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Paper: Modeling the Global Heliosphere Using IPS-derived Time-dependent Boundary Conditions
Volume: 484, Outstanding Problems in Heliophysics: From Coronal Heating to the Edge of the Heliosphere
Page: 91
Authors: Kim, T. K.; Pogorelov, N. V.; Borovikov, S. N.; Hayashi, K.; Jackson, B. V.; Tokumaru, M.; Yu, H.
Abstract: Interplanetary scintillation (IPS) observations are a well-known, powerful tool that has long been used in solar wind (SW) forecasting. In the last couple of decades, several tomography methods have been developed to reconstruct the time-varying three-dimensional SW structure from IPS observations with reasonably good accuracy out to several astronomical units beyond Earth's orbit. With some of these tomographic reconstructions at certain fixed heliocentric distances as time-dependent boundary conditions, we have simulated the plasma flow in the inner heliosphere magnetohydrodynamically (MHD) and in the outer heliosphere using an MHD-neutral model. Since the SW structure often changes significantly in time, the accuracy of the boundary conditions is particularly important in modeling the SW outflow in interplanetary space and the interaction between the SW and the local interstellar medium at the edge of the heliosphere. In this paper, we summarize our past and current efforts in modeling the global heliosphere using IPS-based time-varying boundary conditions and discuss how we may improve the accuracy of our SW reconstructions.
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