28 citations · 102 across the 6 of their papers we have counts for
6 papers
Statistical distribution of current helicity in solar active regions over the magnetic cycle
Y. Gao, T. Sakurai, H. Zhang +2
The current helicity in solar active regions derived from vector magnetograph observations for more than 20 years indicates the so-called hemispheric sign rule; the helicity is pre…
The origin of the helicity hemispheric sign rule reversals in the mean-field solar-type dynamo
V. V. Pipin, H. Zhang, D. D. Sokoloff +2
Observations of proxies of the magnetic helicity in the Sun over the past two solar cycles revealed reversals of the helicity hemispheric sign rule (negative in the North and posit…
Helicity conservation in nonlinear mean-field solar dynamo
V. V. Pipin, D. D. Sokoloff, H. Zhang +1
We explore the impact of magnetic helicity conservation on the mean-field solar dynamo using the axisymmetric dynamo model which includes the subsurface shear. Our results support…
Turbulent cross-helicity in the mean-field solar dynamo problem
V. V. Pipin, K. M. Kuzanyan, H. Zhang +1
We study the dynamical and statistical properties of turbulent cross-helicity (correlation of the aligned fluctuating velocity and magnetic field components). We derive an equation…
Current Helicity and Twist as Two Indicators of The Mirror Asymmetry of solar Magnetic Fields
D. D. Sokoloff, H. Zhang, K. Kuzanyan +3
A comparison between the two tracers of magnetic field mirror asymmetry in solar active regions, twist and current helicity, is presented. It is shown that for individual active re…
The distribution of current helicity at the solar surface at the beginning of the solar cycle
D. Sokoloff, S. D. Bao, N. Kleeorin +5
A fraction of solar active regions are observed to have current helicity of a sign that contradicts the polarity law for magnetic helicity; this law corresponds to the well-known H…