Exploring the Origin of Stealth Coronal Mass Ejections with Magnetofrictional Simulations

Abstract Coronal mass ejections (CMEs) – among the most energetic events originating from Sun can cause significant and sudden disruption to magnetic particulate environment of heliosphere. Thus, in current era space-based technologies, early warning that a CME has left is crucial. Some CMEs exhibit signatures at solar surface lower corona as eruption occurs, thus enabling their prediction before arriving near-Earth satellites. However, fraction no such detectable are known “stealth CMEs”. Theoretical observational studies aiming understand physical mechanism behind stealth have identified coronal streamers potential sources. In this paper, we show streamer-blowout eruptions which do not involve lift-off low-coronal flux rope naturally produced even quasi-static magnetofrictional model for field. Firstly, magnetofriction reproduce way particular event observed during 1 2 June 2008. Secondly, predicts occurrence repeated without clear arcades, provided high, overlying field lines sufficiently sheared by differential rotation. A two-dimensional parameter study shows robust under variation parameters, frequency primarily determined footpoint shearing. This suggests models could, principle, provide indication pre-onset eruptions, whether or they originate rope.