Statistical Study on the Nature of Solar Flux Emergence
Kenichi Otsuji, Reizaburo Kitai, Kiyoshi Ichimoto, and Kazunari, Shibata
TL;DR
This study analyzes 101 solar flux emergence events to understand how magnetic flux influences emergence behavior, revealing size-dependent flow patterns, elementary emergence units, and power-law relations between flux and emergence characteristics.
Contribution
It provides a comprehensive statistical analysis linking magnetic flux to emergence modes, flow patterns, and spatial scales, supported by observational data and simulation comparisons.
Findings
Large flux regions show converging flows between polarities.
Small ephemeral regions exhibit diverging flow patterns.
Emergence events consist of elementary units of about 4 Mm in size.
Abstract
We studied 101 flux emergence events ranging from small ephemeral regions to large emerging flux regions which were observed with Hinode Solar Optical Telescope filtergram. We investigated how the total magnetic flux of the emergence event controls the nature of emergence. To determine the modes of emergences, horizontal velocity fields of global motion of the magnetic patches in the flux emerging sites were measured by the local correlation tracking. Between two main polarities of the large emerging flux regions with more than around 2 \times 10^19 Mx, there were the converging flows of anti-polarity magnetic patches. On the other hand, small ephemeral regions showed no converging flow but simple diverging pattern. When we looked into the detailed features in the emerging sites, irrespective of the total flux and the spatial size, all the emergence events were observed to consist of…
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