436 citations · 918 across the 23 of their papers we have counts for
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astro-ph.SR2014★ 8 cited
Statistical Analysis of Current Helicity and Twist in Solar Active Regions over the Phases of the Solar Cycle Using the Spectro-Polarimeter Data of Hinode
Kenichi Otsuji, Takashi Sakurai, Kirill Kuzanyan
Current helicity and twist of solar magnetic fields are important quantities to characterize the dynamo mechanism working in the convection zone of the Sun. We have carried out a s…
astro-ph.SR2014★ 6 cited
Morphological study of penumbral formation
Reizaburo Kitai, Hiroko Watanabe, Ken'ichi Otsuji
Penumbrae are known to be area of mainly horizontal magnetic field surrounding umbrae of relatively large and mature sunspots. In this paper, we observationally studied the formati…