The Evolution of Unstable 'Beta-Gamma' Magnetic Fields of Active Region AR 2222
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Author / Producer
Date
2015
Publication Type
Journal Article
ETH Bibliography
yes
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Abstract
This event allows us to investigate how plasma–magnetic field interactions in the solar corona can produce suprathermal electron populations over periods from tens of minutes to several hours, and the interactions of wave-particle and wave-wave lead to characteristic fine structures of the emission. An intense and broad solar radio burst type IV was recorded by CALLISTO spectrometer from 240-360 MHz. Using data from a the KRIM observatory, we aim to provide a comprehensive description of the synopsis formation and dynamics of a a single solar burst type IV event due to active region AR2222. For five minutes, the event exhibited strong pulsations on various time scales and “broad patterns” with a formation of a group type III solar burst. AR 2222 remained the most active region, producing a number of minor C-Class solar flares. The speed of the solar wind also exceeds 370.8 km/second with 10.2 g/cm3 density of proton in the solar corona. The radio flux also shows 171 SFU. Besides, there are 3 active regions, AR2217, AR2219 and AR2222 potentially pose a threat for M-class solar flares. Active region AR2222 have unstable 'beta-gamma' magnetic fields that harbor energy for M-class flares. As a conclusion, we believed that Sun’s activities more active in order to achieve solar maximum cycle at the end of 2014.
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Publication status
published
Editor
Book title
Volume
48
Pages / Article No.
95 - 102
Publisher
Scientific Publishing House Darwin
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Edition / version
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Software
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Date collected
Date created
Subject
Sun; solar burst; IV; radio region; X-ray region; solar flare; active region AR2222
Organisational unit
03928 - Refregier, Alexandre / Refregier, Alexandre