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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Unstable density distribution associated with equatorial plasma bubble

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Author(s):
Kherani, E. A. [1] ; Bharuthram, R. [2] ; Singh, S. [2, 3] ; Lakhina, G. S. [2, 3] ; de Meneses, F. Carlos [1]
Total Authors: 5
Affiliation:
[1] Inst Nacl Pesquisas Espaciais, Sao Paulo - Brazil
[2] Univ Western Cape, ZA-7535 Bellville - South Africa
[3] Indian Inst Geomagnetism, Bombay, Maharashtra - India
Total Affiliations: 3
Document type: Journal article
Source: Physics of Plasmas; v. 23, n. 4 APR 2016.
Web of Science Citations: 1
Abstract

In this work, we present a simulation study of equatorial plasma bubble (EPB) in the evening time ionosphere. The fluid simulation is performed with a high grid resolution, enabling us to probe the steepened updrafting density structures inside EPB. Inside the density depletion that eventually evolves as EPB, both density and updraft are functions of space from which the density as implicit function of updraft velocity or the density distribution function is constructed. In the present study, this distribution function and the corresponding probability distribution function are found to evolve from Maxwellian to non-Maxwellian as the initial small depletion grows to EPB. This non-Maxwellian distribution is of a gentle-bump type, in confirmation with the recently reported distribution within EPB from space-borne measurements that offer favorable condition for small scale kinetic instabilities. (C) 2016 AIP Publishing LLC. (AU)

FAPESP's process: 11/21903-3 - Traveling ionospheric disturbances: simulation and observation, the importance of latitudinal coupling of gravity wave-Perkins-Es layer instabilities and forcing from pre-seismic events
Grantee:Esfhan Alam Kherani
Support Opportunities: Research Grants - Young Investigators Grants