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Multi-Point Observations of Corotating Interaction Regions from STEREO and ACE

Leske, R. A. and Mason, G. M. and Cohen, C. M. S. and Cummings, A. C. and Labrador, A. W. and Stone, E. C. and Wiedenbeck, M. E. and von Rosenvinge, T. T. (2009) Multi-Point Observations of Corotating Interaction Regions from STEREO and ACE. In: Proceedings of the 31st International Cosmic Ray Conference. , Lodz, Poland.

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Although solar energetic particle (SEP) activity has been at a minimum for the last few years, significant particle enhancements due to corotating interaction regions (CIRs) have regularly appeared at 1 AU, providing an ideal opportunity to study CIR particles without SEP contamination. Observations of CIR time profiles from the two STEREO spacecraft commonly show delays that are often roughly as expected from the corotation time lag between the two spacecraft. However, in many cases different features seen at Ahead and Behind may suggest that transient disturbances in the solar wind alter connection to or transport from the shock, or that temporal changes occur in the CIR shock itself. We present CIR observations from STEREO and ACE at energies from ~2-10 MeV/nucleon and examine the evolution of CIR time profiles as a function of spacecraft separation in longitude, radius, and heliographic latitude.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Leske, R. A.0000-0002-0156-2414
Mason, G. M.0000-0003-2169-9618
Cohen, C. M. S.0000-0002-0978-8127
Cummings, A. C.0000-0002-3840-7696
Labrador, A. W.0000-0001-9178-5349
Stone, E. C.0000-0002-2010-5462
Wiedenbeck, M. E.0000-0002-2825-3128
Additional Information:Copyright University of Łódź. Department of High Energy Astrophysics, 2010
Group:Space Radiation Laboratory
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2009-19
Record Number:CaltechAUTHORS:20150522-161152863
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57785
Deposited By: Deborah Miles
Deposited On:01 Jun 2015 23:51
Last Modified:09 Mar 2020 13:19

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