Characterizing 3D Magnetic Structures in Sunspot Light Bridges
The Astrophysical Journal, 2023 Light bridges (LBs) are narrow structures dividing sunspot umbra, and their role in active region evolution is yet to be explored. We investigated the magnetic structure of the two LBs: a narrow LB (with width ∼810 km) and a considerably wider LB (2475 ...
Ju Jing +5 more
doaj +1 more source
Toward Improved Understanding of Magnetic Fields Participating in Solar Flares: Statistical Analysis of Magnetic Fields within Flare Ribbons [PDF]
Astrophysical Journal, 2021 Violent solar flares and coronal mass ejections (CMEs) are magnetic phenomena. However, how magnetic fields reconnecting in the flare differ from nonflaring magnetic fields remains unclear owing to the lack of studies of the flare magnetic properties ...
M. Kazachenko +4 more
semanticscholar +1 more source
The Astrophysical Journal Supplement Series, 2023 It is well accepted that the physical properties obtained from the solar magnetic field observations of active regions (ARs) are related to solar eruptions.
Jingjing Wang +3 more
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Magnetic field variations and seismicity of solar active regions [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2009 Abstract Dynamical changes in the solar corona have proven to be very important in inducing seismic waves into the photosphere. Different mechanisms for their generation have been proposed. In this work, we explore the magnetic field forces as plausible mechanisms to generate sunquakes as proposed by Hudson, Fisher & Welsch.
Martinez-Oliveros, J. C., Donea, A. -C.
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STRUCTURE AND STABILITY OF MAGNETIC FIELDS IN SOLAR ACTIVE REGION 12192 BASED ON NONLINEAR FORCE-FREE FIELD MODELING [PDF]
, 2016 We analyze a three-dimensional (3D) magnetic structure and its stability in large solar active region (AR) 12192, using the 3D coronal magnetic field constructed under a nonlinear force-free field (NLFFF) approximation.
S. Inoue, K. Hayashi, K. Kusano
semanticscholar +1 more source
A First Spectroscopic Measurement of the Magnetic-field Strength for an Active Region of the Solar Corona [PDF]
Astrophysical Journal, 2020 For all involved in astronomy, the importance of monitoring and determining astrophysical magnetic-field strengths is clear. It is also a well-known fact that the corona magnetic fields play an important part in the origin of solar flares and the ...
R. Si +5 more
semanticscholar +1 more source
Flows and Nonthermal Velocities in Solar Active Regions Observed with the EUV Imaging Spectrometer on Hinode: A Tracer of Active Region Sources of Heliospheric Magnetic Fields? [PDF]
, 2008 From Doppler velocity maps of active regions constructed from spectra obtained by the EUV Imaging Spectrometer (EIS) on the Hinode spacecraft we observe large areas of outflow (20-50 km s−1) that can persist for at least a day.
G. Doschek +6 more
semanticscholar +1 more source
The solar active region magnetic field and energetics [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractMotivated by increasingly more advanced solar observations, we recently develop a method of coronal magnetic field extrapolation, especially for an active region (sunspot region). Based on a more complex variational principle, the principle of minimum (energy) dissipation rate (MDR), we adopt and solve a more complex equation governing the ...
Qiang Hu +4 more
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Association Between Magnetic Pressure Difference and the Movement of Solar Pores
The Astrophysical Journal, 2023 Solar pores are closely related to the concentration, dissipation, and transportation of solar magnetic flux. Their observable characteristics can provide constraints on models and simulations of magnetic flux emergence and formation.
Merlin M. Mendoza, Chia-Hsien Lin
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Magnetic Field Reconstruction in a Solar Active Region [PDF]
Symposium - International Astronomical Union, 2001 Supposing coronal magnetic fields are in a force-free state from the chromosphere to the height of two solar radii, we reconstruct 3D force-free magnetic fields by making use of a new numerical technique, in which the fields are represented by a boundary integral equation based on a specific Green's function.
H. Wang, Y. Yan, T. Sakurai
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