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A MULTI-SPACECRAFT VIEW OF A GIANT FILAMENT ERUPTION DURING 26/27 SEPTEMBER 2009 View all abstracts by submitter

Sanjay Gusain   Submitted: 2012-10-24 15:01

27 September 2009. The filament eruption was associated with a relatively slow coronal mass ejection (CME). The filament consisted of a large and a small part, both parts erupted nearly simultane- ously. Here we focus on the eruption associated with the larger part of the filament. The STEREO satellites were separated by about 117◦ during this event, so we additionally used SoHO/EIT and CORONAS/TESIS observations as a third eye (Earth view) to aid our measurements. We measure the plane-of-sky tra jectory of the filament as seen from STEREO-A and TESIS view-points. Us- ing a simple trigonometric relation, we then use these measurements to estimate the true direction of propagation of the filament which allows us to derive the true R/R⊙-time profile of the filament apex. Furthermore, we develop a new tomographic method that can potentially provide a more robust three-dimensional reconstruction by exploiting multiple simultaneous views. We apply this method also to investigate the 3D evolution of the top part of filament. We expect this method to be useful when SDO and STEREO observations are combined. We then analyze the kinematics of the eruptive filament during its rapid acceleration phase by fitting different functional forms to the height-time data derived from the two methods. We find that, for both methods, an exponential function fits the rise profile of the filament slightly better than parabolic or cubic functions. Finally, we confront these results with the predictions of theoretical eruption models.

Authors: Sanjay Gosain, Brigitte Schmieder, Guy Artzner, Sergei Bogachev, and Tibor Torok
Projects: CORONAS-F,SoHO-EIT,SoHO-MDI,STEREO

Publication Status: Accepted in ApJ
Last Modified: 2012-10-26 15:38
Go to main E-Print page  Resolving Azimuth Ambiguity Using Vertical Nature of Solar Quiet-Sun Magnetic Fields  DUAL TRIGGER OF TRANSVERSE OSCILLATIONS IN A PROMINENCE BY EUV FAST AND SLOW CORONAL WAVES: SDO/AIA AND STEREO/EUVI OBSERVATIONS  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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