Probing hairy black holes caused by gravitational decoupling using quasinormal modes and greybody bounds

Yang, Yi; Liu, Dong; Овгун, Али; Long, Zheng-Wen; Xu, Zhaoyi

doi:10.48550/arxiv.2203.11551

Cited by 4 publications

(5 citation statements)

References 39 publications

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“…The quasinormal modes of black holes have been studied extensively in different MGTs [45,[70][71][72][73][74][75][76][77][78]. In such a study, it was seen that the quasinormal modes from black JCAP02(2023)027 holes may play a very important part in distinguishing GR from f (R) gravity [71].…”

Section: Introductionmentioning

confidence: 99%

Tideless traversable wormholes surrounded by cloud of strings in f(R) gravity

Gogoi

Goswami

2023

J. Cosmol. Astropart. Phys.

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We study the tideless traversable wormholes in the f(R) gravity metric formalism. First we consider three shape functions of wormholes and study their viabilities and structures. The connection between the f(R) gravity model and wormhole shape function has been studied and the dependency of the f(R) gravity model with the shape function is shown. We also obtain a wormhole solution in the f(R) gravity Starobinsky model surrounded by a cloud of strings. In this case, the wormhole shape function depends on both the Starobinsky model parameter and the cloud of strings parameter. The structure and height of the wormhole is highly affected by the cloud of strings parameter, while it is less sensitive to the Starobinsky model parameter. The energy conditions have been studied and we found the ranges of the null energy condition violation for all wormhole structures. The quasinormal modes from these wormhole structures for the scalar and Dirac perturbations are studied using higher order WKB approximation methods. The quasinormal modes for the toy shape functions depend highly on the model parameters. In case of the Starobinsky model's wormhole the quasinormal frequencies and the damping rate increase with an increase in the Starobinsky model parameter in scalar perturbation. Whereas in Dirac perturbation, with an increase in the Starobinsky model parameter the quasinormal frequencies decrease and the damping rate increases. The cloud of strings parameter also impacts prominently and differently the quasinormal modes from the wormhole in the Starobinsky model.

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Section: Introductionmentioning

confidence: 99%

Tideless traversable wormholes surrounded by cloud of strings in f(R) gravity

Gogoi

Goswami

2023

J. Cosmol. Astropart. Phys.

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“…Afterwards, Davis et al showed how to obtain QNM oscillations from the infalling particle into Schwarzschild black hole [99] and Detweiler et al showed for Kerr black holes [100]. Black hole perturbations and QNMs are a wellstudied and active field to study, and there are various methods on different spacetimes in literature (for more information [101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116], see these reviews [117][118][119]). The QNMs could be detected through the gravitational wave interferometers, so we would like to explore the properties of background spacetime of ModMax black holes and try to probe the ModMax BH parameters by studying gravitational waves (GWs) at the ringdown stage.…”

Section: Introductionmentioning

confidence: 99%

“…Sanchez showed that the absorption spectrum as a function of the frequency makes clear oscillations characteristic of a diffraction pattern, where the oscillations occur around the constant value of the geometrical optics with decreasing amplitude and constant period. The absorption cross-section for black holes has been studied in the literature for various black hole spacetimes [46,108,[135][136][137][138][139][140][141][142][143][144][145][146], especially for the low-frequency behaviour of the absorption and for the zero-frequency limit (it becomes equal to the surface area of the black hole horizon) [136,147,148], as well as the high-frequency behaviour of the scalar absorption via Sinc approximation [134,149,150].…”

Section: Introductionmentioning

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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“…In addition, the stability and quasinormal modes (QNMs) of hairy black holes caused by gravitational decoupling under various field perturbations have been investigated in Refs. [68,69]. QNMs play a fundamental role in characterizing gravitational wave signals detected by LIGO and VIRGO [70,71].…”

Section: D+2 D+1mentioning

confidence: 99%

Gravitational decoupling for hairy black holes in asymptotic AdS spacetimes*

Zhang¹,

Zhang²,

Zou³

2023

Chinese Phys. C

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In this paper, the so-called extended geometric deformation (EGD) method is adopted for generating the black hole solutions due to its simplicity and effectiveness. Considering the external fields surrounding Schwarzschild AdS black hole, we obtain hairy black hole solutions in asymptotically AdS spacetime by adopting strong energy and dominate energy conditions, respectively. Moreover, we further found that if the black hole spacetime is a fluid system, the fluid under each of these conditions is anisotropic.

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Probing hairy black holes caused by gravitational decoupling using quasinormal modes and greybody bounds

Cited by 4 publications

References 39 publications

Tideless traversable wormholes surrounded by cloud of strings in f(R) gravity

Tideless traversable wormholes surrounded by cloud of strings in f(R) gravity

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

Gravitational decoupling for hairy black holes in asymptotic AdS spacetimes*

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