ROSES ID: NNH14ZDA001N Selection Year: 2014
Program Element: Focused Science Topic
Principal Investigator: William Matthaeus
Affiliation(s): University of Delaware
Project Member(s):
Usmanov, Arcadi V Co-I University of Delaware
Rappazzo, Antonio Franco Co-I Advanced Heliophysics
Wan, Minping Co-I University of Delaware
Ruffolo, David J Co-I Mahidol University
Weygand, James M Co-I The Regents of the University of California
Summary:
Several challenging problems of great current interest in heliospheric physics and LWS science relate to magnetic field line connectivity and solar energetic particle (SEP) transport. Rapid transport of SEPs in latitude (e.g., seen by Ulysses) and in longitude (seen by STEREO) challenge both theory and prediction. A second (and we argue, related) problem is the broadening of boundaries between fast and slow solar wind due to stochastic interchange of connectivity, allowing energetic particles and plasma of different composition to transport and mix across boundaries. Both cases will be better understood by improved quantitative description of interconnection and exchange of magnetic flux between nearby topological families (flux tubes) due to topological effects in field line transport in space (Seripienlert et al., ApJ 711, 980, 2010), and exchange of field line connectivity in time (Rappazzo et al., ApJ 758, L14, 2012). These processes can have significant consequences considering the complex magnetic environment inferred from observations.Performance Year | Reference | Actions |
---|---|---|
1 | Kwon, R. Y.; Makela, P. A.; Lario, D.; Raouafi, N.Â... |