Theoretical interpretation of cosmic magnetic fields

Mikhail, F. I.; Wanas, M. I.; Eid, A.

doi:10.1007/bf00984977

Cited by 19 publications

(27 citation statements)

References 17 publications

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“…All geometric elements, used to describe gravitational and electromagnetic quantities, are derived directly from the geometric structure used. The theory has been applied to spherically symmetric cases [4], [5], [6]. The solutions obtained, so far, were found to be in agreement with previously known results, under some limiting (particular) conditions.…”

Section: Introductionsupporting

confidence: 82%

“…The suggested scheme has shown its advantages in several applications (cf. [5], [6], [12]& [14]). The type of the space, under consideration, is written in two parts: The first is one of the codes written in the first three rows of table 3, carrying information about the capability of an AP-structure to represent electromagnetic fields.…”

Section: Physical Interpretationmentioning

confidence: 99%

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On the Relation Between Mass and Charge: A Pure Geometric Approach

Wanas

2007

Int. J. Geom. Methods Mod. Phys.

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A new solution of the field equations of the generalized field theory, constructed by Mikhail and Wanas in 1977, has been obtained. The geometric structure used, in the present application, is an absolute parallelism (AP)-space with spherical symmetry (type FIGI). The solution obtained represents a generalized field outside a charged massive central body. Two schemes have been used to get the physical meaning of the solution: The first is related to the metric of the Riemannian space associated with the AP-structure. The second is connected to a covariant scheme known as Type Analysis. It is shown that the dependence on both schemes for interpreting the results obtained, is more better than the dependence on the metric of the Riemannian space associated with the AP-structure.In General, if we consider the solution obtained as representing a geometric model for an elementary charged particle, then the results of the present work can be summarized in the following points. (i) It is shown that the mass of the particle is made of two contributions: The first is the gravitational contribution, and the second is the contribution due to the existence of charge.(ii) The model allows for the existence of a charged particle whose mass is completely electromagnetic in origin. (iii) The model prevents the existence of a charged massless particle. (iv) The electromagnetic contribution, to the mass, is independent of the sign of the electric charge. (v) It is shown that the mass of the electron (or a positron) is purely made of its charge.

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Section: Introductionsupporting

confidence: 82%

Section: Physical Interpretationmentioning

confidence: 99%

On the Relation Between Mass and Charge: A Pure Geometric Approach

Wanas

2007

Int. J. Geom. Methods Mod. Phys.

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“…We are going to use the infinitesimal transformation 16) where η is the small parameter, mentioned above, whose square and higher orders can be neglected. Now, we calculateλ i µ in terms of λ i µ using two methods.…”

Section: An Integral Identitymentioning

confidence: 99%

Spacetime Structure and Electromagnetism

Wanas

Ammar

2010

Mod. Phys. Lett. A

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Two Lagrangian functions are used to construct geometric field theories. One of these Lagrangians depends on the curvature of space, while the other depends on curvature and torsion. It is shown that the theory constructed from the first Lagrangian gives rise to pure gravity, while the theory constructed using the second Lagrangian gives rise to both gravity and electromagnetism. The two theories are constructed in a version of absolute parallelism geometry in which both curvature and torsion are, simultaneously, nonvanishing. One single geometric object, W-tensor, reflecting the properties of curvature and torsion, is defined in this version and is used to construct the second theory. The main conclusion is that a necessary condition for geometric representation of electromagnetism is the presence of a nonvanishing torsion in the geometry used.

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“…Because of the independence of h a , the determinant h := det(h a µ ) is nonzero. However, the vielbein space is equipped with many connections [17][18][19][20], on a teleparallel space (M, h a ), there exists a unique linear connection, namely Weitzenböck connection, with respect to which the parallelization vector fields h a are parallel. This connection is given by…”

Section: A Teleparallel Spacementioning

confidence: 99%

The hidden flat like universe II

Hanafy

Nashed

2016

Astrophys Space Sci

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In a recent work, a particular class of f (T ) gravity, where T is the teleparallel torsion scalar, has been derived. This class has been identified by flat-like universe (FLU) assumptions [1]. The model is consistent with the early cosmic inflation epoch. A quintessence potential has been constructed from the FLU f (T )-gravity. We show that the first order potential of the induced quintessence is a quasi inverse power law inflation with an additional constant providing an end of the inflation with no need to an extra mechanism. At e-folds N * = 55 before the end of the inflation, this type of potential can perform both E and B modes of the cosmic microwave background (CMB) polarization pattern.

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Theoretical interpretation of cosmic magnetic fields

Cited by 19 publications

References 17 publications

On the Relation Between Mass and Charge: A Pure Geometric Approach

On the Relation Between Mass and Charge: A Pure Geometric Approach

Spacetime Structure and Electromagnetism

The hidden flat like universe II

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