Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.0306k&link_type=abstract
American Astronomical Society, SPD meeting #42, #3.06; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We examined the wave signatures in a spicule observed by the Hinode SOT to present a quantitative and clear evidence of propagating transverse waves. Especially, we estimated the propagation wave speed in the spicule observed on 2008 June 3 in the north polar limb of the Sun. For this, we made time-slice stacks at different height of the spicule axis using time series images of the spicule. All time-slice stacks for 9 different heights show oscillation patterns with a period of about 130 s. We also investigated the cross-correlation among time-slice stacks to estimate the phase difference of the oscillation with height and its propagating speed. We found that the mean phase delay over the height difference of 3000 km is about 13 s. This result suggests that the oscillation is a propagating transverse wave and the propagating speed is about 220 km s-1. In addition, we found that the estimated speeds increased from 100 to 230 km s-1 over 5000 km height range and this is well explained by the density variation along the spicule structure.
Bong Suchan
Chae Jongchul
Cho Inyong
Cho Kihyeon
Kim Yeon Han
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