Modulated magnetic structure of a nonuniformly stressed FeBO3 single crystal

Sokolov, B. Yu.

doi:10.1134/s0021364006090025

Cited by 8 publications

(10 citation statements)

References 4 publications

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“…In this direction, Bowers and Liang [48] presented one of the first studies based on anisotropic matter distributions. Furthermore, some works predicted that anisotropic matter distributions can occur due to the existence of a solid stellar nucleus, by phase transitions and pion condensation [49], the presence of type IIIA superfluid [50,51], the presence of rotation and electromagnetic field in the system [52][53][54], among others. The model proposed by Heintzmann and Hillebrandt [55] for neutron stars showed that for cases with a large and arbitrary anisotropy there is no mass limit for the stars.…”

Section: Introductionmentioning

confidence: 99%

Charged anisotropic compact objects obeying Karmarkar condition

Gomez-Leyton

Javaid

Rocha³

et al. 2020

Phys. Scr.

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This research develops a well-established analytical solution of the Einstein-Maxwell field equations. We analyze the behavior of a spherically symmetric and static interior driven by a charged anisotropic matter distribution. The class I methodology is used to close the system of equations and a suitable relation between the anisotropy factor and the electric field is imposed. The inner geometry of this toy model is described using an ansatz for the radial metric potential corresponding to the well-known isotropic Buchdahl space-time. The main properties are explored in order to determine if the obtained model is appropriate to represent a real compact body such as neutron or quark star. We have fixed the mass and radii using the data of the compact objects SMC X-1 and LMC X-4. It was found that the electric field and electric charge have magnitudes of the order of ∼ 10 21 [V /cm] and ∼ 10 20 [C], respectively. The magnitude of the electric field and electric charge depends on the dimensionless parameter χ. To observe these effects on the total mass, mass-radius ratio and surface gravitational red-shift, we computed numerical data for different values of χ.

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Section: Introductionmentioning

confidence: 99%

Charged anisotropic compact objects obeying Karmarkar condition

Gomez-Leyton

Javaid

Rocha³

et al. 2020

Phys. Scr.

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“…Anisotropy can be introduced by the existence of a solid stellar core or by the presence of a type-3A superfluid as indicated by Kippenhahn and Weigert [3]. Different kinds of phase transitions [4] or pion condensation [5] can generate anisotropy. Binney and Tremaine [6] have considered anisotropies in spherical galaxies in the context of Newtonian gravitational theory.…”

Section: Introductionmentioning

confidence: 99%

Charged anisotropic matter with a linear equation of state

Thirukkanesh¹,

Maharaj²

2008

Class. Quantum Grav.

214

168

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We consider the general situation of a compact relativistic body with anisotropic pressures in the presence of the electromagnetic field. The equation of state for the matter distribution is linear and may be applied to strange stars with quark matter. Three classes of new exact solutions are found to the Einstein-Maxwell system. This is achieved by specifying a particular form for one of the gravitational potentials and the electric field intensity. We can regain anisotropic and isotropic models from our general class of solution. A physical analysis indicates that the charged solutions describe realistic compact spheres with anisotropic matter distribution. The equation of state is consistent with dark energy stars and charged quark matter distributions. The masses and central densities correspond to realistic stellar objects in the general case when anisotropy and charge are present.

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“…The investigation of properties of anisotropic relativistic stars has received a boost by the subsequent work of [32]. Indeed, anisotropies can arise in many scenarios of a dense matter medium, such as phase transitions [33], pion condensation [34], or in presence of type 3A super-fluid [35]. See also [36][37][38][39] as well as [40][41][42] for more recent works on the topic, and references therein.…”

Section: Introductionmentioning

confidence: 99%

Interior solutions of relativistic stars with anisotropic matter in scale-dependent gravity

2021

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We obtain well behaved interior solutions describing hydrostatic equilibrium of anisotropic relativistic stars in scale-dependent gravity, where Newton’s constant is allowed to vary with the radial coordinate throughout the star. Assuming (1) a linear equation-of-state in the MIT bag model for quark matter, and (2) a certain profile for the energy density, we integrate numerically the generalized structure equations, and we compute the basic properties of the strange quark stars, such as mass, radius and compactness. Finally, we demonstrate that stability criteria as well as the energy conditions are fulfilled. Our results show that a decreasing Newton’s constant throughout the objects leads to slightly more massive and more compact stars.

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Modulated magnetic structure of a nonuniformly stressed FeBO3 single crystal

Cited by 8 publications

References 4 publications

Charged anisotropic compact objects obeying Karmarkar condition

Charged anisotropic compact objects obeying Karmarkar condition

Charged anisotropic matter with a linear equation of state

Interior solutions of relativistic stars with anisotropic matter in scale-dependent gravity

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