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Prominence Eruption and Coronal Mass Ejection: A
Statistical Study Using Microwave Observations
Gopalswamy, N.; Shimojo,M.; Lu, W.; Yashiro, S.;
Shibasaki, K.; Howard, R. A.
ApJ, 586, 562-578, 2003
太陽雑誌会 2003/4/28
殿岡英顕
概要
●
下条氏のNoRH Prominence catalog と、八代氏
の LASCO CME catalog を合わせて、統計的
に解析したもの。
2.Data Selection
●
●
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Automatic detection of limb events at NoRH
17GHz, from 1996 January 1 to 2001 December
31.
SOHO LASCO C2 and C3, corresponding to the
prominence events.
186 events total (excluding SOHO major datagap)
3.1 Prominence trajectories
Fig1: Typical prominence trajectories
Fig2. Time-height plot
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T for
Transvers
e, 34/186
R for
Radial,
152/186
3.2 Prominence heights
Fig3. Max height
3.3 Prominence velocities
Fig4. Average speed
Fig5. Speed vs. Height
4. Relation between CMEs and PEs
Table1: measured properties
Fig6. CMEProminence
relationship with
association
●
An eruptive
prominence of
2000 Oct 22.
Fig7. CMEProminence
relationship
without
association
●
●
An
prominence
erupton event
of 2001 Aug
29
No discernible
change on
LASCO
observations.
Table2: Statistical properties
Fig8. Height histograms
●
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134/186 PEs were
associated with CMEs,
34 no associated CMEs,
11 streamer change.
CME+PE events:
faster and larger heights
4.1 Source latitude
Fig9. Latitude distribution
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●
PE distributions:
–
2 peaks
–
events from almost all
latitudes
–
3 from eqator
CME distributions:
–
One broad peak
centered on the equator
–
almost all latitudes
Fig10: Solar cycle variation
●
●
CME and PE latitude vs
Carrington rotation
number
CME and PE occur at all
latitudes during solar
maxima and close to
equator during solar
minimum.
4.2 Timing relationship
Fig11: The difference
between two onset time
●
Onset times of PEs and
CMEs are roughly the
same within +/- 0.5hr.
4.3 Spatial relationship
Fig12: Spatial relationship
●
●
●
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The latitude offsets of
PEs and CMEs.
More events with
positive offsets
The latitude of CMEs is
closer to the equator
than that of
corresponding
prominence.
Positive offset before
2000.
4.4 Core association
Fig13:An example
of the prominenceCME association
●
●
2001 Dec 19-20
Radio+EIT195+
LASCO
Fig14: Speed
distribution of CME,
core and PE
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98/134 (73%) had clear
whitelight cores.
Fig15: Core speed
vs PE speed
●
●
Core speed is
always greater than
PE speed
fast PEs associated
with fast cores (?)
4.5 Streamer
events
Fig16: An
example of
streamer event
●
●
●
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1998 June 1 PE
1.24 Rsun
(initial) to 1.28
Rsun (final)
streamer
expanded
11/52 = 21%
were associated
5. Discussions
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●
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Munro et al. (1979):The prominences with large
height have better association with CMEs.
Gilbert et al. (2000): CME associations are
different (They are larger).
Hori & Culhane (2002): association with CMEs
92% vs 76%. The difference of selection criteira.
Yang & Wang (2002): association rate 10 to 30%,
65% for Gopalswamy's check.
6. Summary and conclusions
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Radial (eruptive) and Transverse (active) events
Radial events showed close relationship to the
CMEs (83%).
73% of all the PEs were associated with CMEs.
Onsets of PEs and CMEs were nearly
simultaneous, within 30min.
CPAs of CMEs and PEs generally did not
coincide. CMEs – equator, PEs- AR belt for
minimum, no such relationship for solar
maximum.

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