TY - JOUR
T1 - Evidence for tether-cutting reconnection in a quadrupole magnetic configuration in the April 9, 2001, M7.9 flare
AU - Yurchyshyn, Vasyl
AU - Karlickỳ, M.
AU - Hu, Q.
AU - Wang, Haimin
N1 - Funding Information:
We thank referee Bernhard Kliem for valuable suggestions and constructive criticism which improved the clarity of the paper. We are obliged to the BBSO staff for their effort in obtaining the data and to A. Klassen for making the Potsdam radio spectrum available to us. We thank the ACE MAG instrument team and the ACE Science Center for providing the ACE data. SOHO is a project of international cooperation between ESA and NASA. VY work was supported under NSF grant ATM 0205157 and NASA NNGO 4GJ51G. MK acknowledges support under grant A3003202 of Academy of Sciences, Czech Republic. Qiang Hu’s work was supported by NASA grant NNG04GF47G.
PY - 2006/5
Y1 - 2006/5
N2 - We studied the M7.9 flare on April 9,2001 that occurred within a δ-sunspot of active region NOAA 9415. We used a multi-wavelength data set. which includes Yohkoh, TRACE, SOHO. and ACE spacecraft observations, Potsdam and Ondřejov radio data and Big Bear Solar Observatory (BBSO) images in order to study the large-scale structure of this two-ribbon flare that was accompanied by a very fast coronal mass ejection (CME). We analyzed light curves of the flare emission as well as the structure of the radio emission and report the following: the timing of the event, i.e., the fact that the initial brightenings, associated with the core magnetic field, occurred earlier than the remote brightening (RB), argue against the break-out model in the early phase of this event. We thus conclude that the M7.9 flare and the CME were triggered by a tether-cutting reconnection deep in the core field connecting the δ-spot and this reconnection formed an unstable flux rope. Further evolution of the erupted flux rope could be described either by the "standard" flare model or a break-out type of the reconnection. The complex structure of flare emission in visible, X-ray, and radio spectral ranges point toward a scenario which involves multiple reconnection processes between extended closed magnetic structures.
AB - We studied the M7.9 flare on April 9,2001 that occurred within a δ-sunspot of active region NOAA 9415. We used a multi-wavelength data set. which includes Yohkoh, TRACE, SOHO. and ACE spacecraft observations, Potsdam and Ondřejov radio data and Big Bear Solar Observatory (BBSO) images in order to study the large-scale structure of this two-ribbon flare that was accompanied by a very fast coronal mass ejection (CME). We analyzed light curves of the flare emission as well as the structure of the radio emission and report the following: the timing of the event, i.e., the fact that the initial brightenings, associated with the core magnetic field, occurred earlier than the remote brightening (RB), argue against the break-out model in the early phase of this event. We thus conclude that the M7.9 flare and the CME were triggered by a tether-cutting reconnection deep in the core field connecting the δ-spot and this reconnection formed an unstable flux rope. Further evolution of the erupted flux rope could be described either by the "standard" flare model or a break-out type of the reconnection. The complex structure of flare emission in visible, X-ray, and radio spectral ranges point toward a scenario which involves multiple reconnection processes between extended closed magnetic structures.
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U2 - 10.1007/s11207-006-0025-5
DO - 10.1007/s11207-006-0025-5
M3 - Article
AN - SCOPUS:33646575001
SN - 0038-0938
VL - 235
SP - 147
EP - 160
JO - Solar Physics
JF - Solar Physics
IS - 1-2
ER -