ON THE RELATION BETWEEN FILAMENT ERUPTIONS, FLARES, AND CORONAL MASS EJECTIONS - PowerPoint PPT Presentation

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ON THE RELATION BETWEEN FILAMENT ERUPTIONS, FLARES, AND CORONAL MASS EJECTIONS

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Title: ON THE RELATION BETWEEN FILAMENT ERUPTIONS, FLARES, AND CORONAL MASS EJECTIONS


1
ON 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 ?? ??
2
1. 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.

3
2. 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

4
3. Methods
  • Identifying a filament disappearance first.
  • Then they evaluate other observations to
    establish a relationship between the filament
    eruption and other phenomena.

5
3. 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.

6
3. 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.

7
4. 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.

8
5. 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).

9
5. 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
10
5. 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

11
5. 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.

12
5. 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.

13
6. 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.

14
Table1 -1-
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Table1 -2-
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Table1 -3-
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