TY - JOUR
T1 - KH -mechanism of a solar eruption produced self-consistently by flux emergence
AU - Magara, Tetsuya
PY - 2013/6/25
Y1 - 2013/6/25
N2 - We report on a new magnetohydrodynamic simulation for the sequence evolution of a magnetic field from emergence to eruption on the Sun. The magnetic field in the shape of a twisted flux tube emerging below the solar surface forms a pre-eruptive structure in the corona, which is composed of expanding envelop flux and a quasi-static inner core called flux rope; this inner core eventually seems to erupt. The evolution proceeds self-consistently; that is, any preexisting coronal magnetic field that causes additional side effects on the evolution of the emerging magnetic field is not assumed. This highlights a possible eruption mechanism inherent in the dynamic nature of the emerging magnetic field. The mechanism is characterized by two key quantities: the curvature (k) and the scale height (H) of the emerging magnetic field.
AB - We report on a new magnetohydrodynamic simulation for the sequence evolution of a magnetic field from emergence to eruption on the Sun. The magnetic field in the shape of a twisted flux tube emerging below the solar surface forms a pre-eruptive structure in the corona, which is composed of expanding envelop flux and a quasi-static inner core called flux rope; this inner core eventually seems to erupt. The evolution proceeds self-consistently; that is, any preexisting coronal magnetic field that causes additional side effects on the evolution of the emerging magnetic field is not assumed. This highlights a possible eruption mechanism inherent in the dynamic nature of the emerging magnetic field. The mechanism is characterized by two key quantities: the curvature (k) and the scale height (H) of the emerging magnetic field.
KW - Magnetohydrodynamics: MHD
KW - Sun: coronal mass ejections
KW - Sun: magnetic fields
UR - http://www.scopus.com/inward/record.url?scp=84880966539&partnerID=8YFLogxK
U2 - 10.1093/pasj/65.3.L5
DO - 10.1093/pasj/65.3.L5
M3 - Article
AN - SCOPUS:84880966539
SN - 0004-6264
VL - 65
JO - Publication of the Astronomical Society of Japan
JF - Publication of the Astronomical Society of Japan
IS - 3
M1 - L5
ER -