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SEPs and CMEs during cycle 23

Published online by Cambridge University Press:  01 September 2008

Pertti Mäkelä ,
Nat Gopalswamy ,
Seiji Yashiro ,
Sachiko Akiyama ,
Hong Xie  and
Eino Valtonen
Pertti Mäkelä
Affiliation:
Dept. of Physics, Catholic University of America, 200 Hannan Hall, Washington, DC 20064, USA email: pertti.makela@nasa.gov, sachiko.akiyama@nasa.gov, hong.xie@nasa.gov
Nat Gopalswamy
Affiliation:
Nasa Goddard Space Flight Center, Code 695, Greenbelt, MD 20771, USA email: nat.gopalswamy@nasa.gov
Seiji Yashiro
Affiliation:
Interferometrics, Inc, 13454 Sunrise Valley Drive, Herndon, VA 20171, USA email: seiji.yashiro@nasa.gov
Sachiko Akiyama
Affiliation:
Dept. of Physics, Catholic University of America, 200 Hannan Hall, Washington, DC 20064, USA email: pertti.makela@nasa.gov, sachiko.akiyama@nasa.gov, hong.xie@nasa.gov
Hong Xie
Affiliation:
Dept. of Physics, Catholic University of America, 200 Hannan Hall, Washington, DC 20064, USA email: pertti.makela@nasa.gov, sachiko.akiyama@nasa.gov, hong.xie@nasa.gov
Eino Valtonen
Affiliation:
Dept. of Physics & Astronomy, University of Turku, Vesilinnantie 5, FI-20014 Turku University, Finland email: eino.valtonen@utu.fi
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Abstract

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We present a study of solar energetic particles (SEPs) in association with coronal mass ejections (CMEs) and type II radio bursts. The particle and CME observations cover the years 1996–2007. We find that heavy-ion events in association with type II bursts and proton events are produced in more western and most energetic CMEs. In addition, the source distribution of type II associated proton events with heavy ions reminds the source distribution expected for events with flare particles. Therefore, the estimation of relative contributions by flares and shocks in SEP events and separation of suggested different particle acceleration models is complicated.

Keywords

Acceleration of particlesSun: coronal mass ejections (CMEs)Sun: particle emission
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S257: Universal Heliophysical Processes , September 2008 , pp. 475 - 477
Copyright
Copyright © International Astronomical Union 2009

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