Data Constrained Coronal Mass Ejections in A Global Magnetohydrodynamics Model
Abstract
We present a first-principles-based coronal mass ejection (CME) model suitable for both scientific and operational purposes by combining a global magnetohydrodynamics (MHD) solar wind model with a flux rope-driven CME model. Realistic CME events are simulated self-consistently with high fidelity and forecasting capability by constraining initial flux rope parameters with observational data from GONG, SOHO/LASCO, and STEREO/COR. We automate this process so that minimum manual intervention is required in specifying the CME initial state. With the newly developed data-driven Eruptive Event Generator Gibson-Low (EEGGL), we present a method to derive Gibson-Low (GL) flux rope parameters through a handful of observational quantities so that the modeled CMEs can propagate with the desired CME speeds near the Sun. A test result with CMEs launched with different Carrington rotation magnetograms are shown. Our study shows a promising result for using the first-principles-based MHD global model as a forecasting tool, which is capable of predicting the CME direction of propagation, arrival time, and ICME magnetic field at 1 AU (see companion paper by Jin et al. 2016b).
Keywords
Cite
@article{arxiv.1605.05360,
title = {Data Constrained Coronal Mass Ejections in A Global Magnetohydrodynamics Model},
author = {M. Jin and W. B. Manchester and B. van der Holst and I. Sokolov and G. Toth and R. E. Mullinix and A. Taktakishvili and A. Chulaki and T. I. Gombosi},
journal= {arXiv preprint arXiv:1605.05360},
year = {2017}
}
Comments
30 pages, 7 figures, 3 tables, accepted by ApJ