Results 11 to 20 of about 3,285 (232)
Formation of a Long Filament Through the Connection of Two Filament Segments Observed by CHASE
The Astrophysical Journal Letters, 2023 We present imaging and spectroscopic diagnostics of a long filament during its formation with the observations from the Chinese H α Solar Explorer and Solar Dynamics Observatory.
H. T. Li +7 more
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CHIRALITY AND MAGNETIC CONFIGURATIONS OF SOLAR FILAMENTS [PDF]
The Astrophysical Journal, 2017 ABSTRACT It has been revealed that the magnetic topology in the solar atmosphere displays hemispheric preference, i.e., helicity is mainly negative/positive in the northern/southern hemispheres, respectively. However, the strength of the hemispheric rule and its cyclic variation are controversial.
Y. Ouyang (欧阳雨) +3 more
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Magnetic Twists of Solar Filaments [PDF]
The Astrophysical Journal, 2021 Abstract Solar filaments are cold and dense materials situated in magnetic dips, which show distinct radiation characteristics compared to the surrounding coronal plasma. They are associated with coronal sheared and twisted magnetic field lines.
J. H. Guo +5 more
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Filaments and the Solar Dynamo [PDF]
International Astronomical Union Colloquium, 1998 AbstractFilaments are a global phenomenon and their formation, structure and dynamics are determined by magnetic fields. So they are an important signature of the solar magnetism. The central mechanism in traditional mean-field dynamo theory is the alpha effect and it is a major result of this theory that the presence of kinetic or magnetic helicities ...
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Dynamics of Threads Wrapping a Filament's Leg Prior to the Eruption on 2021 October 28
The Astrophysical Journal, 2023 Although the magnetic field structures of solar filaments have been studied for several decades, the detailed evolution of the structure around a filament prior to its eruption is rarely observed. On 2021 October 28 in AR 12887, a major solar flare (X1.0
Yue Fang, Jun Zhang, Yi Bi, Zhiping Song
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Midterm periods of solar filaments [PDF]
Journal of Geophysical Research: Space Physics, 2014 Abstract On the basis of the Carte Synoptique catalogue of solar filaments from March 1919 to December 1989, we measure power spectra of detrended full‐disk (FSFNs, latitudinal bands: 0 ∘ –90 ∘ ), low‐latitude (LSFNs, latitudinal bands:
Peng Zou, Qixiu Li
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Quantification of the Writhe Number of the Evolution of Solar Filament Axes
The Astrophysical Journal, 2023 Solar filament eruptions often show complex and dramatic geometric deformation that is highly relevant to the underlying physical mechanism triggering the eruptions.
Zhenjun Zhou +5 more
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On rotation of solar filaments [PDF]
Proceedings of the International Astronomical Union, 2006 The study of the differential rotation law is an important issue in solar physics. Earlier studies of filaments found formulae for their differential rotation at stable existence stage. This paper relies on Big Bear Solar Observatory H-alpha filtergrams to estimate angular velocities of quiescent filaments at different stages of existence.
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SYMPATHETIC SOLAR FILAMENT ERUPTIONS [PDF]
The Astrophysical Journal Letters, 2016 ABSTRACT The 2015 March 15 coronal mass ejection as one of the two that together drove the largest geomagnetic storm of solar cycle 24 so far was associated with sympathetic filament eruptions. We investigate the relations between the different filaments involved in the eruption.
Rui Wang +5 more
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Latitude migration of solar filaments [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 The Carte Synoptique catalogue of solar filaments from March 1919 to December 1989, corresponding to complete cycles 16 to 21 is utilized to show latitudinal migration of filaments at low latitudes (less than 50 deg), and the latitudinal drift of solar filaments in each hemisphere in each cycle of the time interval is compared with the corresponding ...
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