Title: ON THE RELATION BETWEEN FILAMENT ERUPTIONS, FLARES, AND CORONAL MASS EJECTIONS
1ON THE RELATION BETWEEN FILAMENT ERUPTIONS,
FLARES, AND CORONAL MASS EJECTIONS Ju Jing,
Vasyl B. Yurchyshyn, Guo Yang, Yan Xu, and
Haimin Wang The Astrophysical Journal, 6141054
1062, 2004 October 20
??????? 2005.2.28 ?? ??
21. Introduction
- Early manifestations of CMEs in the solar
atmosphere. - To find possible relation ships between solar
surface phenomena such as filament eruptions and
flares, the CMEs occurrence, and the properties
of the associated magnetic field.
32. Data Sets
- BBSO Ha full disk image
- Kanzelehohe Solar Observatory full disk image
- MDI magnetograms
- EIT images
- LASCO C2 coronagraphs
- GOES Soft X-ray light curves
- SGD event reports
43. Methods
- Identifying a filament disappearance first.
- Then they evaluate other observations to
establish a relationship between the filament
eruption and other phenomena.
53. Methods 3.1 Data Selection
- Automatic filament disappearance detection
program 3620 events during 1999 Jun. 1 to 2003
Dec. 31. -gtfilament disappearance report - Surface area of at least 2000 arcsec2 -gt 243
events - Exclude misidentifications.
- Add active region filament eruptions. lt2000
arcsec2 small events. 22 events. - Then total 106 events43 complete Ha coverage.
63. Methods 3.2 Event Classification
- Flares --- Flares were identified first.Then
GOES and SGD were examined. - New flux emergence --- New flux emergences from
MDI magnetograms. - CMEs --- LASCO C2 coronagraph images and the CME
catalog to determine.The latitude of the CME be
within /- 30 deg.The CME appear within 2hr
after eruption.
74. Results of filament eruption association
- Type Active region filament or quiescent
filament. - Chirality --- When viewed from the positive
polarity side, the axial field of a dextral
filament points to the right. Sinistral to the
left. - Emerging flux regions --- lt 0.6 Rsun. limb for
gt0.6 Rsun. - Flares --- Ha, EIT, GOES X-ray plot, SGD.
- CMEs --- LASCO C2.
85. DISCUSSION 5.1. Chirality
- Filaments in the northern hemisphere are
predominantly dextral, while filaments in the
southern hemisphere are sinistral. - Filament chirality and the sign of magnetic
helicity in interplanetary CMEs (ICMEs).
95. DISCUSSION 5.2. New Flux Emergence
- 80 events.
- 54 (68) events by new flux emergence within 15
hr prior to the filament eruption. - Both active and quiet-Sun regions.
KSO
BBSO
MDI
105. DISCUSSION 5.3. Flares and CMEs -1-
- Top panel .. the heliographic latitude of flares
and CMEs. - 55 (56) of 98 events were accompanied by CMEs.
- 94 by Gilbert et al (2000)83 by Gopalswamy et
al.(2003)10-30 range by Yang Wang (2002) - Bottom panel .. the distribution of eruptive
filaments as a function of distance from the
solar disk center. - 70 occurs in R0.4-0.6Rsun
115. DISCUSSION 5.3. Flares and CMEs -2-
- Active region filaments (ARF) v.s. Quiescent
filaments (QF). - Association with flares ARF (95), QF (28)
- 85QFs 46(54) with CMEs, 23(27) with flares.
125. DISCUSSION 5.4. Halo CMEs
- 7 eruptive filament associated with halo CMEs and
Geomagnetic Storms. - The orientation of CMEs are assumed to be the
same as the orientationof the axial magnetic
field of the filaments.
136. SUMMARY
- 106 major filament eruption events from 1999 Jan
1 to 2003 Dec 31. - 55(56) of 98 events were associated with CMEs.
- Active region filament eruptins have a
considarably higher flare association(95) than
quiesent filament eruption (27) - 54(68) of 80 disk events were associated with
new flux emergence. - The chirality and the orientation of magnetic
fields of halo CMEs.
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