TABLE. Multi-Blob Events
Observed by COR2/STEREO-A from Jan. 2007 to Aug. 2011
The online table is given by a survey through the COR2/STEREO-A
observations from Jan. 2007 to Aug. 2011 searching for candidates of multi-blob
events. To select out the events, we require that (1) the events are caused by
CMEs or streamer disconnections, (2) the associated current-sheet ray
structures are recognizable either in the trailing part of the ejective
structure or above a nearby disturbed streamer structure; (3) two or more blob
structures are recognizable from the COR2A white light images. Totally, 45
multiple blob events were found and listed in this table.
According to their physical origins, we classify all the events into
three types: type I means the blobs in the event are observed along a
CME-trailing ray structure; type II means the blobs in the event are observed
along a pre-existing streamer-plasma sheet which is strongly disturbed by a
nearby CME eruption; type III means the blobs in the event is caused by a
streamer disconnection and no CME is involved. Among these 45 events, 5 events
showed signs of coalescence. These 5 events have been listed in Table I of the
article.
The data survey was conducted taking advantage of the online CDAW
database (http://cdaw.gsfc.nasa.gov/stereo/daily_movies/) and its mirror in
China hosted by the USTC-DREAMS team.
|
Event No. |
Event Typeb |
First appearance time of CMEs in COR2A (UT) |
CME principle angles |
Ray position angle at 3 Rs and the measurement time |
|
|
01 |
I-II |
2007/03/31 07:07 |
276 |
282 (288) |
04/01 10:07 |
|
02 |
I |
2007/04/03 01:07 |
248 |
241 |
04/03 17:07 |
|
03 |
I |
2007/06/04 19:37 |
263 |
258 |
06/05 13:07 |
|
04 |
I-II |
2007/06/27 13:37 |
241 |
241 (236) |
06/28 10:37 |
|
05 |
I |
2007/09/19 09:07 |
249 |
243 |
09/20 20:07 |
|
06 |
II |
2007/11/14 18:37 |
231 |
(248) |
11/15 12:37 |
|
07 |
II |
2007/11/16 10:07 |
265 |
(248) |
11/16 18:37 |
|
08 |
I |
2008/02/08 13:07 |
240 |
230 |
02/10 07:37 |
|
09 |
I |
2008/05/02 13:07 |
234 |
235 |
05/03 05:37 |
|
10a |
III |
2008/06/25 18:37 |
\ |
(244) |
06/25 18:37 |
|
11 |
I |
2008/07/01 02:07 |
291 |
290 |
07/01 21:37 |
|
12 |
I |
2008/07/07 10:37 |
116 |
119 |
07/08 05:37 |
|
13 |
I |
2008/07/31 11:37 |
287 |
282 |
08/01 16:07 |
|
14a |
I |
2008/09/13 02:37 |
101 |
94 |
09/13 19:07 |
|
15 |
III |
2008/11/28 08:07 |
\ |
(269) |
11/28 08:07 |
|
16 |
I |
2009/01/31 08:07 |
283 |
287 |
02/01 04:07 |
|
17 |
I |
2009/02/05 12:07 |
106 |
110 |
02/06 09:07 |
|
18 |
I-II |
2009/02/07 11:37 |
279 |
274 (263) |
02/08 20:37 |
|
19 |
I |
2009/02/10 20:37 |
261 |
267 |
02/12 13:37 |
|
20 |
I |
2009/02/18 06:07 |
67 |
74 |
02/19 01:07 |
|
21 |
I-II |
2009/04/25 11:07 |
278 |
273 (283) |
04/27 04:07 |
|
22 |
III |
2009/06/30 23:37 |
\ |
(262) |
06/30 23:37 |
|
23 |
I |
2009/07/26 12:37 |
77 |
78 |
07/27 08:37 |
|
24 |
I |
2009/08/25 10:39 |
77 |
84 |
08/25 21:39 |
|
25 |
I-II |
2009/11/21 07:24 |
89 |
84 (101) |
11/23 21:24 |
|
26 |
I |
2010/02/03 01:54 |
292 |
290 |
02/03 12:08 |
|
27 |
I-II |
2010/02/24 15:54 |
