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A study of spicules from space observations

Published online by Cambridge University Press:  01 September 2008

Ioannis Kontogiannis ,
Georgia Tsiropoula  and
Kostas Tziotziou
Ioannis Kontogiannis
Affiliation:
Institute for Space Applications and Remote Sensing, National Observatory of Athens, Lofos Koufos GR-15236 Palea Penteli, Greece email: jkonto@space.noa.gr; georgia@space.noa.gr; kostas@space.noa.gr Section of Astrophysics, Astronomy & Mechanics, Physics Department, University of Athens, Panepistimiopolis Zografou, GR-15784 Athens, Greece
Georgia Tsiropoula
Affiliation:
Institute for Space Applications and Remote Sensing, National Observatory of Athens, Lofos Koufos GR-15236 Palea Penteli, Greece email: jkonto@space.noa.gr; georgia@space.noa.gr; kostas@space.noa.gr
Kostas Tziotziou
Affiliation:
Institute for Space Applications and Remote Sensing, National Observatory of Athens, Lofos Koufos GR-15236 Palea Penteli, Greece email: jkonto@space.noa.gr; georgia@space.noa.gr; kostas@space.noa.gr
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Abstract

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We have studied spicules observed at the northern solar limb by using simultaneous high resolution image sequences. The images were obtained by Hinode/SOT (in the Ca II H passband) and TRACE (in the 1600 Å passband) during a coordinated campaign. Both data sets were reduced and then carefully co-aligned in order to compare the observed patterns in this highly dynamic region of the Sun. The identification of individual structures in both spectral bands allows us to trace their spatial and temporal behaviour. Persistent intensity variations at certain locations, indicate that at least some spicules have a recurrent behavior. Using wavelet analysis we investigate oscillatory phenomena along the axis of off-limb spicules and we construct 2-D maps of the solar limb with the observed oscillations.

Keywords

sun:chromospheresun:oscillations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S257: Universal Heliophysical Processes , September 2008 , pp. 165 - 167
Copyright
Copyright © International Astronomical Union 2009

References

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Torrence, C. & Compo, G. P. 1998, Bull.Amer.Meteor.Soc., 79, 612.0.CO;2>CrossRefGoogle Scholar
Tziotziou, K., Tsiropoula, G., & Mein, P. 2004, A&A, 423, 1133Google Scholar