Results 11 to 20 of about 5,382 (223)
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 Fields of Solar Active Regions [PDF]
Proceedings of the International Astronomical Union, 2004 After briefly summarizing the outstanding achievements and new tendencies witnessed in recent years in the studies of magnetic fields of solar active regions (ARs), we focus on the current understanding on flux appearance and disappearance. On flux appearance, the moving magnetic features (MMFs) stand still as a mystery in solar physics, although the ...
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Expulsion of Counter Evershed Flows from Sunspot Penumbrae
The Astrophysical Journal, 2023 In addition to the Evershed flow directed from the umbra toward the outer boundary of a sunspot, under special circumstances a counter Evershed flow (CEF) in the opposite direction also occurs.
J. S. Castellanos Durán +2 more
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Rapid Decay of a Penumbral Sector Associated with a Strong Light Bridge in Active Region NOAA 12680
The Astrophysical Journal, 2023 We present observations of the rapid decay of a penumbral sector associated with a strong light bridge (LB) in the active region NOAA 12680 by analyzing the scattered light-corrected Solar Dynamics Observatory/Helioseismic and Magnetic Imager data.
Qiaoling Li +5 more
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Record-breaking Coronal Magnetic Field in Solar Active Region 12673 [PDF]
The Astrophysical Journal Letters, 2019 Abstract The strongest magnetic fields on the Sun are routinely detected at dark sunspots. The magnitude of the field is typically about 3000 G, with only a few exceptions that reported the magnetic field in excess of 5000 G. Given that the magnetic field decreases with height in the solar atmosphere, no coronal magnetic field above ...
Sergey A. Anfinogentov +3 more
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Magnetic Field Topology in Solar Active Regions [PDF]
International Astronomical Union Colloquium, 1993 AbstractIn solar active regions, over extended periods of time the plasma-magnetic field configuration evolves quasistatically through a sequence of nearly force-free equilibrium states. This evolution may be understood as the continual distortion of an existing equilibrium by wavelike disturbances propagating upward from the photosphere and subsequent
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Solar Flare Prediction and Magnetic Field Evolution in Solar Active Region [PDF]
Highlights of Astronomy, 2002 AbstractThe authors propose a number of empirical criteria for prediction of solar flares based on many years of observations at Huairou Solar Observing Station of Beijing Astronomical Observatory.
H.N. Wang +3 more
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The Astrophysical Journal, 2023 We analyze the forces that control the dynamic evolution of a flux rope eruption in a three-dimensional radiative magnetohydrodynamic simulation. The confined eruption of the flux rope gives rise to a C8.5 flare. The flux rope rises slowly with an almost
Can Wang +3 more
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Chromospheric Magnetic Field of Solar Active Regions
The Astrophysical Journal, 2001 The three-dimensional magnetic field structure of 137 solar active regions is studied by comparing the observed and computed chromospheric magnetograms. The model chromospheric field is obtained by extrapolating the observed photospheric field into the chromosphere with a potential (current-free) magnetic-field model in Cartesian geometry.
Debi Prasad Choudhary +2 more
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Light Bridge and Magnetic Field in a Solar Active Region
The Astrophysical Journal, 2022 Abstract Observational data from the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory and the multiwavelength simultaneous imaging system attached to the New Vacuum Solar Telescope located at Fuxian Lake, China are employed for the study of light bridges and magnetic fields in the active region NOAA 12529. Coronal
Huaning Wang +4 more
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