Solar plasma characterization in Kappa (κ)-modified polytropic turbomagnetic GES-model perspective

The gravitoelectrostatic sheath (GES) model for exploring the surface emission mechanism of the solar wind plasma (SWP), transformed from the solar interior plasma (SIP) via the solar surface boundary (SSB), has recently been reformulated in different conditions. It considers the realistic plasma key factors previously remaining unaddressed. This continued study elaborately explores the diverse GES-microphysical features influenced mainly by the plasma non-thermality, bulk polytropicity, magneto-activity, logatropicity, etc. It shows that, in the SIP (SWP), the electric potential is kappa-insensitive, the Mach number is kappa-sensitive, and the current density is kappa-sensitive (insensitive). The Mach number is insensitive and the current density is insensitive (sensitive) to the relative temperature, T-e/T-i, in the SIP (SWP). The inhomogeneity-induced GES properties are illuminated with the gradient-scale behaviours of the relevant physical variables on both SIP and SWP scales. The self-organization of the bi-scaled solar plasma system is well confirmed by mapping the electric and gravity field gradients in a defined colour phase space illustratively alongside reliability check-ups. A judicious application of the newly derived model-structuring equations results in a non-thermally modified form of the equivalent kappa-Bohm sheath criterion featuring the GES formation alongside electric current-flow analyses. Its reliability is validated with a sensible comparison with the extremal cases in fair corroboration with the previous sheath scenarios extensively reported elsewhere. The relevancy of our investigation on the solar multiparametric variations in the GES fabric is lastly bolstered in light of the recent solar astronomic scenarios, such as SolO and PSP.

Automated summary

This article introduces the gravitoelectrostatic sheath (GES) model for exploring the surface emission mechanism of the solar wind plasma. It considers previously unaddressed key factors and explores different GES-microphysical features influenced by plasma characteristics. The study reveals the sensitivity and insensitivity of various parameters in the solar interior plasma and solar wind plasma, and analyzes the inhomogeneity-induced GES properties.