Magnetic Field and Helicity in Solar Active Regions
نویسندگان
چکیده
منابع مشابه
Study of Magnetic Helicity in Solar Active Regions and Its Relationship with Solar Eruptions
STUDY OF MAGNETIC HELICITY IN SOLAR ACTIVE REGIONS AND ITS RELATIONSHIP WITH SOLAR ERUPTIONS by Sung-Hong Park It is generally believed that eruptive phenomena in the solar atmosphere such as solar flares and coronal mass ejections (CMEs) occur in solar active regions with complex magnetic structures. The magnetic complexity is quantified in terms of twists, kinks, and interlinkages of magnetic...
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Recent observational evidence for magnetic field direction effects on helioseismic signals in sunspot penumbrae is suggestive of magnetohydrodynamic (MHD) mode conversion occurring at lower levels. This possibility is explored using wave mechanical and ray theory in a model of the Sun’s surface layers permeated by uniform inclined magnetic field. It is found that fastto-slow conversion near the...
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We present calculations of helicity based on our solar dynamo model and show that the results are consistent with observational data.
متن کاملThe Origin of Helicity in Solar Active Regions
We present calculations of helicity based on our solar dynamo model and show that the results are consistent with observational data.
متن کاملEvolution of Magnetic Helicity and Energy Spectra of Solar Active Regions
We adopt an isotropic representation of the Fourier-transformed two-point correlation tensor of the magnetic field for estimating magnetic energy and helicity spectra as well as current helicity spectra of individual active regions and the change of their spectral indices with the solar cycle. The departure of the spectral index of current helicity from 5/3 is analyzed, and it is found that it ...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 2005
ISSN: 1539-2996
DOI: 10.1017/s1539299600015240