Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-12T09:41:39.408Z Has data issue: false hasContentIssue false
  • English
  • Français

Flare and CME Onset: UV Spectra Show Fast 3-D Flow

Published online by Cambridge University Press:  13 May 2016

D. E. Innes
D. E. Innes*
Affiliation:
Max-Planck-Institut für Aeronomie, D-37191 Katlenburg-Lindau, Germany

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present observations taken in the corona above a flare that occurred on the west limb of the Sun. SUMER spectra show large red (350 km s−1) and blue (650 km s−1) Dopplershifts in Fe XX (107 K), Cr XVI (5 × 106 K), Si IX (106 K) and O III (105 K) emission lines. These shifts are associated with a fast moving (400 km s−1) optical emission front detected in high cadence images, taken with the coronagraph MICA. SXT images show fast soft X-ray ejecta that can be extrapolated back to the position of pre-flare coronal arcade structure seen in EIT 195 images. The observations are interpreted as evidence of a blast wave propagating through the active region coronal loop structure very early in the flare evolution.

Type
Session IV: Structure and Dynamics of the Transiton Region and Corona
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 374 - 376
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

Canfield, R. C. et al. 1996, ApJ, 464, 1016.CrossRefGoogle Scholar
Nitta, N., & Akiyama, S. 1999, ApJ, 525, L57.CrossRefGoogle Scholar
Shibata, K. et al. 1995, ApJ, 451, L83.CrossRefGoogle Scholar
Shimojo, M. et al. 1996, PASJ, 48, 123.Google Scholar