Fine structure of the Solar Chromosphere: Arch-Shaped Mottles

Details Fine structure of the Solar Chromosphere: Arch-Shaped Mottles Fine structure of the Solar Chromosphere: Arch-Shaped Mottles

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999soph..184...77z&link_type=abstract

Solar Physics, v. 184, Issue 1, p. 77-86 (1999).

Physics

6

Scientific paper

We analyze a time series of high resolution observations near the solar limb, obtained in Hα and the Mgb1 line. We identified arch-shaped dark mottles, which are thin, faint Hα structures observable under very good seeing conditions, best seen in Hα +0.75Å. Their mean length is about 15'', their mean height about 6'' and indicative lifetimes is of the order of 5min. 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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