Spatial and temporal variations of EUV coronal bright points

Details Spatial and temporal variations of EUV coronal bright points Spatial and temporal variations of EUV coronal bright points

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...69...77h&link_type=abstract

Solar Physics, vol. 69, Jan. 1981, p. 77-97.

Physics

65

Chromosphere, Extreme Ultraviolet Radiation, Line Spectra, Solar Corona, Solar Radiation, Spatial Distribution, Brightness, Coronal Holes, Emission Spectra, Spectral Resolution, Spectroheliographs

Scientific paper

This paper reports results of an analysis of Skylab observations of coronal bright points made in EUV spectral lines formed in the chromosphere, chromospheric-coronal transition region and corona. The most important result is that the observed bright points exhibited large variations in EUV emission over time scales as short as 5.5 min, the temporal resolution of the data. In most cases strong enhancements in the coronal line were accompanied by strong enhancements in the chromospheric and transition region lines. The intensity variations appear to take place within substructures of the bright points, which most likely consist of miniature loops evolving on time scales of a few minutes. Coronal cooling times derived from the data are consistent with an intermittent, impulsive coronal heating mechanism for bright points.

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