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Journal Articles Open Physics Year : 2021

An analytical model for the Maxwell radiation field in an axially symmetric galaxy

Abstract

The Maxwell radiation field is an essential physical characteristic of a galaxy. Here, an analytical model is built to simulate that field in an axisymmetric galaxy. This analytical model is based on an explicit representation for axisymmetric source-free Maxwell fields. In a previous work, the general applicability of this representation has been proved. The model is adjusted by fitting to it the sum of spherical radiations emitted by the composing ``stars". The huge ratio distance/wavelength needs to implement a numerical precision better than the quadruple precision. The model passes a validation test based on a spherically symmetric solution. The results for a set of ``stars'' representative of a disk galaxy indicate that the field is highest near to the disk axis, and there the axial component of ${\bf E}$ dominates over the radial one. This work will allow us in the future to check if the interaction energy predicted by an alternative theory of gravitation might be a component of dark matter.
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hal-02887969 , version 1 (02-07-2020)
hal-02887969 , version 2 (19-02-2021)

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Mayeul Arminjon. An analytical model for the Maxwell radiation field in an axially symmetric galaxy. Open Physics, 2021, 19, pp. 77-90. ⟨10.1515/phys-2021-0008⟩. ⟨hal-02887969v2⟩

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