Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh51a1998s&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH51A-1998
Astronomy and Astrophysics
Astrophysics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections
Scientific paper
In this paper, with a survey through the Large Angle and Spectrometric Coronagraph data from 1996 to 2009, we present 11 events with plasma blobs flowing outwards sequentially along a bright coronal ray in the wake of coronal mass ejections. The rays are believed to be associated with the current sheet structure that formed as a result of the solar eruption, and the blobs are products of magnetic reconnections occurring along the current sheets. The ray morphology and blob dynamics are investigated statistically. It is found that the apparent angular widths of the rays at certain times vary in a range of 2.1° - 6.6° (2.0° - 4.4°) with an average of 3.5° (2.9°) at 3 Rs (4 Rs), and the observable time durations vary from 12 hours to a few days with an average of 27 hours. It is also found, based on the dynamical analysis on the blob motions, that 58% (26) of the blobs are accelerated, 20% (9) are decelerated, and 22% (10) move with a nearly-constant speed. Comparing the dynamics of our blobs and those that are observed above the tip of helmet streamers, we find that the speeds and accelerations of the blobs in these two cases differ significantly. It is suggested that these differences of the blob dynamics stem from the associated magnetic reconnections involving different magnetic field configurations and triggering processes.
Chen Yafeng
Feng Shiping
Kong Xin-wei
Li Baowen
Li Gaojun
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