Speaker
Christina Cohen
(Caltech)
Description
Never before has the heliosphere and the Sun been so carefully monitored by so many spacecraft; near 1 AU at multiple longitudes and at other radial distances. The instrumentation on these spacecraft are continually observing solar activity and measuring the characteristics of solar energetic particle (SEP) events, providing a wealth of information on the acceleration and transport of SEPs. In February, 2011 the STEREO spacecraft reached a separation of 180° and since then we have had routine monitoring of the ‘backside’ of the Sun. This unprecedented view has allowed observations of active regions and solar activity after a region has rotated out of the view of the near-Earth spacecraft as well as the generation of new regions before they rotate into view from the east. The multiple viewpoints afforded by spectrometers and coronagraphs on the STEREO and near-Earth spacecraft has yielded more accurate information regarding the speed, direction, and evolution of coronal mass ejections (CMEs) which drive the interplanetary shocks that generate large SEP events. The multi-spacecraft observations of SEP events has revealed unexpectedly fast longitudinal transport and filling of the inner heliosphere with energetic particles. This talk reviews these capabilities and observations and focuses on what has been learned from them regarding the acceleration and transport of SEPs and the related solar activity.
| Registration number following "ICRC2015-I/" | 371 |
|---|---|
| Collaboration | -- not specified -- |
Primary author
Christina Cohen
(Caltech)
