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How efficient are coronal mass ejections at accelerating solar energetic particles?

Mewaldt, R. A. and Cohen, C. M. S. and Giacalone, J. and Mason, G. M. and Chollet, E. E. and Desai, M. I. and Haggerty, D. K. and Looper, M. D. and Selesnick, R. S. and Vourlidas, A. (2008) How efficient are coronal mass ejections at accelerating solar energetic particles? In: Particle Acceleration and Transport in the Heliosphere and Beyond--7th Annual Astrophysics Conference. AIP Conference Proceedings. No.1039. American Institute of Physics , Melville, NY, pp. 111-117. ISBN 978-0-7354-0566-0.

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The largest solar energetic particle (SEP) events are thought to be due to particle acceleration at a shock driven by a fast coronal mass ejection (CME). We investigate the efficiency of this process by comparing the total energy content of energetic particles with the kinetic energy of the associated CMEs. The energy content of 23 large SEP events from 1998 through 2003 is estimated based on data from ACE, GOES, and SAMPEX, and interpreted using the results of particle transport simulations and inferred longitude distributions. CME data for these events are obtained from SOHO. When compared to the estimated kinetic energy of the associated coronal mass ejections (CMEs), it is found that large SEP events can extract ~10% or more of the CME kinetic energy. The largest SEP events appear to require massive, very energetic CMEs.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Mewaldt, R. A.0000-0003-2178-9111
Cohen, C. M. S.0000-0002-0978-8127
Mason, G. M.0000-0003-2169-9618
Desai, M. I.0000-0002-7318-6008
Haggerty, D. K.0000-0001-6395-8943
Vourlidas, A.0000-0002-8164-5948
Additional Information:© 2008 American Institute of Physics. This work was supported by NASA under grants NAG5-12929, NNG04GB88B, and NNX06AC21G. We appreciate the availability of GOES data from NOAA and CME data from SOHO. We acknowledge helpful suggestions by Dave McComas. Finally, we thank the organizers for a very productive and enjoyable conference.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:astronomical instruments; solar flares; solar prominences
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2006-11
Series Name:AIP Conference Proceedings
Issue or Number:1039
Classification Code:PACS: 95.50.Vg, 96.50.Pw,,
Record Number:CaltechAUTHORS:20090518-130926006
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14258
Deposited By: Tony Diaz
Deposited On:18 Aug 2009 22:46
Last Modified:08 Nov 2021 22:44

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