On the ordinary mode Weibel instability in space plasmas: A comparison of three-particle distributions

Autor(es)

Rubab, Nazish ^[1] ; Chian, Abraham C. -L. ^{[2, 3, 4, 5]} ; Jatenco-Pereira, Vera ^[6]

Afiliação do(s) autor(es)

^[1] Inst Space & Technol, Dept Space Sci, Islamabad - Pakistan

^[2] Natl Inst Space Res INPE, Sao Jose Dos Campos - Brazil

^[3] Univ Adelaide, Sch Math Sci, Adelaide, SA - Australia

^[4] George Washington Univ, Dept Biomed Engn, Washington, DC - USA

^[5] Inst Aeronaut Technol & World Inst Space Environm, Sao Jose Dos Campos - Brazil

^[6] Univ Sao Paulo, Dept Astron, Geofis & Ciencias Atmosfer IAG USP, Inst Astron, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS; v. 121, n. 3, p. 1874-1885, MAR 2016.
• Citações Web of Science: 2

Resumo

Electromagnetic wave fluctuations driven by temperature anisotropy in plasmas are of interest for solar flare, solar corona, and solar wind studies. We investigate the dispersion characteristics of electromagnetic wave propagating perpendicular to the uniform magnetic field which is derived by using multiple particle distribution functions: Maxwellian, bi-kappa, and product bi-kappa. The presence of temperature anisotropy in which the parallel plasma kinetic energy density exceeding by a sufficient amount can lead to Weibel-like electromagnetic instability. A general description is made to calculate the growth/damping rates of Weibel-like modes when the temperature anisotropy and nonthermalfeatures are associated with these distributions. We demonstrate that for the zeroth cyclotron harmonic, our results for bi-Maxwellian and bi-kappa overlap with each other, while the product bi-kappa distribution shows some dependence on parallel kappa index. For higher harmonics, the growth rates vanish and the damping prevails. (AU)

• Processo FAPESP: 13/10559-5 - Investigação de fenômenos de altas energias e plasmas astrofísicos: teoria, simulações numéricas, observações e desenvolvimento de instrumentação para o Cherenkov Telescope Array (CTA)
• Beneficiário: Elisabete Maria de Gouveia Dal Pino
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais