ROLE OF ALPHA PARTICLES IN PENETRATION OF SOLAR WIND DIAMAGNETIC STRUCTURES INTO THE MAGNETOSPHERE
Journal Title: Solar-Terrestrial Physics - Year 2023, Vol 9, Issue 3
Abstract
We present the results of studies showing the presence of simultaneous jumps in the density of protons (N2/N1)p and alpha particles (N2/N1)α at the boundaries of diamagnetic structures (DS) of various types both in the quasi-stationary slow solar wind (SW) and in sporadic SW. For DS of quasi-stationary slow SW, associated with streamer belt or chains, in the statistics considered in the paper there is a single linear dependence of (N2/N1)α on (N2/N1)p. This means that these jumps have the same physical nature and are related to diamagnetism at the boundaries of DS of quasi-stationary SW streams of various types. At the front of interplanetary shock waves (ISW), the (N2/N1)α jump is approximately twice as large as the (N2/N1)p jump. This reflects the features of the collective collisionless plasma heating at ISW fronts and requires further studies. A maximum excess (almost 3 times) of the increase in the alpha-particle density (N2/N1)α over the increase in the proton density (N2/N1)p is observed in eruptive prominences. The magnetospheric response in such phenomena as auroras, proton and alpha particle fluxes, geomagnetic field, and geomagnetic pulsations is similar under the influence of DS of various types and ISW. The detected features of the magnetospheric response to the contact with DS of different types and ISW can be interpreted as impulsive passage of the DS matter (plasmoid) into the magnetosphere. The results of studies of the (N2/N1)α jumps can be used as an additional important argument in identifying cases of impulsive penetration of DS into the magnetosphere and in examining the physical nature of these penetrations.
Authors and Affiliations
Eselevich V. G. , Parhomov V. A.
Keywords
Related Articles
- EP ID EP722175
- DOI 10.12737/stp-93202302
- Views 20
- Downloads 0
RESPONSE OF IONOSPHERIC ELECTRON DENSITY PROFILE TO THE ACTION OF POWERFUL HF RADIO-WAVE RADIATION
Using electron density and temperature equations, we have modeled the dynamics of the electron density profile in the ionosphere due to the expulsion of plasma from localization regions of plasma waves, pumped by high-po...
PECULIARITIES OF ULF WAVE CHARACTERISTICS IN A MULTICOMPONENT IONOSPHERIC PLASMA
We have examined the properties of low-frequency electromagnetic waves in multicomponent ionospheric plasma in the 1–30 Hz band, using the magnetoionic theory. Complex permittivity tensor components and refractive indice...
COMPLEXES OF ACTIVITY ON THE SUN IN SOLAR CYCLE 21
The paper provides statistical data on solar activity complexes (ACs) observed in solar cycle 21. From the synoptic charts for the 1976–1986 sunspot activity, we have detected the regions where the sunspot generation was...
SCALE SEQUENTIALLY CLEAN FOR MINGANTU SPECTRAL RADIOHELIOGRAPH
MingantU SpEctral Radioheliograph (MUSER) is a solar-dedicated radio heliograph, adopting aperture synthesis technique to image the Sun in the frequency range of 0.4 GHz to 15 GHz. MUSER has extremely high spatial resolu...
ESTIMATED RELATIONS BETWEEN THE MAIN THERMOSPHERIC NEUTRAL COMPONENTS AT IONOSPHERIC F1-LAYER HEIGHTS ABOVE IRKUTSK IN 2014–2017
We have estimated seasonal variations in the main thermospheric gas components [O]/[N₂] and [O₂]/[O] for the period 2014–2017. We have used the well-known authoring technique and electron density measurements made with t...