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On the onset of recurrent eruptions of a filament observed during August 2012

Published online by Cambridge University Press:  06 January 2014

Nandita Srivastava ,
Anand D. Joshi  and
Shibu K. Mathew
Nandita Srivastava
Affiliation:
Udaipur Solar Observatory, Physical Research Laboratory, Udaipur, India. email: nandita@prl.res.in; shibu@prl.res.in
Anand D. Joshi
Affiliation:
Korea Astronomy and Space Science Institute (KASI), Daejeon, Korea email: anand@kasi.re.kr
Shibu K. Mathew
Affiliation:
Udaipur Solar Observatory, Physical Research Laboratory, Udaipur, India. email: nandita@prl.res.in; shibu@prl.res.in
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Abstract

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We report observations of a long filament that underwent recurrent partial eruptions on August 4, 6, and 8, 2012. The filament reappeared in the subsequent rotation of the Sun, and disappeared completely on August 31, 2012. We implemented an automated filament detection algorithm developed by us for estimating different attributes of these filaments few hours prior to its disappearance in Hα and studied their evolution. Based on these attributes, we determine the onset time of the disappearance of Hα filaments. We then compared these onset times with that of the associated CMEs observed by LASCO/SOHO coronagraphs. This is also useful to understand temporal relationship of EUV and X-ray flux variation associated with filament disappearances in Hα. Our results show the importance of such studies in understanding the mechanism of CME initiation, particularly the role of eruptive filaments, in this process.

Keywords

FilamentsCMEsOnset timeetc
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S300: Nature of Prominences and their role in Space Weather , June 2013 , pp. 495 - 496
Copyright
Copyright © International Astronomical Union 2013 

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