Braneworld‐Klein‐Gordon System in the Framework of Gravitational Decoupling

León, P.; Sotomayor, A.

doi:10.1002/prop.202100017

Cited by 16 publications

(2 citation statements)

References 150 publications

(157 reference statements)

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“…In this connection some pioneering works on gravitational decoupling can been seen in refs. [52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69].…”

Section: Jcap10(2022)003mentioning

confidence: 99%

Exploring physical properties of minimally deformed strange star model and constraints on maximum mass limit in f(𝒬) gravity

Maurya

Mustafa

Govender

et al. 2022

J. Cosmol. Astropart. Phys.

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Our current investigation is inherently linked to the observations of gravitational waves from the GW190814 event which suggests that the source of the signals can be ascribed to a compact binary coalescence of a 22.2 to 24.3M ⊙ black hole and a compact object endowed with a mass of 2.50 to 2.67M ⊙. In the current exposition, we are concerned with modeling of the lower mass component of the coalescence pair. We utilize the f(𝒬) gravity together with the Minimal Geometric Deformation (MGD) technique to obtain compact stellar objects with masses aligned with the GW190814 event. Starting off with the Tolman IV ansatz for one of the metric functions, together with an MIT Bag model equation of state we are able to reduce the problem of fully describing the gravitational behavior of the seed solution to a quadrature. Through the MGD technique, we introduce anisotropy by deforming the radial part of the gravitational potential. This enables us to obtain two new classes of solutions which depend on the metricity parameter, 𝒬 and the deformation constant, β. We show that these two parameters play a crucial role in determining the thermodynamical behavior and stability of our models. In particular, we show that the interplay between the metricity parameter and the deformation constant predicts the mass of the progenitor articulating as the secondary component of GW190814.

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“…In this connection some pioneering works on gravitational decoupling can been seen in refs. [52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69].…”

Section: Jcap10(2022)003mentioning

confidence: 99%

Exploring physical properties of minimally deformed strange star model and constraints on maximum mass limit in f(𝒬) gravity

Maurya

Mustafa

Govender

et al. 2022

J. Cosmol. Astropart. Phys.

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“…To do so, one can adopt different strategies [33][34][35] (for further details see articles therein). The versatility of this novel scheme has been extended to explore compact starts in higher dimensions [36], complexity factor of self-gravitating systems [37][38][39][40][41][42][43][44][45][46], energy exchange [47,48], braneworld coupled to a Klein-Gordon scalar field [49], spherical static objects in isotropic coordinates [50], Dirac [51] and Yang-mills-Dirac stars [52], superfluid stars [53], MGD with trace and Weyl anomalies [54], generalized Horndeski hybrid stars [55], Holographic entanglement entropy in AdS/QCD [56], modified gravity theories such as f (R) [57] and f (R, T) [58], to name a few. In a more widely context, this approach was spread to include deformations on both metric potentials [59].…”

Section: Introductionmentioning

confidence: 99%

Charged compact objects by e–MGD approach

Azmat¹,

Tello‐Ortiz²,

Zubair³

et al. 2022

Phys. Scr.

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In this work, we analyze the incidence of gravitational decoupling through the extended minimal geometric deformation (e–MGD) approach in the framework of f(R, T ) gravity theory, applying it on a spherically symmetric and static charged isotropic matter distribution. Speciﬁcally, the well– known Krori–Barua toy model is translated to an anisotropic domain by deforming the complete space–time. To do so, the so–called θ–sector has been solved by using the mimic constraint for the radial pressure and a general equation of state relating the components of the θµνsource. A thoroughly study on the main salient features of the output such as density, radial pressure, transverse pressure and anisotropy factor is performed to check the feasibility of the model, in order to determine whether this structure can represent real celestial bodies such as neutron stars. Furthermore, the consequences of e–MGD on some relevant astrophysical parameters, that is, the total mass M, gravitational redshift z and time dilation dτ around the object are explored. It is found that the maximum mass provided by this toy model is M = 2.506M⊙, corresponding to the massive neutron stars.

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Anisotropic Strange Star Model Beyond Standard Maximum Mass Limit by Gravitational Decoupling in f(Q)$f(Q)$ Gravity

Maurya

Singh

Lohakare

et al. 2022

Fortschritte der Physik

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The current theoretical development identified as the gravitational decoupling via Complete Geometric Deformation (CGD) method that has been introduced to explore the nonmetricity Q effects in relativistic astrophysics. In the present work, we have investigated the gravitationally decoupled anisotropic solutions for the strange stars in the framework of ffalse(Qfalse)$f(Q)$ gravity by utilizing the CGD technique. To do this, we started with Tolman metric ansatz along with the MIT Bag model equation of state related to the hadronic matter. The solutions of the governing equations of motions are obtained by using two approaches, namely the mimicking of the θ sector to the seed radial pressure and energy density of the fluid model. The obtained models describe the self‐gravitating static, compact objects whose exterior solution can be given by the vacuum Schwarzschild Anti‐de Sitter spacetime. In particular, we modeled five stellar candidates, viz., LMC X‐4, PSR J1614‐2230, PSR J0740+6620, GW190814, and GW 170817 by using observational data. The rigorous viability tests of the solutions have been performed through regularity and stability conditions. We observed that the nonmetricity parameter and decoupling constant show a significant effect on stabilizing to ensure the physically realizable stellar models. The innovative feature of this work is to present the stable compact objects with masses beyond the 2M⊙$2 M_{\odot }$ without engaging of exotic matter. Therefore, the present study shows a new perception and physical significance about the exploration of ultra‐compact astrophysical objects.

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Braneworld‐Klein‐Gordon System in the Framework of Gravitational Decoupling

Cited by 16 publications

References 150 publications

Exploring physical properties of minimally deformed strange star model and constraints on maximum mass limit in f(𝒬) gravity

Exploring physical properties of minimally deformed strange star model and constraints on maximum mass limit in f(𝒬) gravity

Charged compact objects by e–MGD approach

Anisotropic Strange Star Model Beyond Standard Maximum Mass Limit by Gravitational Decoupling in f(Q)$f(Q)$ Gravity

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