Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012apj...745..151p&link_type=abstract
The Astrophysical Journal, Volume 745, Issue 2, article id. 151 (2012).
Astronomy and Astrophysics
Astronomy
Acceleration Of Particles, Magnetohydrodynamics: Mhd, Methods: Numerical, Shock Waves, Solar Wind, Sun: Coronal Mass Ejections: Cmes
Scientific paper
One of the challenges in constructing global magnetohydrodynamic (MHD) models of the inner heliosphere for, e.g., space weather forecasting purposes, is to correctly capture the acceleration and expansion of the solar wind. In current models, various ad hoc heating prescriptions are introduced in order to obtain a realistic steady-state solar wind solution. In this work, we demonstrate, by performing MHD simulations of erupting coronal mass ejections (CMEs) on identical solar wind solutions employing different heating formulations, that the dynamics and properties of the CME-driven shocks are significantly altered depending on the applied heating prescription. Furthermore, we show how two popular heating formulations can be altered so as to yield shock properties consistent with theory and available coronal shock observations.
Pomoell Jens
Vainio Rami
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