搜索结果: 1-11 共查到“天文学 helicity”相关记录11条 . 查询时间(0.132 秒)
On the injection of helicity by shearing motion of fluxes in relation to Flares and CMEs
activity flares magnetic fields Coronal Mass ejections magnetic polarity inversion line
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2012/2/24
An investigation of helicity injection by photospheric shear motions is presented for two active regions, NOAA 11158 and 11166, using LOS magnetic field observations obtained from the Helioseismic and...
Helicity and dynamo action in magnetized stellar radiation zones
magnetohydrodynamics (MHD) – instabilities – stars: magnetic fi elds – stars: interiors
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2011/10/8
Helicity and \alpha effect driven by the nonaxisymmetric Tayler instability of toroidal magnetic fields in stellar radiation zones are computed. In the linear approximation a purely toroidal field alw...
Spectroscopic evidence for helicity in explosive events
Sun: UV radiation—Sun: transition region— Sun: chromosphere
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2011/9/30
We report spectroscopic observations in support of a novel view of transition region explosive events, observations that lend empirical evidence that at least in some cases explosive events may be not...
Cross-helicity effects and turbulent transport in magnetohydrodynamic flow
Cross-helicity effects turbulent transport magnetohydrodynamic
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2011/9/28
In the presence of large-scale vortical motions and/or magnetic-field strains, the turbulent cross helicity (velocity--magnetic-field correlation in fluctuations) may contribute to the turbulent elect...
Magnetic helicity transport in the advective gauge family
Magnetic helicity transport the advective gauge family
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2011/1/13
Magnetic helicity fluxes are investigated in a family of gauges in which the contribution from ideal magnetohydrodynamics takes the form of a purely advective flux. Numerical simulations of magnetohyd...
Phase transition to the state with nonzero average helicity in dense neutron matter
Phase transition nonzero average dense neutron matter
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2010/11/16
The possibility of the appearance of the states with a nonzero average helicity in neutron matter is studied in the model with the Skyrme effective interaction. By providing the analysis of the selfco...
Helicity of Solar Active Regions from a Dynamo Model
MHD—Sun activity—Sun magnetic fields—sunspots
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2010/9/16
We calculate helicities of solar active regions based on the idea that poloidal flux lines get wrapped around a toroidal flux tube rising through the convection zone, thereby giving rise to the helici...
What Helicity Can Tell Us about Solar Magnetic Fields
Sun magnetic fields helicity
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2010/9/15
Concept of magnetic/current helicity was introduced to solar physics about 15 years ago. Earlier studies led to discovery of such fundamental properties as hemispheric helicity rule, and role of helic...
Helicity of Solar Active Regions from a Dynamo Model
MHD Sun:activity Sun:magnetic fields sunspots
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2009/5/7
We calculate helicities of solar active regions based on the idea that poloidal flux lines get wrapped around a toroidal flux tube rising through the convection zone, thereby giving rise to the helici...
What Helicity Can Tell Us about Solar Magnetic Fields
Sun magnetic fields helicity
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2009/5/5
Concept of magnetic/current helicity was introduced to solar
physics about 15 years ago. Earlier studies led to discovery of such fundamental
properties as hemispheric helicity rule, and role of he...
Helicity Thinkshop on Solar Physics（太阳螺度专题小型国际讨论会）（图）
太阳螺度 讨论会 Helicity Thinkshop Solar Physics
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2009/3/31
Magnetic helicity has been intensively studied concerning the observation, dynamo theory and many other relevant academic areas. This meeting would like to invite solar physicists who are active in th...