Japan Geoscience Union Meeting 2014

Presentation information

Poster

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM35_2PO1] Plasma Astrophysics: simulation technique, method of data analysis/visualization

Fri. May 2, 2014 4:15 PM - 5:30 PM Poster (5F)

Convener:*Matsukiyo Shuichi(Department of Earth System Science and Technology, Kyushu University), Ryoji Matsumoto(Chiba University)

4:15 PM - 5:30 PM

[PEM35-P01_2] Development of magnetic field tracking module for analyzing a decaying sunspot

*Shota KATO1, Shinsuke IMADA1, Shinobu MACHIDA1 (1.Solar-Terrestrial Environment Laboratory, Nagoya University)

Keywords:sunspot, development of module, auto detection, auto tracking

In order to analyze the structures of magnetic fields using the data from Solar Optical Telescope (SOT) on board the Hinode satellite, we have developed the automatic tracking module, which detects the magnetic region and tracks the time variation of each region.
The module, based on three thresholds, intensity, size, and distance, has main three functions: (1) detect the magnetic fields based on the intensity threshold, (2) remove the micro region by the size threshold, (3) based on move distance by time variation, detect the same regions and track them.
We made simple sample data for test and checked on the accuracy of our tracking module.
We applied the module to sunspot and analyzed the time variation of decaying sunspot which is one of the sources of magnetic element in the solar surface.
We have use the magnetograph data which was observed by Hinode/SOT from 29 Dec 2009 to 2 Jan 2010. We also discuss the north-south/east-west asymmetry of the decaying process in the active region.