North-South anisotropy during the quasi-stationary modulation of galactic cosmic rays.
Abstract
High-speed solar-wind streams coming from coronal holes produce, in the interplanetary space, a quasi-stationary modulation of galactic cosmic rays. The Rome cosmic-ray group has analysed this modulation taking into account not only the charged-particle isotropic intensity but also the North-South anisotropy (ANS), derived from ground-based measurements. The obtained results for the period October 1964 - December 1987 are summarized. Data from the Bartels solar rotation No. 2034 (May 23 - June 18, 1982) are used to illustrate the ANS phenomenology.
- Publication:
-
Nuovo Cimento C Geophysics Space Physics C
- Pub Date:
- October 1992
- DOI:
- 10.1007/BF02507827
- Bibcode:
- 1992NCimC..15..527S
- Keywords:
-
- Anisotropy;
- Coronal Holes;
- Galactic Cosmic Rays;
- Interplanetary Space;
- Modulation;
- Solar Wind Velocity;
- Charged Particles;
- Nucleonics