CMEs as observed in SDO - comparisons with White Light observations
Abstract
The Atmospheric Imaging Assembly (AIA) is an ideal instrument to observe the initial phases of Corona Mass Ejections (CME) because is has a 12 second time cycle time during which it takes images in 8 spectral bands each of which has 41 arc second field of view. The 8 images,coaligned to a few tenths of a pixel, span a temperature range from 6000 to 20,000,000 K. The 4096 x4096 CCD detectors have a dynamic range of 10,000. These observations can be directly correlated with the white light coronal images produced by LASCO on SOHO and on the STEREO A and B spacecraft. STEREO also produces EUV images, although not at as high a cadence as AIA, that can be used to do some basic triangulation of the initial phases of the CME process. The Heliospheric images on STEREO can follow ejecta to the Earth and beyond. The spatial and temporal details provided by the set of systems in space are a challenge to modelers. Modern numerical simulations are not capturing some of the essential feature of CME initiation and evolution. Movies will be shown of some of the correlated events in the CME process.
- Publication:
-
39th COSPAR Scientific Assembly
- Pub Date:
- July 2012
- Bibcode:
- 2012cosp...39.1978T