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Major solar flares without coronal mass ejections

Published online by Cambridge University Press:  01 September 2008

N. Gopalswamy ,
S. Akiyama  and
S. Yashiro
N. Gopalswamy
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA email: nat.gopalswamy@nasa.gov
S. Akiyama
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA email: nat.gopalswamy@nasa.gov The Catholic University of America, 620 Michigan Ave. NE Washington DC. 20064, USA email: sachiko.akiyama@nasa.gov
S. Yashiro
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA email: nat.gopalswamy@nasa.gov The Catholic University of America, 620 Michigan Ave. NE Washington DC. 20064, USA email: sachiko.akiyama@nasa.gov Interferometrics Inc., 13454 Sunrise Valley Dr. #240, Herndon, VA 20171, USA email: seiji.yashiro@nasa.gov
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Abstract

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We examine the source properties of X-class soft X-ray flares that were not associated with coronal mass ejections (CMEs). All the flares were associated with intense microwave bursts implying the production of high energy electrons. However, most (85%) of the flares were not associated with metric type III bursts, even though open field lines existed in all but two of the active regions. The X-class flares seem to be truly confined because there was no material ejection (thermal or nonthermal) away from the flaring region into space.

Keywords

coronal mass ejections (CMEs)flaresparticle emissionradio radiation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S257: Universal Heliophysical Processes , September 2008 , pp. 283 - 286
Copyright
Copyright © International Astronomical Union 2009

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