SPATIAL STRUCTURE OF AZIMUTHALLY SMALL-SCALE MHD WAVES IN ONE-DIMENSIONALLY INHOMOGENEOUS FINITE PRESSURE PLASMA WITH CURVED FIELD LINES
Journal Title: Solar-Terrestrial Physics - Year 2020, Vol 6, Issue 1
Abstract
We have studied propagation of hydromagnetic (MHD) waves in one-dimensionally inhomogeneous finite pressure plasma with curved field lines. Magnetic surfaces are considered to be concentric cylinders, where the cylinder’s radius models the radial coordinate in Earth’s magnetosphere. The waves are supposed to be azimuthally small-scale. In this approximation there are only two MHD modes — Alfvén and slow magnetosonic (SMS). We have derived an ordinary differential equation for the spatial structure of the wave field in this model. We have examined the character of the singularity on the surface of Alfvén and SMS resonances and the influence of field line curvature on them. We have determined wave transparent regions. The SMS transparent region was found to essentially broaden as compared to the straight field line case. The very existence of the Alfvén transparent region is caused by the field line curvature and finite plasma pressure; otherwise, the wave structure is represented by a localized resonance.
Authors and Affiliations
Petrashchuk A. V. , Klimushkin D. Yu.
Keywords
Related Articles
- EP ID EP700051
- DOI 10.12737/stp-61202006
- Views 89
- Downloads 0
A QUIET DAY EMPIRICAL MODEL OF ELECTRON DENSITY IN THE INDIAN EQUATORIAL F-REGION
In this paper, we present a quiet day empirical model of electron density (Ne) for the Indian equatorial zone at an altitude of 500 km. The model is applicable to all levels of solar activity and is based on the observat...
STATISTICAL RELATION OF TRAVELING IONOSPHERIC DISTURBANCES WITH NEUTRAL WIND AND DISTURBANCES IN THE STRATOSPHERE
Using the representative statistics on traveling ionospheric disturbances (TIDs) obtained by Yekaterinburg and Magadan radars, we have shown that distributions of TIDs and average TID velocities by azimuths and local tim...
Solar activity and Earth seismicity
Using the results of continuous long-term observations over 50 years (including solar cycles 20–24), we study the relationship between Earth’s seismicity and solar activity. An increase in the number of strong earthquake...
INFLUENCE OF GEOMAGNETIC DISTURBANCES ON SCINTILLATIONS OF GLONASS AND GPS SIGNALS AS OBSERVED ON THE KOLA PENINSULA
We have compared effects of geomagnetic disturbances during magnetic storms of various types (CME and CIR) and during an isolated substorm on scintillations of GLONASS and GPS signals, using a Septentrio PolaRx5 receiver...
ELECTRON DENSITY IN THE F1 LAYER OVER NORILSK IN 2007–2014
We report the results of the analysis of annual variations in daily electron density (N) for various solar activity conditions — minimum, rise, and maximum (2007–2014) — obtained from digisonde measurements at the ionosp...