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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/35882
Title: EFFECT of COHERENT STRUCTURES on ENERGETIC PARTICLE INTENSITY in the SOLAR WIND at 1 AU
Authors: Jeffrey A. Tessein
David Ruffolo
William H. Matthaeus
Minping Wan
Joe Giacalone
Marcia Neugebauer
University of Delaware
Mahidol University
University of Arizona
Keywords: Earth and Planetary Sciences
Issue Date: 10-Oct-2015
Citation: Astrophysical Journal. Vol.812, No.1 (2015)
Abstract: © 2015. The American Astronomical Society. All rights reserved.. We present results from an analysis of Advanced Composition Explorer (ACE) observations of energetic particles in the 0.047-4.78 MeV range associated with shocks and discontinuities in the solar wind. Previous work found a strong correlation between coherent structures and energetic particles measured by ACE/EPAM. Coherent structures are identified using the Partial Variance of Increments (PVI) method, which is essentially a normalized vector increment. The correlation was based on a superposed epoch analysis using over 12 years of data. Here, we examine many individual high-PVI events to better understand this association emphasizing intervals selected from data with shock neighborhoods removed. We find that in many cases the local maximum in PVI is in a region of rising or falling energetic particle intensity, which suggests that magnetic discontinuities may act as barriers inhibiting the motion of energetic particles across them.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84946118876&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/35882
ISSN: 15384357
0004637X
Appears in Collections:Scopus 2011-2015

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