Analyzing non-thermal steady solar plasmas in the κ-modified polytropic GES model framework
Abstract
The gravito-electrostatic sheath (GES) model, originally formulated to see the surface origin of solar wind plasma (SWP) originating from the solar interior plasma (SIP) through the quasi-linear coupling non-rigid solar surface boundary (SSB), is revisited. The model genesis is the application of laboratory plasma-wall coupling and cross-border effects on the astrophysical spatiotemporal scales. In this investigation, we consider the non-thermal (κ-distributed) electrons and inertial ions as the constitutive fluids of the entire solar plasma system. It is under the action of magnetic field in a turbulent background describable with the Larson logabarotropic law in spherical geometry. The structuring equations for both the SIP and SWP scales are methodologically developed. It includes a new type of κ-modified polytropic equation of state constructed herein for the first time. A numerical illustrative platform is presented to characterize the new κ-polytropic GES structure formation and subsequent evolution. The reliability of our model study is validated on the grounds that the new SSB is formed at a heliocentric radial distance of 3.5 (on Jeans scale) for the thermal (Boltzmannian) electrons, which exactly matches the previous GES prediction. It is interesting to see that the SSB location gradually shifts radially inward with reduced non-thermality index (κ), and so forth. The new solar plasma potential, flow and other relevant characteristics are analyzed elaborately. The applicability of the results in the real solar plasma environs is lastly indicated concisely.
- Publication:
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Journal of Astrophysics and Astronomy
- Pub Date:
- December 2022
- DOI:
- 10.1007/s12036-022-09828-5
- Bibcode:
- 2022JApA...43...46S
- Keywords:
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- Sun;
- GES model;
- solar plasma;
- solar wind;
- non-thermality