IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Impulsive eruptive flare on 23 October, 2003, from NOAA AR10484
Autor/es:
CHANDRA, R.; JOSHI, B.; SCHMIEDER, B.; MANDRINI, C.H.; CRISTIANI, G.; UDDIN, W.; SRIVASTAVA, A.
Lugar:
Mysore
Reunión:
Congreso; 39th COSPAR General Assembly; 2012
Institución organizadora:
COSPAR
Resumen:
We present and discuss the multi-wavelength observations of an M2.4 are that
occurred in active region NOAA 10484 on 23 October, 2003. The are was well observed by
ARIES H
Solar Tower Telescope, TRACE, SOHO, and RHESSI instruments. The are was
very impulsive and eruptive in nature, accompanied by a narrow coronal mass ejection (CME).
H
and TRACE observations show initially dark mass ejected in the east direction; this was
followed by bright are material owing in the same direction. SOHO/EIT observations indicate
that the coronal eld structure can be opened towards the east. A coronal hole is observed at
the north of the AR and nearby active regions are seen at its south. We observe a RHESSI
X-ray compact source at the are location. SOHO/MDI data show that new minor polarities
are emerging at the east of AR 10484, where the are and CME occurred. The ow pattern
around the polarities shows positive twist in the active region. Strong moving magnetic feature
(MMF) activity is seen surrounding the very intense negative spot at the east before are onset.
A local linear force-free model of AR 10484 indicates that the AR magnetic eld structure at
this location is formed by large-scale and very extended loops. This is conrmed by a global
potential eld source surface (PFSS) model centered in the AR. The interaction of these MMFs
with the new emerging ux at the east could have been at the origin of the are and CME.