Features of wave excitation of the electrostatic ion cyclotron type in the auroral ionosphere

• Published in: Cosmic research Vol. 54; no. 1; pp. 52 - 60
• Main Authors: Chernyshov, A. A., Ilyasov, A. A., Mogilevsky, M. M., Golovchanskaya, I. V., Kozelov, B. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.01.2016; Springer Nature B.V
• Subjects: Astronomy; Astrophysics and Astroparticles; Astrophysics and Cosmology; Auroral ionosphere; Auroral zones; Broadband; Cyclotrons; Electric fields; Electric power distribution; Electrostatics; Energy distribution; Flux density; Inhomogeneities; Inhomogeneity; Instability; Ion cyclotron waves; Ionosphere; Ions; Magnetohydrodynamic stability; Mathematical models; Physics; Physics and Astronomy; Plasma; Plasma density; Plasma instabilities; Satellite data; Space Exploration and Astronautics; Space Sciences (including Extraterrestrial Physics; Stability; Wave energy; Wave excitation; Wave power; Cosmic Research; Auroral Zone; Plasma Density; Auroral Region; Weak Electric Field
• ISSN: 0010-9525; 1608-3075
• DOI: 10.1134/S0010952516010044

Broadband electrostatic noise in the auroral ionosphere can be identified as a version of waves of an electrostatic ion cyclotron type, excited by plasma instability resulting from an inhomogeneous distribution of wave energy density. Broadband waves are generated due to both electric field inhomogeneities and plasma density inhomogeneities. The effect of the form of the distribution of electric field and plasma density inhomogeneities on the excitation of instabilities is studied. Also there is shown the role of the characteristic scale of inhomogeneities in the generation of electrostatic ion cyclotron waves due to the development of instability of this kind. The study of these issues, which are important for understanding the processes in the auroral region, is the subject of this paper. The work presents also a comparison of numerical results obtained using both satellite data and model approximations.