][209].…”

Section: Bounds Of Greybody Factors and High-energy Absorption Cross-...mentioning

confidence: 99%

Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

et al. 2022

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Motivated by recent work on the Modified Maxwell (ModMax) black holes [Phys Lett B 10.1016/j.physletb.2020.136011], which are invariant in duality rotations and conformal transformations founded in [Phys Rev D 10.1103/PhysRevD.102.121703], we probe its effects on the shadow cast, weak field gravitational lensing, and neutrino propagation in its vicinity. Using the EHT data for the shadow diameter of Sgr. A* and M87*, and LIGO/VIRGO experiments for the dyonic ModMax black hole perturbations, we find constraints for ModMax parameters such as $$Q_\text {m}$$ Q m and the screening factor $$\gamma $$ γ . We also analyze how the shadow radius behaves as perceived by a static observer and one that is comoving with the cosmic expansion. The effect of the ModMax parameters is constant for a static observer, and we found That it varies when the observer is comoving with cosmic expansion. We also analyzed its effect on the weak deflection angle by exploiting the Gauss–Bonnet theorem and its application to Einstein ring formation. We also consider the finite distance effect and massive particle deflection. Our results indicate that the far approximation of massive particle gives the largest deflection angle and amplifies the effect of $$Q_\text {m}$$ Q m and $$\gamma $$ γ . Then we also calculate the quasinormal modes and greybody bounds which encode unique characteristic features of the dyonic ModMax black hole. With the advent of improving space technology, we reported that it is possible to detect the deviation caused through the shadow cast, Einstein rings, quasinormal modes, and neutrino oscillations.

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Section: Bounds Of Greybody Factors and High-energy Absorption Cross-...mentioning

confidence: 99%

Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

et al. 2022

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“…Some authors used the photon motion to study the BH shadow with different metrics: Kerr metric [28], Kerr-Newman metric [70] and some other rotating regular black holes [71]. Some works have used the shadow of M87* to test the alternative theories of gravity: the superspinar [72], the conformal massive gravity [73], the Gauss-Bonnet gravity [74], Einstein-Maxwell-dilaton theory [75] and symmergent gravity [76]. In this paper, we use the photon motion to calculate the ringdown waveform for Kerr black holes, arbitrarily axisymmetric and accelerating black holes.…”

Section: Introductionmentioning

confidence: 99%

Gravitational waveform model based on photon motion for spinning black holes

Li¹,

Han²

2022

Preprint

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The waveforms from binary black hole mergers include inspiral, merger and ringdown parts. Usually, the inspiral waveform can be obtained by calibrating from post-Newtonian approximation;The merger and ringdown ones can be gotten from the quasi-normal modes (QNMs) with black hole perturbation theory. However, for more general black holes, the calculation of the quasi-normal modes is not trivial. In this paper we use the photon sphere to get the quasi-normal modes of spinning black hole. Then we connect the ringdown wave with the inspiral part to get full waveforms and compare with the ones from numerical relativity(NR). We find that they match with each other very well. In principle this method can be extended to arbitrary black holes. As an example, the ringdown waveforms from parametrized axisymmetric black hole are obtained. We also use this method to get ringdown signals of the accelerating final black hole due to gravitational recoil during the merger. Even for the extreme cases, the acceleration due to the recoil can not produce detectable effects.

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Scattering and absorption of a scalar field impinging on a charged black hole in the Einstein-Maxwell-dilaton theory

Cited by 2 publications

References 77 publications

Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

Gravitational waveform model based on photon motion for spinning black holes

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