Dynamical fine structures of the chromosphere

Details Dynamical fine structures of the chromosphere Dynamical fine structures of the chromosphere

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ssrv...70...65t&link_type=abstract

Space Science Reviews, Volume 70, Issue 1-2, pp. 65-68

Physics

Sun, Chromosphere, Fine Structure

Scientific paper

We have studied the spatial structure and temporal evolution of a chromospheric region with chains of mottles at the junction of three supergranules. The observations were obtained with the Multichannel Subtractive Double Pass spectrograph operating in Hα at the Pic du Midi Observatory. From a statistical point of view the fine structures were stable in intensity over the observation period (15 min), while the line of sight velocity showed remarkable changes within a few minutes. A detailed analysis shows that the predominant pattern of bulk motion in the dark mottles is that of downflow at their footpoints and upflow at their tops, which is followed by downflows along the whole structure and that this process repeats itself several times during their lifetime.

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