Development of Real-Time Frame Selector 2 and the Characteristic Convective Structure in the Emerging Flux Region

Details Development of Real-Time Frame Selector 2 and the Characteristic Convective Structure in the Emerging Flux Region Development of Real-Time Frame Selector 2 and the Characteristic Convective Structure in the Emerging Flux Region

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pasj...57..221k&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.57, No.1, pp. 221-234

Astronomy and Astrophysics

Astronomy

1

Sun: Atmospheric Motions, Sun: Photosphere, Techniques: High Angular Resolution

Scientific paper

A new image-grabbing system, Real-Time Frame Selector 2 (RTFS2), was developed and installed in the Domeless Solar Telescope at Hida Observatory. The purpose of this system is to acquire high-quality images in ground-based observations. We observed the emerging flux region NOAA 8582 in the G-band wavelengths from 20:59 UT to 23:32 UT on 1999 June 11 with RTFS2. Simultaneous Hα line center and wing wavelength observations with a Lyot filter system showed emerging flux loops and surge activities in this region. We applied a Local Correlation Tracking Method to the G-band data set in order to derive the horizontal convective structure in the upper convective zone. In addition to a meso-scale convective structure, we found divergent-flow structures under emerging flux loops, which were stable during the whole observation period, and located at the middle of the foot points of each flux loop. We suggest that the divergent-flow structure is a newly found characteristic of emerging flux regions.

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