Stability analysis of the Gravito-Electrostatic Sheath-based solar plasma equilibrium

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dc.contributor.author Karmakar, P.K.
dc.contributor.author Goutam, H.P.
dc.contributor.author Lal, M.
dc.contributor.author Dwivedi, C.B.
dc.date.accessioned 2017-11-03T11:56:13Z
dc.date.accessioned 2021-02-12T09:59:14Z
dc.date.available 2017-11-03T11:56:13Z
dc.date.available 2021-02-12T09:59:14Z
dc.date.issued 2016
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, 460, 3, p. 2919–2932, doi: 10.1093/mnras/stw1174 en_US
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/1040
dc.description.abstract We present approximate solutions of non-local linear perturbational analysis for dis- cussing the stability properties of the Gravito-Electrostatic Sheath (GES)-based solar plasma equilibrium, which is indeed non-uniform on both the bounded and unbounded scales. The relevant physical variables undergoing perturbations are the self-solar grav- ity, electrostatic potential and plasma ow along with plasma population density. We methodologically derive linear dispersion relation for the GES fluctuations, and solve it numerically to identify and characterize the existent possible natural normal modes. Three distinct natural normal modes are identfi ed and named as the GES-oscillator mode, GES-wave mode and usual (classical) p-mode. In the solar wind plasma, only the p-mode survives. These modes are found to be linearly unstable in wide-range of the Jeans-normalized wavenumber, k. The local plane-wave approximation marginally limits the validity or reliability of the obtained results in certain radial- and k-domains only. The phase and group velocities, time periods of these uctuation modes are in- vestigated. It is interesting to note that, the oscillation time periods of these modes are 3-10 minutes, which match exactly with those of the observed helio-seismic waves and solar surface oscillations. The proposed GES model provides a novel physical view of the waves and oscillations of the Sun from a new perspective of plasma-wall interaction physics. Due to simpli ed nature of the considered GES equilibrium, it is a neonatal stage to highlight its applicability in the real Sun. The proposed GES model and subsequent fluctuation analysis need further improvements to make it more realistic. en_US
dc.language.iso en en_US
dc.subject Sun interior en_US
dc.subject Sun oscillations en_US
dc.subject Sun en_US
dc.subject Solar wind en_US
dc.subject Sun instabilities en_US
dc.subject Sun hydrodynamics en_US
dc.title Stability analysis of the Gravito-Electrostatic Sheath-based solar plasma equilibrium en_US
dc.type Article en_US
dc.identifier.accession 091582


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