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Author Uddin, W. ♦ Jain, R. ♦ Yoshimura, K. ♦ Chandra, R. ♦ Sakao, T. ♦ Kosugi, T. ♦ Joshi, A. ♦ Deshpande, M. R.
Source Aryabhatta Research Institute of Observational Sciences (ARIES)
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Impulsive Flare ♦ Solar System ♦ Coronal Mass Ejections
Abstract We present the results of a detailed analysis of multi-wavelength observations of a veryimpulsive solar flare 1B/M6.7, which occurred on 10 March, 2001 in NOAA AR 9368 (N27 W42). The observations show that the flare is very impulsive with a very hard spectrum in HXR that reveal that non-thermal emission was most dominant. On the other hand, this flare also produced a type II radio burst and coronal mass ejections (CME), which are not general characteristics for impulsive flares. In Hα we observed bright mass ejecta (BME) followed by dark mass ejecta (DME). Based on the consistency of the onset times and directions of BME and CME, we conclude that these two phenomena are closely associated. It is inferred that the energy build-up took place due to photosphericreconnection between emerging positive parasitic polarity and predominant negative polarity, which resulted as a consequence of flux cancellation. The shear increased to >80º due to further emergence of positive parasitic polarity causing strongly enhanced cancellation of flux. It appears that such enhanced magnetic flux cancellation in a strongly sheared region triggered the impulsive flare.
Part of series sp225-325
Educational Use Research
Education Level UG and PG
Learning Resource Type Article