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Solar Physics (2006) 237: 85100 DOI: 10.1007/s11207-006-0173-7 C Springer 2006
 

Summary: Solar Physics (2006) 237: 85­100
DOI: 10.1007/s11207-006-0173-7 C Springer 2006
IS PRE-ERUPTIVE NULL POINT RECONNECTION REQUIRED FOR
TRIGGERING ERUPTIONS?
HUI LI
Purple Mountain Observatory, 2 West Beijing Road, Nanjing 210008, China
(e-mail: lihui@mail.pmo.ac.cn)
BRIGITTE SCHMIEDER and GUILLAUME AULANIER
Observatoire de Paris, Section de Meudon, LESIA, F-92195, Meudon Principal Cedex, France
and
ARKADIUSZ BERLICKI
Astronomical Institute, Wroclaw University, ul.Kopernika 11, 51-622 Wroclaw, Poland
(Received 10 March 2006; accepted 10 June 2006; Published online 8 August 2006)
Abstract. We study the magnetic field evolution and topology of the active region NOAA 10486
before the 3B/X1.2 flare of October 26, 2003, using observational data from the French­Italian
THEMIS telescope, the Michelson Doppler Imager (MDI) onboard Solar and Heliospheric Obser-
vatory (SOHO), the Solar Magnetic Field Telescope (SMFT) at Huairou Solar Observation Station
(HSOS), and the Transition Region and Coronal Explorer (TRACE). Three dimensional (3D) extrap-
olation of photospheric magnetic field, assuming a potential field configuration, reveals the existence
of two magnetic null points in the corona above the active region. We look at their role in the trig-

  

Source: Aulanier, Guillaume - Observatoire de Paris
Li, Hui - Purple Mountain Observatory

 

Collections: Physics