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Vladimir Obridko   Submitted: 2008-12-09 09:31

It is shown that the contrast of coronal holes, just as their size, determines the velocity of the solar wind streams. More than 500 measurements in  284 А have been analyzed. The time interval under examination covers about 1500 days in the declining phase of cycle 23. All coronal holes recorded for this interval in the absence of coronal mass ejections have been studied. The comparison with some other parameters (e.g. density, temperature, magnetic field) was carried out. The correlations are rather high (0.70-0.89), especially during the periods of moderate activity, and could be used for everyday forecast. The contrast of coronal holes is rather small. On the average, it is 0.08 of the ambient solar atmosphere, ranging from 0.04 to 0.013.

Authors: Obridko, V.N.,Shelting, B.D., AND Asgarov, A.B.
Projects: SoHO-EIT

Publication Status: Solar Physics (submitted)
Last Modified: 2008-12-09 19:00
Go to main E-Print page  Solar neutrino variability and its implications for solar physics and neutrino physics  Magnetic flux emergence in the Sun  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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