Causes and Effects of Filament Eruptions

International Astronomical Union Colloquium ◽

10.1017/s0252921100047886 ◽

1998 ◽

Vol 167 ◽

pp. 342-349

Author(s):

Boris P. Filippov

Keyword(s):

Solar Activity ◽

Magnetic Configuration ◽

Filament Eruption ◽

Catastrophic Loss

AbstractObservational and theoretical aspects of filament destabilization are reviewed in light of the concept of filament eruption as catastrophic loss of equilibrium in a magnetic configuration of inverse polarity. Interrelations between eruptive prominences and other phenomena of solar activity such as flares, CMEs, and loop arcade are considered.

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Solar activity due to magnetic complexity of active regions

Proceedings of the International Astronomical Union ◽

10.1017/s1743921311015183 ◽

2010 ◽

Vol 6 (S273) ◽

pp. 164-168

Author(s):

Brigitte Schmieder ◽

Cristina Mandrini ◽

Ramesh Chandra ◽

Pascal Démoulin ◽

Tibor Török ◽

...

Keyword(s):

Solar Activity ◽

Solar Rotation ◽

Active Regions ◽

Magnetic Clouds ◽

Stored Energy ◽

Mhd Simulation ◽

Helicity Injection ◽

Filament Eruption ◽

Filament Channel ◽

3D Mhd Simulation

AbstractActive regions (ARs), involved in the Halloween events during October-November 2003, were the source of unusual activity during the following solar rotation. The flares on 18-20 November 2003 that occur in the AR NOAA10501 were accompanied by coronal mass ejections associated to some particularly geoeffective magnetic clouds.Our analysis of the magnetic flux and helicity injection revealed that a new emerging bipole and consequent shearing motions continuously energized the region during its disk passage. The stored energy was eventually released through the interaction of the various systems of magnetic loops by several magnetic reconnection events. Active events on November 18 (filament eruptions and CMEs) were originated by shearing motions along a section of the filament channel that injected magnetic helicity with sign opposite to that of the AR. Two homologous flares, that occurred on November 20, were apparently triggered by different mechanisms as inferred from the flare ribbons evolution (filament eruption and CMEs). We studied in detail the behaviour of two North-South oriented filaments on November 20 2003. They merged and split following a process suggestive of ‘sling-shot’ reconnection between two coronal flux ropes. We successfully tested this scenario in a 3D MHD simulation that is presented in this paper.

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Two Episodes of a Filament Eruption from a Fan-spine Magnetic Configuration

The Astrophysical Journal ◽

10.3847/1538-4357/aba7c0 ◽

2020 ◽

Vol 900 (2) ◽

pp. 158

Author(s):

Jiayan Yang ◽

Junchao Hong ◽

Haidong Li ◽

Yunchun Jiang

Keyword(s):

Magnetic Configuration ◽

Filament Eruption

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Influence of Magnetic Fields on Solar Hydrodynamics: Experimental Results

International Astronomical Union Colloquium ◽

10.1017/s025292110005329x ◽

1977 ◽

Vol 36 ◽

pp. 143-180 ◽

Cited By ~ 10

Author(s):

J.O. Stenflo

Keyword(s):

Solar Activity ◽

Energy Balance ◽

Magnetic Fields ◽

Solar Atmosphere ◽

General Problem ◽

Solar Rotation ◽

Active Regions ◽

Physical Conditions ◽

Dynamic Phenomena

It is well-known that solar activity is basically caused by the Interaction of magnetic fields with convection and solar rotation, resulting in a great variety of dynamic phenomena, like flares, surges, sunspots, prominences, etc. Many conferences have been devoted to solar activity, including the role of magnetic fields. Similar attention has not been paid to the role of magnetic fields for the overall dynamics and energy balance of the solar atmosphere, related to the general problem of chromospheric and coronal heating. To penetrate this problem we have to focus our attention more on the physical conditions in the ‘quiet’ regions than on the conspicuous phenomena in active regions.

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Prominences and Solar Activity

International Astronomical Union Colloquium ◽

10.1017/s0252921100065817 ◽

1979 ◽

Vol 44 ◽

pp. 357-372

Author(s):

Z. Švestka

Keyword(s):

Solar Activity ◽

Solar Cycle ◽

List Type ◽

Type Number ◽

Flare Loops ◽

Filament Activation

The following subjects were discussed:(1)Filament activation(2)Post-flare loops.(3)Surges and sprays.(4)Coronal transients.(5)Disk vs. limb observations.(6)Solar cycle variations of prominence occurrence.(7)Active prominences patrol service.Of all these items, (1) and (2) were discussed in most detail and we also pay most attention to them in this report. Items (3) and (4) did not bring anything new when compared with the earlier invited presentations given by RUST and ZIRIN and therefore, we omit them.

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