The solar corona in cycle 23
作者： A. Fludra , J. Ireland , G. Del Zanna , W.T. Thompson
DOI: 10.1016/S0273-1177(01)00598-1
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摘要: The Coronal Diagnostic Spectrometer (CDS) on SOHO has been recording EUV spectra and monitoring time variability of line intensities, electron temperature density in the low solar corona during rising part Cycle 23. four-year data set includes daily synoptic observations four lines along central meridian since April 1996 weekly diagnostic above polar coronal holes July 1997. history intensities meridian, radial profiles regions at heights up to 1.15R⊙ are derived. photospheric magnetic flux also calculated for 50 active observed from June 1998. Variability temperature, density, spectral holes, quiet sun with cycle is discussed. Power-law relationships among CDS data, between field presented.
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