Surface tension of strange stars mediated by a color-flavor-locked equation of state

Bogadi, Robert S.; Govender, M.; Moyo, Sibusiso

doi:10.1103/physrevd.102.043026

Cited by 21 publications

(8 citation statements)

References 37 publications

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“…8. Similar plots and comparisons have been found in the literature for linearly approximated EoS's [23] and the more recently pursued CFL EoS [24][25][26]. It is interesting to note that the quadratic EoS mimics the CFL EoS more closely than the linear EoS.…”

Section: Discussionsupporting

confidence: 80%

Stability and improved physical characteristics of relativistic compact objects arising from the quadratic term in $$p_r = \alpha \rho ^2 + \beta \rho - \gamma $$

Thirukkanesh¹,

Bogadi

Govender

et al. 2021

Eur. Phys. J. C

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We investigate the stability and enhancement of the physical characteristics of compact, relativistic objects which follow a quadratic equation of state. To achieve this, we make use of the Vaidya–Tikekar metric potential. This gravitational potential has been shown to be suitable for describing superdense stellar objects. Pressure anisotropy is also a key feature of our model and is shown to play an important role in maintaining stability. Our results show that the combination of the Vaidya–Tikekar gravitational potential used together with the quadratic equation of state provide models which are favourable. In comparison with other equations of state, we have shown that the quadratic equation of state mimics the colour-flavour-locked equation of state more closely than the linear equation of state.

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Section: Discussionsupporting

confidence: 80%

Stability and improved physical characteristics of relativistic compact objects arising from the quadratic term in $$p_r = \alpha \rho ^2 + \beta \rho - \gamma $$

Thirukkanesh¹,

Bogadi

Govender

et al. 2021

Eur. Phys. J. C

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“…The CFL EoS has also been employed to study the surface tension of neutron stars. This study shows that the surface tension is sensitive to the magnitude of the Bag constant [43]. It was observed that larger values of the Bag constant led to stellar models with lower tangential pressures and surface tensions.…”

Section: Introductionmentioning

confidence: 67%

Anisotropic stars via embedding approach in Brans–Dicke gravity

et al. 2021

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In the present article, the solution of the Einstein–Maxwell field equations in the presence of a massive scalar field under the Brans-Dicke (BD) gravity is obtained via embedding approach, which describes a charged anisotropic strange star model. The interior spacetime is described by a spherically symmetric static metric of embedding class I. This reduces the problem to a single-generating function of the metric potential which is chosen by appealing to physics based on regularity at each interior point of the stellar interior. The resulting model is subjected to rigorous physical checks based on stability, causality and regularity for particular object PSR J1903+327. We also show that our solutions describe compact objects such as PSR J1903+327; Cen X-3; EXO 1785-248 and LMC X-4 to an excellent approximation. Novel results of our investigation reveal that the scalar field leads to higher surface charge densities which in turn affects the compactness and upper and lower values imposed by the modified Buchdahl limit for charged stars. Our results also show that the electric field and scalar field which originate from entirely different sources couple to alter physical characteristics such as mass-radius relation and surface redshift of compact objects. This superposition of the electric and scalar fields is enhanced by an increase in the BD coupling constant, $$\omega _{BD}$$ ω BD .

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“…At present, several models have been proposed in existence of a large variety of color superconducting states of quark matter at ultra-high densities, see Ref. [31][32][33] for details. To describe matter in the interior of QSs, we assume the EoS that consists of homogeneous and unpaired, overall electrically neutral, 3-flavor interacting quark matter [34].…”

Section: A Equation-of-statementioning

confidence: 99%

Electrically charged compact stars with an interacting quark equation of state

Panotopoulos,

Tangphati,

Banerjee

2021

Preprint

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We investigate the properties of non-rotating, electrically charged strange quark stars in fourdimensional Einstein-Maxwell theory. For quark matter we adopt the well-motivated quantum chromodynamics (QCD) equation-of-state, while for the charge density we assume it is proportional to the mass density. The system of coupled structure equations are integrated numerically, and we compute the mass, the radius as well as the total electric charge of the stars. Moreover, we perform a detailed numerical study of the effect of electric charge using the interacting quark equation-of-state. We find that stars as heavy as two solar masses can be supported, and that the highest radius and highest mass of the stars increase with the charge density.

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Surface tension of strange stars mediated by a color-flavor-locked equation of state

Cited by 21 publications

References 37 publications

Stability and improved physical characteristics of relativistic compact objects arising from the quadratic term in $$p_r = \alpha \rho ^2 + \beta \rho - \gamma $$

Stability and improved physical characteristics of relativistic compact objects arising from the quadratic term in $$p_r = \alpha \rho ^2 + \beta \rho - \gamma $$

Anisotropic stars via embedding approach in Brans–Dicke gravity

Electrically charged compact stars with an interacting quark equation of state

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