Fine structure of the Solar Chromosphere: Arch-Shaped Mottles |
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| Authors: | Zachariadis ThG Georgakilas AA Koutchmy S Alissandrakis CE |
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| Institution: | (1) Research Center for Astronomy and Applied Mathematics, Academy of Athens, Greece;(2) National Observatory of Athens, Astronomical Institute, I. Metaxa and V. Paulou, Greece;(3) Institut d'Astrophysique de Paris, CNRS, 98 bis boulevard Arago, F-75014 Paris, France;(4) Section of Astro-Geophysics, Department of Physics, University of Ioannina, Greece |
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| Abstract: | We analyze a time series of high resolution observations near the solar limb, obtained in H and the Mg b1 line. We identified arch-shaped dark mottles, which are thin, faint H structures observable under very good seeing conditions, best seen in H +0.75 Å. Their mean length is about 15 , their mean height about 6 and indicative lifetimes is of the order of 5 min. They show negative (away from the observer) line-of-sight velocities. A possible interpretation is that material flows from the apex towards the feet of the arches. |
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