Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...522..540p&link_type=abstract
The Astrophysical Journal, Volume 522, Issue 1, pp. 540-546.
Astronomy and Astrophysics
Astronomy
33
Sun: Corona, Sun: Transition Region, Sun: Uv Radiation
Scientific paper
We report here the results of a study of the temperature variation of the network boundary thicknesses in the quiet-Sun transition region. A Fourier-based two-dimensional autocorrelation method has been applied to 240^''x240^'' rasters obtained in several transition-region lines by the CDS spectrometer on SOHO. The quantitative variation of the network boundary width with temperature has been obtained for the first time in a full two-dimensional field. It appears that network boundaries have an almost constant width up to a temperature of about 10^5.4 K and then fan out rapidly at coronal temperatures. This expansion of the transition-region network boundaries with temperature is found to be quantitatively in agreement with earlier theoretical models of the transition region.
Bellamine Narjès
Gabriel Alan H.
Patsourakos Spiros
Vial Jean-Claude
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