Distribution of tensor anisotropy of cosmic rays near the neutral current sheet-Reference-Cited by-同舟云学术

Distribution of tensor anisotropy of cosmic rays near the neutral current sheet

Published:2017-08-09 Issue:2 Volume:3 Page:16-19
ISSN:2500-0535
Container-title:Solar-Terrestrial Physics
language:en
Short-container-title:

Author:

Гололобов Петр¹,Gololobov Peter²,Кривошапкин Прокопий¹,Krivoshapkin Prokopy²,Крымский Гермоген¹,Krymsky Germogen²,Григорьев Владислав¹,Grigoryev Vladislav²,Герасимова Сардаана¹,Gerasimova Sardaana²

Affiliation:

1. Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН

2. Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS

Abstract

We analyze time profiles of isotropic intensity, components of vector and tensor anisotropies of cos-mic rays (CR) when Earth crosses the neutral sheet of the interplanetary magnetic field (IMF) in solar activity cycles 23–24. The moments of the crossings are de-termined from Wilcox Observatory synoptic charts and IMF data. Periods of Forbush decreases and ground level enhancements are excluded from the analysis. The events are analyzed for the epochs of positive and negative signs of the Sun’s general magnetic field. During each epoch, the crossings from the positive sector to the negative one and vice versa are separated. In total, 213 crossing events have been selected. The first two spherical harmonics of the angular CR-distribution are obtained using the global survey method. In each case, the average number of stations is equal to 32. The analysis shows that the temporal change of the isotropic component is caused by a magnetic mirror. For the first time, the zonal harmonics are reliably distinguished, and the existence of the antisymmetric diurnal CR-variation in a low energy range, which is oriented along IMF, is recognized. We compare our results with those obtained earlier.

Publisher

Infra-M Academic Publishing House

Subject

Space and Planetary Science,Atmospheric Science,Geophysics

Reference8 articles.

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