A generalized AZ-non-Maxwellian velocity distribution function for space plasmas

被引：29

作者：

Abid, A. A. ^{[1
]}

Khan, M. Z. ^{[2
]}

Lu, Quanming ^{[1
]}

Yap, S. L. ^{[3
]}

机构：

[1] Univ Sci & Technol China, Dept Geophys & Planetary Sci, CAS Key Lab Geospace Environm, Hefei 23006, Peoples R China

[2] Fed Urdu Univ Arts Sci & Technol, Dept Appl Phys, Islamabad 44000, Pakistan

[3] Univ Malaya, Dept Phys, Plasma Technol Res Ctr, Fac Sci, Kuala Lumpur 50603, Malaysia

来源：

PHYSICS OF PLASMAS | 2017年 / 24卷 / 03期

关键词：

DOUBLE-LAYERS; DUST GRAINS; NONEXTENSIVITY; SYSTEMS;

D O I：

10.1063/1.4977447

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A more generalized form of the non-Maxwellian distribution function, i.e., the AZ-distribution function is presented. Its fundamental properties are numerically observed by the variation of three parameters: a (rate of energetic particles on the shoulder), r (energetic particles on a broad shoulder), and q (superthermality on the tail of the velocity distribution curve of the plasma species). It has been observed that (i) the AZ-distribution function reduces to thedr; q-distribution for alpha -> 0; (ii) the AZ-distribution function reduces to the q-distribution for alpha -> 0; and r -> 0; (iii) the AZ-distribution reduces to Cairns-distribution function for r -> 0; and q -> infinity; (iv) the AZ-distribution reduces to Vasyliunas Cairns distribution for r -> 0; and q = k + 1; (v) the AZ-distribution reduces to kappa distribution for alpha -> 0, r -> 0, and q = k + 1; and (vi) finally, the AZ-distribution reduces to Maxwellian distribution for alpha -> 0; r -> 0, and q -> infinity. The uses of this more generalized AZ-distribution function in various space plasmas are briefly discussed.

引用

页数：5

共 37 条

[1] Dust charging processes with a Cairns-Tsallis distribution function with negative ions [J].