ISOON-Based Investigation of Solar Eruptions.

摘要

We examined ISOON (Improved Solar Optical Observing Network) telescope observations, in conjunction with other ground- and spaced-base data sets, of eruptive solar events in order to improve understanding of the origins of severe space weather. Principal results included: (1) the identification of the recently-discovered changes in line-of-sight photospheric magnetic fields during flares as an impulsive phase phenomenon linked to the main acceleration phase of coronal mass ejections (CMEs); and (2) the first unambiguous demonstration that solar Moreton waves are driven by the lateral expansion of CMEs. This second result underscores the value of ISOON data, used in combination with high-cadence coronal images from spacecraft such as the Solar Dynamics Observatory and the Solar Terrestrial Relations Observatory (STEREO), for probing the dynamics of energetic eruptions on the Sun.