Cosmic-Ray Transport in the Presence of a Fisk-type Heliospheric Magnetic Field: Investigating the Influence of Drift
| dc.contributor.author | Troskie, J.S | |
| dc.contributor.author | Engelbrecht, N.E | |
| dc.contributor.author | Steyn, P. J | |
| dc.contributor.researchID | 25261630 | |
| dc.date.accessioned | 2026-01-26T07:46:22Z | |
| dc.date.issued | 2024 | |
| dc.description | Journal Article, Faculty of Natural and Agricultural Sciences, Centre for Space Research (CSR)-- Potchefstroom Campus | |
| dc.description.abstract | Drifts due to the gradients in, and curvatures of, the heliospheric magnetic field (HMF) play a significant role in the transport of galactic cosmic rays (GCRs) in the heliosphere. Although this has been well studied for the Parker HMF, the influence of Fisk-type fields, with their unique geometry, has hitherto received less attention. Here, drift velocity profiles computed for a Schwadron-Parker hybrid field are compared with those for a purely Parkerian field. Furthermore, the influence of this field on GCR modulation, as computed with a 3D, ab initio, modulation model, is investigated. Globally, the differences between the computed intensities are small. Nevertheless, local measures, such as azimuthal variations in the GCR intensities, show a significant influence of the Schwadron-Parker hybrid field on GCR transport. | |
| dc.description.sponsorship | Acknowledgments This work is based on research supported in part by the National Research Foundation of South Africa (NRF grant Nos. 137793, 142146, and TTK2204183656). The opinions expressed and conclusions arrived at are those of the authors and are not necessarily to be attributed to the NRF. The responsibility for the contents of this work is with the authors. The authors would like to thank K.D. Moloto for useful discussions on GCR modulation. Software: Matplotlib (Hunter 2007), NumPy (Harris et al.2020) | |
| dc.identifier.citation | Steyn, P. J. et al. 2024. Cosmic-Ray Transport in the Presence of a Fisk-type Heliospheric Magnetic Field: Investigating the Influence of Drift. The Astrophysical Journal, (2024), 970:144 (13pp),[DOI10.3847/1538-4357/ad517e] | |
| dc.identifier.uri | DOI10.3847/1538-4357/ad517e | |
| dc.identifier.uri | http://hdl.handle.net/10394/45698 | |
| dc.language.iso | en | |
| dc.publisher | The Astrophysical Journal | |
| dc.title | Cosmic-Ray Transport in the Presence of a Fisk-type Heliospheric Magnetic Field: Investigating the Influence of Drift | |
| dc.type | Article |