Search
Now showing items 21-29 of 29
Three-dimensional modeling of cosmic rays observed by PAMELA
(North-West University (South Africa), 2022)
"Abstract not copied"
Aspects of the time-dependent modulation of galactic cosmic rays throughout a three-dimensional heliosphere
(North-West University (South Africa), 2021)
A dominant feature in the heliosphere is the heliospheric current sheet, separating regions of opposite
polarity of the heliospheric magnetic field. This structure is dependent on solar activity through the tilt
angle, ...
Modeling of galactic cosmic rays in the heliosphere
(2015)
The modulation of galactic cosmic ray (GCR) Carbon in a north-south asymmetrical heliosphere is studied, using a two-dimensional numerical model that contains a solar wind termination shock (TS), a heliosheath, as well as ...
An investigation into a generalized Fisk-type heliospheric magnetic field
(North-West University (South Africa), Potchefstroom Campus, 2016)
The existence of a Fisk-type heliospheric magnetic field (HMF) has been contested since the
Fisk field [Fisk, 1996] challenged the traditional view of the HMF first proposed by Parker
[1958]. Several modifications of the ...
Modelling charge-sign dependent modulation of cosmic rays in the heliosphere
(North-West University (South Africa), 2016)
The solar minimum of cycle 23/24 has seen exceptionally quiet levels of solar activity
and heliospheric modulation, which resulted in the highest cosmic ray (CR) spectrum
ever recorded at Earth in December 2009 by the ...
Millisecond pulsars and pulsar wind nebulae as sources of gamma rays and cosmic rays
(North-West University, 2008)
Our main aim was to implement a fully 3D General Relativistic (GR) frame-dragging polar cap (PC) millisecond pulsar (MSP) model as a numerical code, and constrain it using multiwavelength and cosmic-ray data. We also ...
On the heliospheric diffusion tensor and its effect on 26-day recurrent cosmic-ray variations
(North-West University, 2008)
A first attempt at an ab initio steady-state three-dimensional modulation model for galactic cosmic ray electrons, utilizing expressions adapted from the work of Teufel and Schlickeiser [2003] and Shalchi et al. [2004a] ...
A GPS-based method for pressure corrections to neutron monitor data
(North-West University, 2008)
Galactic cosmic rays are high-energy particles in the heliosphere. When entering the atmosphere of earth, they interact with the nuclei of air molecules, which then cascade down to the earth's surface. The nuclear active ...
The modulation of galactic cosmic rays over a solar cycle
(North-West University (South Africa), 2016)
This work studied the modulation of galactic cosmic rays in the heliosphere by using a well-established,
time dependent numerical modulation model to calculate cosmic ray transport
inside the heliosphere over a solar ...