Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-10-14
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures, to appear in proceedings of 11th European Solar Physics Meeting, Leuven, 11-16 September, 2005
Scientific paper
Height series of Doppler observation at the solar limb (covering 3800 - 8700 km distance above the photosphere) in $H_{\alpha}$ spectral line obtained by big coronagraph of Abastumani Astrophysical Observatory \citep{khu} show the periodic spatial distribution of Doppler velocities in spicules. We suggest that the periodic spatial distribution is caused by propagating kink waves in spicule. The wave length is found to be $\sim$ 3500 km. Numerical modelling of kink wave propagation from the photosphere to observed heights gives the wave length of kink waves at the photosphere to be $\sim$ 1000 km, which indicates to the granular origin of the waves. The period of waves is estimated to be in the range of 35-70 s.
Khutsishvili Eldar
Kukhianidze Vasil
Zaqarashvili Teimuraz V.
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