The anisotropies of Galactic cosmic rays: 3-Dimensional modeling

J. Kóta; J. R. Jokipii

doi:10.1016/S0273-1177(01)00086-2

The anisotropies of Galactic cosmic rays: 3-Dimensional modeling

J. Kóta, J. R. Jokipii

Lunar and Planetary Lab

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We report on model calculations for the anisotropies of galactic cosmic rays at the orbit of the Earth. We consider the 5 - 25 GV range where the diffusion approximation is still applicable. The predicted ecliptic and North-South components of the anisotropy in various 2-dimensional (2-D) and 3-dimensional (3-D) models are discussed. Our 3-D numerical code, including large-scale particle drifts in a model heliosphere with a wavy current sheet and corotating interaction regions (CIRs), is extended to calculate anisotropies. Simulation results obtained for the two opposite magnetic cycles are presented for 3-D models with uniform solar wind speed as well as for those with CIRs included. Recurrent 27-day variations are discussed.

Original language	English (US)
Pages (from-to)	607-612
Number of pages	6
Journal	Advances in Space Research
Volume	27
Issue number	3
DOIs	https://doi.org/10.1016/S0273-1177(01)00086-2
State	Published - 2001

ASJC Scopus subject areas

Aerospace Engineering
Astronomy and Astrophysics
Geophysics
Atmospheric Science
Space and Planetary Science
General Earth and Planetary Sciences

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10.1016/S0273-1177(01)00086-2

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title = "The anisotropies of Galactic cosmic rays: 3-Dimensional modeling",

abstract = "We report on model calculations for the anisotropies of galactic cosmic rays at the orbit of the Earth. We consider the 5 - 25 GV range where the diffusion approximation is still applicable. The predicted ecliptic and North-South components of the anisotropy in various 2-dimensional (2-D) and 3-dimensional (3-D) models are discussed. Our 3-D numerical code, including large-scale particle drifts in a model heliosphere with a wavy current sheet and corotating interaction regions (CIRs), is extended to calculate anisotropies. Simulation results obtained for the two opposite magnetic cycles are presented for 3-D models with uniform solar wind speed as well as for those with CIRs included. Recurrent 27-day variations are discussed.",

author = "J. K{\'o}ta and Jokipii, {J. R.}",

note = "Funding Information: This work has been supported by NASA under grant NAG5 9616547. Funding Information: by NSF under grant ATM",

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T1 - The anisotropies of Galactic cosmic rays

T2 - 3-Dimensional modeling

AU - Kóta, J.

AU - Jokipii, J. R.

N1 - Funding Information: This work has been supported by NASA under grant NAG5 9616547. Funding Information: by NSF under grant ATM

PY - 2001

Y1 - 2001

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AB - We report on model calculations for the anisotropies of galactic cosmic rays at the orbit of the Earth. We consider the 5 - 25 GV range where the diffusion approximation is still applicable. The predicted ecliptic and North-South components of the anisotropy in various 2-dimensional (2-D) and 3-dimensional (3-D) models are discussed. Our 3-D numerical code, including large-scale particle drifts in a model heliosphere with a wavy current sheet and corotating interaction regions (CIRs), is extended to calculate anisotropies. Simulation results obtained for the two opposite magnetic cycles are presented for 3-D models with uniform solar wind speed as well as for those with CIRs included. Recurrent 27-day variations are discussed.

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The anisotropies of Galactic cosmic rays: 3-Dimensional modeling

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