Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh51a1988t&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH51A-1988
Astronomy and Astrophysics
Astrophysics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7531] Solar Physics, Astrophysics, And Astronomy / Prominence Eruptions
Scientific paper
The multiple views of the Sun afforded by the STEREO mission can be used to triangulate solar features. Much work has done using triangulation for data taken in the early part of the mission, when the separation between the spacecraft was moderately small. However, now that the two STEREO spacecraft are on opposite sides of the Sun, it's also possible to apply triangulation to features above the solar limb. So long as the corona is optically thin, the process of triagulation for separation angles a few degrees away from 180 degrees is mathematically the same as at a few degrees separation. The triangulation technique is applied to STEREO EUVI and COR1 observations of a massive erupting prominence on 6 December 2010, when the STEREO separation angle was 171.6 degrees. This geometry, with a small equivalent separation of only 8.4 degrees, was useful for resolving ambiguities between threads, thus disentangling the detailed fine structure of the prominence. The derived three-dimensional structure is compared with SDO/AIA observations of the same event. Only part of the prominence structure erupts; the remaining prominence becomes activitated, and then undergoes an eruption the following day after a 12 hour delay. In the 304 Angstrom line of He II, the second eruption appears to be a failed eruption, but material can be seen to erupt in the hotter iron lines. Both the original eruption and the secondary eruption are associated with separate coronal mass ejections. Detailed stereoscopic observations of the part of the filament involved in the second eruption shows a distinct change in the sign and amount of twist at the same time as the first eruption, indicating the formation of a flux rope.
No associations
LandOfFree
Formation of Twist in an Erupting Prominence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Formation of Twist in an Erupting Prominence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of Twist in an Erupting Prominence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-880610