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A statistical analysis of large-scale brightness and velocity fluctuations in the solar atmosphere

✍ Scribed by I. Appenzeller; E. H. Schröter

Publisher
Springer
Year
1968
Tongue
English
Weight
537 KB
Volume
4
Category
Article
ISSN
0038-0938

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✦ Synopsis

Simultaneous photoelectric recordings of the intensities and the Doppler shifts in 5 Fraunhofer lines (lift, NaD1, Mgb2, Fe25123, Fe25223) were used to study the structure of local largescale fluctuations of the intensity and velocity in different layers of the solar atmosphere. We derived the autocorrelation and cross-correlation functions and the powerspectra of the fluctuations. Fluctuation patterns with a characteristic size of 3-4 • 104 km were found in all observed lines. The intensity of the fluctuations decreases sharply from the chromospheric Hfl-core to the weak iron lines. The results are discussed in terms of the solar supergranulation pattern. * 0 is the angle between the direction to the observer and the normal to the solar surface.

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