منابع مشابه
Magnetic Structure of Sunspots
In this review we give an overview about the current state-of-knowledge of the magnetic field in sunspots from an observational point of view. We start by offering a brief description of tools that are most commonly employed to infer the magnetic field in the solar atmosphere with emphasis in the photosphere of sunspots. We then address separately the global and local magnetic structure of suns...
متن کاملThe dynamical disconnection of sunspots from their magnetic roots
After a dynamically active emergence phase, magnetic flux at the solar surface soon ceases to show strong signs of the subsurface dynamics of its parent magnetic structure. This indicates that some kind of disconnection of the emerged flux from its roots in the deep convection zone should take place. We propose a mechanism for the dynamical disconnection of the surface flux based upon the buoya...
متن کاملThe effect of magnetic field on the magnetic property of Agar/Fe3O4 nanocomposite
Agar/Fe3O4 nanocomposites were synthesized in the presence of an external magnetic field (~ 0.4 Tesla) and their characteristics were compared with the samples synthesized without considering the external magnetic field. In this study we used Fe2+ and Fe3+ for synthesizing Fe3O4 magnetic nanoparticles in the presence of agar as polymeric additive, by co-precipitation technique. Vibrating sample...
متن کاملThe Study of Improvement of Dispersive Soil Using Magnetic Field
In this study, the feasibility of using magnetic technology to reduce the dispersion of soil has been investigated. The reference treatment was potable water and 3 magnetic water devices (with different magnetic intensities) were used for magnetizing the potable water. The results showed that the magnetic field has a significant effect in order of 5 percent on increasing of magnesium concentrat...
متن کاملA theory of the Earth’s magnetic field and of sunspots, based on a self-excited dynamo incorporating the Hall effect
A new viewpoint on the generation and maintenance of the Earth’s magnetic field is put forward, which integrates self-exciting dynamo theory with the possibility of energy coupling along orthogonal axes provided by the Hall effect. A nonlinear third-order system is derived, with a fourth equation serving as an observer of unspecified geophysical processes which could result in field reversal. L...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1934
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/94.5.469