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Validation of a Wave Heated 3D MHD Coronal-wind Model using Polarized Brightness and EUV Observations

Abstract : The physical properties responsible for the formation and evolution of the corona and heliosphere are still not completely understood. 3D MHD global modeling is a powerful tool to investigate all the possible candidate processes. To fully understand the role of each of them, we need a validation process where the output from the simulations is quantitatively compared to the observational data. In this work, we present the results from our validation process applied to the wave turbulence driven 3D MHD corona-wind model WindPredict-AW. At this stage of the model development, we focus the work to the coronal regime in quiescent condition. We analyze three simulation results, which differ by the boundary values. We use the 3D distributions of density and temperature, output from the simulations at the time of around the first Parker Solar Probe perihelion (during minimum of the solar activity), to synthesize both extreme ultraviolet (EUV) and white-light-polarized (WL pB) images to reproduce the observed solar corona. For these tests, we selected AIA 193 Å, 211 Å, and 171 Å EUV emissions, MLSO K-Cor, and LASCO C2 pB images obtained on 2018 November 6 and 7. We then make quantitative comparisons of the disk and off limb corona. We show that our model is able to produce synthetic images comparable to those of the observed corona.
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Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Thursday, May 19, 2022 - 11:35:17 AM
Last modification on : Friday, August 5, 2022 - 12:01:31 PM


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Susanna Parenti, Victor Réville, Allan Sacha Brun, Rui F. Pinto, Frédéric Auchère, et al.. Validation of a Wave Heated 3D MHD Coronal-wind Model using Polarized Brightness and EUV Observations. The Astrophysical Journal, 2022, 929, ⟨10.3847/1538-4357/ac56da⟩. ⟨insu-03672026⟩



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