117 |
114 (121) |
02/25 13:24 |
|
28 |
I |
2010/03/17 13:24 |
237 |
241 |
03/18 10:39 |
|
29 |
I |
2010/04/03 09:24 |
115 |
119 |
04/04 02:39 |
|
30a |
I |
2010/05/23 17:54 |
79 |
58 |
05/24 06:24 |
|
31 |
I-II |
2010/05/26 15:54 |
118 |
118 (127) |
05/28 06:24 |
|
32 |
I-II |
2010/06/27 00:54 |
107 |
111 (120) |
06/27 20:39 |
|
33 |
I-II |
2010/08/08 09:54 |
247 |
243 (232) |
08/09 02:39 |
|
34 |
I |
2010/09/04 15:54 |
59 |
122 |
09/04 23:39 |
|
35a |
II |
2010/10/28 11:24 |
250 |
(234) |
10/29 15:24 |
|
36 |
II |
2010/10/30 22:54 |
239 |
(257) |
10/31 21:39 |
|
37a |
I |
2010/11/26 08:24 |
242 |
231 |
11/26 17:24 |
|
38 |
I-II |
2011/03/17 12:54 |
254 |
250 (230) |
03/18 03:39 |
|
39 |
I |
2011/03/21 02:24 |
307c |
307 |
03/21 09:24 |
|
40 |
I |
2011/05/09 21:24 |
Halo CMEc |
34 |
05/10 12:24 |
|
41 |
I |
2011/05/12 20:24 |
56 |
48 |
05/13 19:39 |
|
42 |
I |
2011/05/20 21:54 |
298 |
295 |
05/21 08:24 |
|
43 |
I |
2011/07/09 00:54 |
105 |
104 |
07/09 17:24 |
|
44 |
I |
2011/07/20 09:24 |
311 |
317 |
07/21 20:24 |
|
45 |
I |
2011/08/24 00:24 |
238 |
254 |
08/24 15:24 |
a). Events that will be listed separately in Table I of the article.
b). For the events classified as 'I-II' and 'III', the numbers in the brackets
represent the relevant position angles of the streamer rays measured at 3 Rs.
c). For most events, we adopt the values of principle angles given by
the automatic CACTUS CME recognition program (http://sidc.oma.be/cactus), except for the
39th and the 40th events. Both events have been treated as consisting of two
separate eruptions by CACTUS, while we prefer to take them as one single event
and make our own measurements of the principle angles.
------------------------------------------------------------
Movie 1. White-light and running difference images/animations observed
by STEREO-A COR1 and COR2 coronagraphs for the blob-coalescence event dated on
2010.05.24 (the 30th event in the above table). See text for
details.
(Click here with the right mouse
button to save the above movie)
The following two animations with radial domains from 1-4 solar radii
and 1-15 solar radii are given by a 2.5D MHD numerical simulation based on
the catastrophic flux rope model
developed by Hu et al. (2003) and Chen et al. (2006,
2007, 2009). The simulation shows the emergence, eruption, and propagation of a
modeled flux rope in the background triple-streamer solar wind system.
The contour map shows the radial velocity field with the value of the
velocity given by the color bar on top of the animation. Superposed curves are
the magnetic field lines, where the thick red curve depicts the outer border of
the flux rope.
The generation and the merging of multiple blobs in the current sheet
behind the flux rope ejecta, as well as along the
streamer plasma sheet that is strongly disturbed by the eruption, are clearly
observed.
Movie 2 (From 1 to 4 solar radii) (Click
here with the right mouse button to save this movie)
Movie 3 (From 1 to 15 solar radii) (Click
here with the right mouse button to save this movie)
