Numerical simulation of inertial alfven waves to study localized structures and spectral index in auroral region

被引：3

作者：

Jatav, Bheem Singh ^{[1
]}

机构：

[1] Sikkim Univ, Dept Phys, Gangtok 737101, Sikkim, India

来源：

JOURNAL OF ASTROPHYSICS AND ASTRONOMY | 2018年 / 39卷 / 03期

关键词：

Inertial Alfven wave; aurora; plasma; NONLINEAR-INTERACTION; DENSITY; PLASMAS; ACCELERATION; CAVITATION; MODULATION; EXISTENCE; DYNAMICS;

D O I：

10.1007/s12036-018-9531-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the present paper, the numerical simulation of Inertial Alfven wave (IAW) in low- plasma applicable to the auroral region at 1700 km was studied. It leads to the formation of localized structures when the nonlinearity arises due to ponderomotive effect and Joule heating. The effect of perturbation and magnitude of pump IAW, formed the localized structures of magnetic field, has been studied. The formed localized structures at different times and average spectral index scaling of power spectrum have been observed. Results obtained from simulation reveal that spectrum steepens with power law index for shorter wavelength. These localized structures could be a source of particle acceleration and heating by pump IAW in low- plasma.

引用

页数：6

共 39 条

[31] Small scale Alfvenic structure in the aurora [J].

Stasiewicz, K ;

Bellan, P ;

Chaston, C ;

Kletzing, C ;

Lysak, R ;

Maggs, J ;

Pokhotelov, O ;

Seyler, C ;

Shukla, P ;

Stenflo, L ;

Streltsov, A ;

Wahlund, JE .

SPACE SCIENCE REVIEWS, 2000, 92 (3-4) :423-533

[32] Dissipation in turbulent plasma due to reconnection in thin current sheets [J].

Sundkvist, David ;

Retino, Alessandro ;

Vaivads, Andris ;

Bale, Stuart D. .

PHYSICAL REVIEW LETTERS, 2007, 99 (02)

[33] Dynamics of Alfven waves in tokamaks [J].

Vlad, G ;

Zonca, F ;

Briguglio, S .

RIVISTA DEL NUOVO CIMENTO, 1999, 22 (07) :1-97

[34] Cross-scale nonlinear coupling and plasma energization by Alfven waves [J].

Voitenko, Y ;

Goossens, M .

PHYSICAL REVIEW LETTERS, 2005, 94 (13)

[35] Nonlinear interaction of minor heavy ions with kinetic Alfven waves and their anisotropic energization in coronal holes [J].

Wu, D. J. ;

Yang, L. .

ASTROPHYSICAL JOURNAL, 2007, 659 (02) :1693-1701

[36] Dipole density solitons and solitary dipole vortices in an inhomogeneous space plasma [J].

Wu, DJ ;

Huang, GL ;

Wang, DY .

PHYSICAL REVIEW LETTERS, 1996, 77 (21) :4346-4349

[37]

ZAKHAROV VE, 1972, SOV PHYS JETP-USSR, V34, P62

[38] SCALAR AND VECTOR NONLINEAR DECAYS OF LOW-FREQUENCY ALFVEN WAVES [J].

Zhao, J. S. ;

Voitenko, Y. ;

De Keyser, J. ;

Wu, D. J. .

ASTROPHYSICAL JOURNAL, 2015, 799 (02)

[39]

Zhou C., 1994, PHYS REV LETT, V50, P5

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