title: Data-driven magnetohydrodynamic modelling of a flux-emerging active region leading to solar eruption.
abstract: Solar eruptions are well-recognized as major drivers of space weather but what causes them remains an open question. Here we show how an eruption is initiated in a non-potential magnetic flux-emerging region using magnetohydrodynamic modelling driven directly by solar magnetograms. Our model simulates the coronal magnetic field following a long-duration quasi-static evolution to its fast eruption. The field morphology resembles a set of extreme ultraviolet images for the whole process. Study of the magnetic field suggests that in this event, the key transition from the pre-eruptive to eruptive state is due to the establishment of a positive feedback between the upward expansion of internal stressed magnetic arcades of new emergence and an external magnetic reconnection which triggers the eruption. Such a nearly realistic simulation of a solar eruption from origin to onset can provide important insight into its cause, and also has the potential for improving space weather modelling.
authors.affiliation: SIGMA Weather Group, State Key Laboratory for Space Weather, National Space Science Center, Chinese Academy of Sciences, No.1 Nan-Er-Tiao, Zhong-Guan-Cun, Hai-Dian District, Beijing 100190, China.|Center for Space Plasma &Aeronomic Research, The University of Alabama in Huntsville, Huntsville, Alabama 35899, USA.
authors.forename: Chaowei
authors.initials: C
authors.lastname: Jiang
authors.affiliation: Center for Space Plasma &Aeronomic Research, The University of Alabama in Huntsville, Huntsville, Alabama 35899, USA.
authors.forename: S T
authors.initials: ST
authors.lastname: Wu
authors.affiliation: SIGMA Weather Group, State Key Laboratory for Space Weather, National Space Science Center, Chinese Academy of Sciences, No.1 Nan-Er-Tiao, Zhong-Guan-Cun, Hai-Dian District, Beijing 100190, China.
authors.forename: Xuesheng
authors.initials: X
authors.lastname: Feng
authors.affiliation: Center for Space Plasma &Aeronomic Research, The University of Alabama in Huntsville, Huntsville, Alabama 35899, USA.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Hu