Unstable density distribution associated with equatorial plasma bubble

Autor(es)

Kherani, E. A. ^[1] ; Bharuthram, R. ^[2] ; Singh, S. ^{[2, 3]} ; Lakhina, G. S. ^{[2, 3]} ; de Meneses, F. Carlos ^[1]

Afiliação do(s) autor(es)

^[1] Inst Nacl Pesquisas Espaciais, Sao Paulo - Brazil

^[2] Univ Western Cape, ZA-7535 Bellville - South Africa

^[3] Indian Inst Geomagnetism, Bombay, Maharashtra - India

• Tipo de documento: Artigo Científico
• Fonte: Physics of Plasmas; v. 23, n. 4 APR 2016.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 11/21903-3 - Distúrbios ionosféricos viajantes: simulação e observação, a importância de latitudinal de acoplamento de ondas gravidade-instabilidades Perkins-Es-layer e de forçando desde a pré-sísmica eventos
• Beneficiário: Esfhan Alam Kherani
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores