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Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mwoc.conf...83k&link_type=abstract
Multi-Wavelength Observations of Coronal Structure and Dynamics -- Yohkoh 10th Anniversary Meeting. Proceedings of the conferenc
Other
Scientific paper
The magnetic field in the Sun is created near the bottom of convective layer and some of them emerges through convective zone as emerging flux loops. Flares, surges and other active phenomena can be triggered by the emerging flux which is affected by surrounding convective motion and convective structure can play an important role in basic mechanism of such active events. We observed emerging flux region NOAA 8582 in the G-band wavelength from 21:00UT to 23:30UT on 1999 June 11 with Real-time Frame Selector2 (RTFS2) installed in Domeless Solar Telescope in Hida Observatory, Kyoto University. We observed simultaneously H alpha center and its wing wavelength with Lyot filter system. We can see many emerging flux loops and surge activities during the observation period in H alpha data set. We applied Local Correlation Tracking Method (LCTM) to the G-band data set and derived horizontal convective structure in the upper convective zone from it. The resulting convective structure changed temporary and it can be interpreted as meso-scale convective structure. In addition to the varying convective structure we found a temporary continuous up-flow structure under emerging flux loops. The structure existed continually during the whole observation period and fixed to the position of middle of foot points of each flux loops. It means that the up-flow structure is characteristic of the emerging flux region.
Kitai Reizaburo
Kozu Hiromichi
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