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dc.contributor.authorRaath, J.L.
dc.contributor.authorStrauss, R.D.
dc.contributor.authorPotgieter, M.S.
dc.identifier.citationRaath, J.L. et al. 2015. New insights from modeling the neutral heliospheric current sheet. Astrophysics and space science, 360(2): Article no 56. []en_US
dc.identifier.issn1572-946X (Online)
dc.description.abstractRecently, the modulation of cosmic rays in the heliosphere has increasingly been studied by solving the well known transport equation via an approach based on stochastic differential equations. This approach, which is now wellestablished and published, allows for an in depth study of the modulation effects of the wavy heliospheric current sheet, in particular as its waviness increases with solar activity up to extreme maximum conditions. This is possible because of the numerical stability of the approach as well as its ability to trace pseudo-particles so that insightful trajectories of how they respond to the wavy heliospheric current sheet can be computed and displayed. Utilising such a stochastic model, we present valuable new insights into how the geometry of the wavy current sheet can affect the modulation of cosmic rays, especially at the highest levels of solar activity. This enables us to show, from a modeling perspective, why a certain choice for the current sheet profile is more suited than another at these high solar activity levels. We emphasise the importance of an effective tilt angle and illustrate how this concept can be employed effectively in interpreting results pertaining to the wavy current sheet as well as the modulation associated with this important heliospheric structure.en_US
dc.description.sponsorshipNRF and the South African Space Agency (SANSA)en_US
dc.subjectCosmic raysen_US
dc.subjectstochastic differential equationsen_US
dc.subjectcurrent sheeten_US
dc.titleNew insights from modeling the neutral heliospheric current sheeten_US
dc.contributor.researchID20368879 - Raath, Jan-Louis
dc.contributor.researchID13065440 - Strauss, Roelf Du Toit
dc.contributor.researchID10060014 - Potgieter, Marthinus Steenkamp

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