Pervasive variability in the quiet solar transition region

Details Pervasive variability in the quiet solar transition region Pervasive variability in the quiet solar transition region

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...398..665r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 398, no. 2, p. 665-681.

Astronomy and Astrophysics

Astrophysics

19

Solar Activity, Solar Magnetic Field, Variability, Image Analysis, Monte Carlo Method, Spatial Distribution, Statistical Analysis, Time Series Analysis

Scientific paper

Extreme UV spectroheliograms from an experimental time series are employed to investigate the nature of the quiet solar transition region with respect to temporal variability. A statistical treatment is developed to analyze the fraction of spatial elements that yield intensity variations significantly higher than the signal noise. The EUV intensity in every spatial resolution varies on a time scale of minutes by about 10-30 percent, and the fractional amplitude of the temporal variations is found to be nearly independent of mean intensity. The paper concludes that the quiet solar transition region is probably generated and modulated by small-scale magnetic activity, since the temporal variability in the transition region is spatially uniform and rather pervasive.

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