Implementing the MULTI-VP coronal model in EUHFORIA: results and comparisons with the WSA coronal model
Evangelia Samara - Royal Observatory of Belgium and KU Leuven; Rui F. Pinto - IRAP, Université de Toulouse and LDE3, CEA Saclay, Université Paris-Saclay, France; Jasmina Magdalenic - Royal Observatory of Belgium, Belgium; Veronika Jercic - KU Leuven, Belgium; Camilla Scolini - KU Leuven and Royal Observatory of Belgium, Belgium; Nicolas Wijsen - KU Leuven, Belgium; Immanuel C. Jebaraj - Royal Observatory of Belgium and KU Leuven, Belgium; Luciano Rodriguez - Royal Observatory of Belgium, Belgium; Stefaan Poedts - KU Leuven and University of Maria Curie-Sklodowska, Belgium
Session: The Solar Sources of Space Weather
The EUropean Heliospheric FORecasting Information Asset (EUHFORIA) is a new 3D magnetohydrodynamic (MHD) space weather prediction tool (Pomoell and Poedts, 2018). EUHFORIA models solar wind and coronal mass ejections (CMEs) all the way from the Sun to 2 AU. It consists of two different spatial domains; the coronal part, which extends from the solar surface to 0.1 AU and the heliospheric part, which covers the spatial domain from 0.1 AU onwards. For the first part, the semi-empirical Wang-Sheeley-Arge (WSA; Arge et al., 2004) model is currently used, in combination with the potential field source surface (PFSS) model (Altschuler and Newkirk, 1969) and the Schatten current sheet (SCS) model (Schatten et al., 1969), in order to reconstruct the magnetic field up to 0.1 AU and produce the necessary boundary conditions required by the 3D MHD heliospheric part to initiate. In the current work, we replace the default WSA model with the MULTI-VP model (Pinto and Rouillard, 2017) and compare their output with EUHFORIA both at 0.1 AU and 1 AU, for high-speed stream cases during the minimum and maximum solar activity. Further comparisons for the cases of interest are made by employing different magnetograms.