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

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Abstract

Simultaneous photoelectric recordings of the intensities and the Doppler shifts in 5 Fraunhofer lines (Hβ, Na D1, Mg b2, Feλ5123, Feλ5223) were used to study the structure of local large-scale 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 Hβ-core to the weak iron lines. The results are discussed in terms of the solar supergranulation pattern.

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Authors and Affiliations

  1. Göttingen, University Observatory, Germany

    I. Appenzeller & E. H. Schröter

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  1. I. Appenzeller
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  2. E. H. Schröter
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Appenzeller, I., Schröter, E.H. A statistical analysis of large-scale brightness and velocity fluctuations in the solar atmosphere. Sol Phys 4, 131–141 (1968). https://doi.org/10.1007/BF00148075

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  • DOI: https://doi.org/10.1007/BF00148075

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