Statistical Features of the Quiet Sun in EUV

Statistical Features of the Quiet Sun in EUV

Frequency distributions of the intensities of EUV emission lines in the quiet Sun have in the past usually been modelled using two Gaussians. Here we test this and other distribution functions against observed distributions with exceptional statistics. The data were obtained in a number of spectral...

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Veröffentlicht in:Symposium - International Astronomical Union 2001, Vol.203, p.416-418
Hauptverfasser: Pauluhn, A., Solanki, S. K., Rüedi, I., Landi, E., Schühle, U.
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Solanki, S. K.
Rüedi, I.
Landi, E.
Schühle, U.
description Frequency distributions of the intensities of EUV emission lines in the quiet Sun have in the past usually been modelled using two Gaussians. Here we test this and other distribution functions against observed distributions with exceptional statistics. The data were obtained in a number of spectral lines observed with CDS and SUMER. We show that the frequency distribution of the radiance is best modelled by a lognormal distribution. The fact that the radiance distribution of the quiet Sun including the network and the intranetwork is better reproduced by a single lognormal distribution function than by two Gaussians suggests that the same heating processes are acting in both types of features.
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