Abstract
Variations of solar emission in the spectral ranges corresponding to the transition region (304 Å) and corona (175 Å) and their relation to solar wind parameters are investigated for the maximum and declining phase of solar cycle 23 (2001–2004) based on the CORONAS-F/SPIRIT data. It is shown that the variations of solar flux in both ranges are similar and demonstrate a high correlation for long data series. Meanwhile, some time intervals were registered when the intensity variations at 304 Å are delayed with respect to those in 175 Å by, on average, two days. For long periods, the spectra of the full-disk flux at 175 Å and of the solar wind density are close to each other; the same is true for the solar flux spectrum in the 304-Å range and the spectrum of the solar wind velocity. The assumption is made that active processes in the lower corona mainly affect long-period density variations, while the velocity characterizes the kinetics of the total stream of the outflowing matter and its long-term variations are considerably related to the physics of processes occurring deeper in the Sun.
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Original Russian Text © O.V. Khabarova, S.V. Kuzin, S.A. Bogachev, A.A. Pertsov, 2006, published in Astronomicheskii Vestnik, 2006, Vol. 40, No. 4, pp. 372–378.
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Khabarova, O.V., Kuzin, S.V., Bogachev, S.A. et al. Solar flux variations at 175 and 304 Å and their relation to solar wind parameters. Sol Syst Res 40, 341–347 (2006). https://doi.org/10.1134/S0038094606040125
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DOI: https://doi.org/10.1134/S0038094606040125