Results 21 to 30 of about 1,232 (254)
Splitting and Reconstruction of a Solar Filament Caused by Magnetic Emergence and Reconnection
The Astrophysical Journal, 2023 We present observations and interpretation of a nonerupting filament in NOAA active region (AR) 12827 that undergoes splitting and restructuring on 2021 June 4, using the high-resolution data obtained by the New Vacuum Solar Telescope, the Solar Dynamics
Zhike Xue +6 more
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On magnetic reconnection and flux rope topology in solar flux emergence [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 We present an analysis of the formation of atmospheric flux ropes in a magnetohydrodynamic (MHD) solar flux emergence simulation. The simulation domain ranges from the top of the solar interior to the low corona. A twisted magnetic flux tube emerges from the solar interior and into the atmosphere where it interacts with the ambient magnetic field.
MacTaggart, David, Haynes, Andrew Lewis
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Novel Approach to Forecasting Photospheric Emergence of Active Regions
The Astrophysical Journal Letters, 2023 One key aspect of understanding the solar dynamo mechanism and the evolution of solar magnetism is to properly describe the emergence of solar active regions.
S. S. A. Silva +11 more
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Direct evidence that twisted flux tube emergence creates solar active regions
Nature Communications, 2021 Twisted flux tubes are prominent candidates for the progenitors of solar active regions. Here, the authors show a clear signature of the emergence of pre-twisted magnetic flux tubes using magnetic winding, which detects the emerging magnetic topology ...
D. MacTaggart +4 more
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The emergence of magnetic flux through a partially ionised solar atmosphere [PDF]
Astronomy & Astrophysics, 2006 We present results from 2.5D numerical simulations of the emergence of magnetic flux from the upper convection zone through the photosphere and chromosphere into the corona. Certain regions of the solar atmosphere are at sufficiently low temperatures to be only partially ionised, in particular the lower chromosphere.
Leake, J. E. (James E.), Arber, T. D.
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Impact of Anomalous Active Regions on the Large-scale Magnetic Field of the Sun
The Astrophysical Journal, 2023 One of the major sources of perturbation in the solar cycle amplitude is believed to be the emergence of anomalous active regions that do not obey Hale’s polarity law and Joy’s law of tilt angles.
Shaonwita Pal +3 more
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Modelling magnetic flux emergence in the solar convection zone [PDF]
Astronomy & Astrophysics, 2012 12 pages, 15 figures, 2 tables.
Bushby PJ, Archontis V
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Magnetic flux emergence: a precursor of solar plasma expulsion [PDF]
Astronomy & Astrophysics, 2012 Aims. We model the emergence of magnetized plasma from the top of the convection zone to the lower corona. We investigate the eruption of coronal flux ropes above emerging flux regions.Methods. We performed three-dimensional numerical experiments in which the time-dependent and resistive equations of MHD are solved self-consistently, using the Lare3D
V. Archontis, A. W. Hood
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Solar magnetic fields - The generation of emerging flux
The Astrophysical Journal, 1981 X-ray observations have provided information about magnetic fields on the sun, and the implications of these observations are discussed. The pattern of small-scale flux emergence is quite different from that of active regions. It is inferred that the small-scale fields originate fairly high in the convective zone, while the fields in active regions ...
L. Golub +3 more
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Formulating Mass-loss Rates for Sun-like Stars: A Hybrid Model Approach
The Astrophysical Journal, 2023 We observe an enhanced stellar wind mass-loss rate from low-mass stars exhibiting higher X-ray flux. This trend, however, does not align with the Sun, where no evident correlation between X-ray flux and mass-loss rate is present.
Munehito Shoda +2 more
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