Buchdahl quark stars within f(Q) theory

Sokoliuk, Oleksii; Pradhan, Sneha; Sahoo, P. K.; Baransky, Alexander

doi:10.1140/epjp/s13360-022-03273-7

Cited by 18 publications

(6 citation statements)

References 39 publications

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“…The expression of energy‐momentum tensor is given by [ 36 ] ,

\begin{align} {T}_{0}^{0}=\rho +{\rho}^{D}, \end{align}

\begin{align} {T}_{1}^{1}=-(p+{p}_{r}^{D}), \end{align}

\begin{align} \text{and}\hspace*{3.33333pt}\hspace*{3.33333pt}\hspace*{3.33333pt}{T}_{2}^{2}={T}_{3}^{3}=-(p+{p}_{t}^{D}), \end{align}

\begin{align} {T}_{0}^{1}={T}_{1}^{0}=0. \end{align}

Using all the above expressions, we have the following field equations for dark energy star in

f(Q)

gravity [ 60 ] :

\begin{matrix} κ (ρ + ρ^{D}) & = & \frac{e^{- λ}}{2 r^{2}} [2 r f_{Q Q} Q^{'} false(e^{λ} - 1 false) + f_{Q} (false(e^{λ} - 1 false) false(2 + r ν^{'} \end{matrix}

…”

Section: Ffalse(qfalse)$f(q)$ Gravity and Basic Field Equationsmentioning

confidence: 99%

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Existence of Dark Energy Stars within Lower Mass Gap in the Realm of f(Q)$f(Q)$ Gravity

Bhar

2023

Fortschritte der Physik

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The object of this article is to study a new class of dark energy stars in the background of gravity by using the metric potentials proposed by Krori‐Barua [J. Phys. A, Math. Gen. 8:508 (1975)]. To achieve the goal, a quadratic form of as is taken into account for the static spherically symmetric spacetime,`a' being a coupling parameter of gravity. The maximum allowable masses with corresponding radii have been obtained via plots for and 8. The obtained maximum masses from our analysis are found in the range . For a smaller value of the coupling parameter ‘a’ associated with gravity, more massive stars are found. The radii corresponding to the maximum masses also increase with decreasing ‘a’. In particular, when , the theory can achieve a dark energy star of mass for certain specific combinations of model parameters. This obtained mass is located within a mass in the range of and that can be a lighter object in the GW190814 event detected by LIGO/VIRGO experiments.

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“…The expression of energy‐momentum tensor is given by [ 36 ] ,

\begin{align} {T}_{0}^{0}=\rho +{\rho}^{D}, \end{align}

\begin{align} {T}_{1}^{1}=-(p+{p}_{r}^{D}), \end{align}

\begin{align} \text{and}\hspace*{3.33333pt}\hspace*{3.33333pt}\hspace*{3.33333pt}{T}_{2}^{2}={T}_{3}^{3}=-(p+{p}_{t}^{D}), \end{align}

\begin{align} {T}_{0}^{1}={T}_{1}^{0}=0. \end{align}

Using all the above expressions, we have the following field equations for dark energy star in

f(Q)

gravity [ 60 ] :

\begin{matrix} κ (ρ + ρ^{D}) & = & \frac{e^{- λ}}{2 r^{2}} [2 r f_{Q Q} Q^{'} false(e^{λ} - 1 false) + f_{Q} (false(e^{λ} - 1 false) false(2 + r ν^{'} \end{matrix}

…”

Section: Ffalse(qfalse)$f(q)$ Gravity and Basic Field Equationsmentioning

confidence: 99%

“…Using all the above expressions, we have the following field equations for dark energy star in f (Q) gravity [60] :…”

Section: F (Q) Gravity and Basic Field Equationsmentioning

confidence: 99%

Existence of Dark Energy Stars within Lower Mass Gap in the Realm of f(Q)$f(Q)$ Gravity

Bhar

2023

Fortschritte der Physik

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“…Mandal et al [23] studied the anisotropic compact stars in f (Q) gravity with the quintessence field. In the work [24], researchers have examined the physical behavior of strange stars using the MIT Bag EoS accepting Buchdahl metric for both linear and non-linear models.…”

Section: The Presence Of Event Horizonmentioning

confidence: 99%

Gravastar in the Framework of Symmetric Teleparallel Gravity

Pradhan,

Mandal,

Sahoo

2023

Preprint

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In the current research, we present a novel gravastar model based on the Mazur-Mottola (2004) method with an isotropic matter distribution in f (Q) gravity. The gravastar, a hypothesized substitute for a black hole, is built using the Mazur-Mottola mechanism. This approach allows us to define gravastar as having three stages. The first one is an inner region with negative pressure; the next region is a thin shell that is made up of ultrarelativistic stiff fluid, we have studied proper length, energy, entropy, and surface energy density for this region. Apart from that, we have demonstrated the possible stability of our suggested thin shell gravastar model through the graphical study of surface redshift. Exterior Schwarzschild geometry describes the outer region of the gravastar. In the context of f (Q) gravity, we have discovered analytical solutions for the interior of gravastars that are free of any kind of singularity and the event horizon.

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“…Also, the compact star generated by gravitational decoupling in f (Q) gravity theory has been studied in [67]. Sokoliuk et al have explored the Buchdahl quark stars in the background of f (Q) theory [68]. Recently, wormhole and spherically symmetric configurations have been studied in f (Q) gravity [52,[69][70][71][72][73][74][75][76][77].…”

Section: Introductionmentioning

confidence: 99%

Traversable wormholes satisfying energy conditions in f(Q) gravity

Rastgoo,

Parsaei

2024

Eur. Phys. J. C

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In this article, a new family of asymptotically flat wormhole solutions in the context of symmetric teleparallel gravity, i.e., f(Q) theory of gravity, are presented. Considering a power-law shape function and some different forms of the f(Q) function, we show that a wide variety of wormhole solutions for which the matter fields satisfy some energy conditions, are accessible. We realize that the presence of f(Q) gravity will be enough to sustain a traversable wormhole without exotic matter. The influence of the free parameters of the shape function and the f(Q) models on the energy conditions is investigated. The equation of state and the boundary conditions are analyzed.

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Buchdahl quark stars within f(Q) theory

Cited by 18 publications

References 39 publications

Existence of Dark Energy Stars within Lower Mass Gap in the Realm of f(Q)$f(Q)$ Gravity

Existence of Dark Energy Stars within Lower Mass Gap in the Realm of f(Q)$f(Q)$ Gravity

Gravastar in the Framework of Symmetric Teleparallel Gravity

Traversable wormholes satisfying energy conditions in f(Q) gravity

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