Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...444..257o&link_type=abstract
Astronomy and Astrophysics, Volume 444, Issue 1, December II 2005, pp.257-264
Astronomy and Astrophysics
Astrophysics
2
Sun: Photosphere, Sun: Granulation, Sun: Oscillations
Scientific paper
Time series of 1D spectrograms are used to study the influence of the 5-min oscillations on intensity and velocity fields of different layers of the quiet solar photosphere. We study the continuum intensity field along with intensity and corresponding velocity patterns of the mid and upper photosphere, obtained from two Fe lines. Oscillations seem to dominate the intensity and velocity fields of the higher atmospheric layers. Our results confirm the fast decay of the granular intensity structure with height. From correlations of temperature structures at three different photospheric levels we conclude that there are rapid changes of the structures in the lower photosphere, which are valid for the duration of the time series, while for the upper levels changes of the stuctures are fainter and show significant periodic character. The velocity pattern, on the other hand, shows a periodic propagation through the photosphere. The tests of the influence of seeing conditions on the data are considered.
Hanslmeier Arnold
Kučera Antonín
Odert Petra
Rybák Ján
Wöhl Hubertus
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