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Flare-CME Events Associated With a Superactive Region

Published online by Cambridge University Press:  13 May 2016

J. Wang ,
J. Zhang ,
T. Wang ,
C. Zhang ,
Y. Liu ,
N. Nitta  and
G. L. Slater
J. Wang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Beijing 100012, China
J. Zhang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Beijing 100012, China
T. Wang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Beijing 100012, China
C. Zhang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Beijing 100012, China
Y. Liu
Affiliation:
Hansen Experimental Physics Laboratory Stanford University, USA
N. Nitta
Affiliation:
Lockheed Martin Solar and Astrophysics Laboratory Palo Alto, CA 94304, USA
G. L. Slater
Affiliation:
Lockheed Martin Solar and Astrophysics Laboratory Palo Alto, CA 94304, USA

Abstract

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In a few recent studies, 8 coronal mass ejections (CMEs) were identified to associate with a superactive region, AR 8100. They were all flare-CME events, It is found that the region is characterized by vigorous flux emergence and an imbalance of magnetic flux in two polarities. With the continuous flux emergence and its driven flux cancellation, the EUV dimming associated with flare activity increased in area. Whenever the dimming extended to an area of more than 50×50 square degrees on the solar surface, a flare in the region became CME-associated.

Type
Session III: Active Region Structure and Dynamics
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 331 - 333
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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