ROSES ID: NNH10ZDA001N Selection Year: 2011
Program Element: Focused Science Topic
Principal Investigator: Natchimuthuk Gopalswamy
Affiliation(s): Goddard Space Flight Center
Yashiro, Seiji Co-I Catholic Univ.
Makela, Pertti Co-I Nasa/GSFC
Xie, Hong Co-I null
Summary:The scientific objective of this proposal is to identify the key source and environmental properties that determine the efficiency of acceleration of solar energetic particles (SEPs). Coronal mass ejection (CME) kinematics and flare properties derived using the Solar and Heliospheric Observatory (SOHO) and GOES data will be considered. In particular, the acceleration profiles of CMEs will be considered, which determines the heliocentric distance at which the shock is formed or becomes supercritical. Another property of importance is the CME and flare recurrence rates in the source active regions, for a higher rate would imply more CME interaction. The presence of intervening coronal holes (known to affect the CME trajectory), preceding CMEs, and Alfven speed variability in the corona, are the primary environmental factors that will be considered. The effect of coronal holes on CMEs is the trajectory change of CMEs and shocks, which can make a well-connected eruption to a poorly connected eruption and vice versa.
|Performance Year||Reference||Investigation Type||Actions|
|1||Chandra, R.; Gopalswamy, N.; Mäkelä, P.; Xie, H.; Yashiro,...||not set|
|1||Kahler, S. W.; Akiyama, S.; Gopalswamy, N.; (2011), The Effe...|
|1||Gopalswamy, Nat; Davila, Joseph; Kaiser, Michael; Macdowall,...|
|1||Gopalswamy, N.; Yashiro, S.; Akiyama, S.; Xie, H.; M...|
|1||Makela, P. A.; Gopalswamy, N.; Thakur, N.; Xie, H.; ...|
|1||Makela, P. A.; Xie, H.; Gopalswamy, N.; St Cyr, O. C.; (2015...|
|1||Gopalswamy, N.; Yashiro, Seiji; Thakur, Neeharika; Makela, P...|