Quasinormal modes, shadow and thermodynamics of black holes coupled with nonlinear electrodynamics and cloud of strings

Singh, Dharm Veer; Shukla, A.; Upadhyay, Sudhaker

doi:10.1016/j.aop.2022.169157

Cited by 18 publications

(7 citation statements)

References 53 publications

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“…To our case, our parameter a seems to 'mimic' the effects brought about by these ones. Additionally, a similar behavior is seen for the shadows as well [160].…”

Section: Shadowssupporting

confidence: 70%

Analysis of a regular black hole in Verlinde’s gravity

Araújo Filho

2023

Class. Quantum Grav.

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This work focuses on the examination of a regular black hole within Verlinde’s emergent gravity, specifically investigating the Hayward-like (modified) solution. The study reveals the existence of three horizons under certain conditions, i.e. an event horizon and two Cauchy horizons. Our results indicate regions which phase transitions occur based on the analysis of heat capacity and Hawking temperature. To compute the latter quantity, we utilize three distinct methods: the surface gravity approach, Hawking radiation, and the application of the first law of thermodynamics. In the case of the latter approach, it is imperative to introduce a correction to ensure the preservation of the Bekenstein–Hawking area law. Geodesic trajectories and critical orbits (photon spheres) are calculated, highlighting the presence of three light rings. Additionally, we investigate the black hole shadows. Furthermore, the quasinormal modes are explored using third- and sixth-order Wentzel–Kramers–Brillouin approximations. In particular, we observe stable and unstable oscillations for certain frequencies. Finally, in order to comprehend the phenomena of time-dependent scattering in this scenario, we provide an investigation of the time-domain solution.

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“…To our case, our parameter a seems to 'mimic' the effects brought about by these ones. Additionally, a similar behavior is seen for the shadows as well [160].…”

Section: Shadowssupporting

confidence: 70%

Analysis of a regular black hole in Verlinde’s gravity

Araújo Filho

2023

Class. Quantum Grav.

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“…where the + ve (-ve) signature in the (44) corresponding to the ingoing (outgoing) wave at the ∞. We use the second-order WKB approximation to study the QNMs and QNFs of the obtained black hole solution 19 The WKB relation is [93][94][95][96][97][98][99]…”

Section: Dynamic Stability: Quasinormal Modesmentioning

confidence: 99%

“…where V 0 is the height of the barrier and V ″ 0 is the second derivative of the potential concerning the tortoise coordinate. We use the WKB formula in large l limit [93][94][95][96][97][98][99] to obtain QNFs. The numerical value of QNM and QNF for different values of graviton mass is depicted in table 4.…”

Section: Dynamic Stability: Quasinormal Modesmentioning

confidence: 99%

Thermodynamics, phase structure and quasinormal modes for AdS Heyward massive black hole

Singh,

Veer Singh,

Kumar Singh

2024

Phys. Scr.

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In this paper, we find the new exact $AdS$ black hole (BH) solution in the presence of massive gravity and nonlinear electrodynamics (NED). The obtained black hole solution (known as $AdS$ Heyward massive BH ) interpolates with the $AdS$ Heyward BH in the absence of graviton mass ($m$) and massive BH when the magnetic charge is switched off. We calculate the exact expression of thermodynamics quantities including local (heat capacity), global (free energy), and dynamical stability (quasinormal modes) of the obtained BH solution. The heat capacity of the BH diverges where the temperature is maximum and free energy is minimum. We also study the extended thermodynamics of the BH when the cosmological constant ($\Lambda$) is treated as the thermodynamics pressure ($P=-\Lambda/8\pi$). We analyze the first and second-order phase transition by studying the behavior of Gibbs free energy and these phase transitions are similar to the van der Walls phase transition. The effect of magnetic charge and graviton mass are opposite to each other on critical values.

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“…The significance of this issue is in general to reach the relationship between gravitational waves and shadows of black holes, the two amazing achievements in the new century. The study connecting the real part of the QNMs and the shadow radius has been explored for the static [125,126] and the rotating spacetime [127] and has been also applied to different black holes [128][129][130][131].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and optical properties of phantom AdS black holes in massive gravity

Jafarzade,

Eslam Panah,

Rodrigues

2024

Class. Quantum Grav.

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Motivated by high interest in Lorentz invariant massive gravity models known as dRGT massive gravity, we present an exact phantom black hole solution in this theory of gravity and discuss the thermodynamic structure of the black hole in the canonical ensemble. Calculating the conserved and thermodynamic quantities, we check the validity of the first law of thermodynamics and the Smarrrelation in the extended phase space. In addition, we investigate both the local and global stability of these black holes and show how massive parameters affect the regions of stability. We extend our study to investigate the optical features of the black holes such as the shadow geometrical shape, energy emission rate, and deflection angle. Also, we discuss how these optical quantities are affectedby massive coefficients. Finally, we consider a massive scalar perturbation minimally coupled to the background geometry of the black hole and examine the quasinormal modes by employing the WKB approximation.

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Quasinormal modes, shadow and thermodynamics of black holes coupled with nonlinear electrodynamics and cloud of strings

Cited by 18 publications

References 53 publications

Analysis of a regular black hole in Verlinde’s gravity

Analysis of a regular black hole in Verlinde’s gravity

Thermodynamics, phase structure and quasinormal modes for AdS Heyward massive black hole

Thermodynamics and optical properties of phantom AdS black holes in massive gravity

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