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Title:
Dynamical structure of extreme ultraviolet macrospicules
Authors:
Karovska, Margarita; Habbal, Shadia Rifai
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, US), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, US)
Publication:
The Astrophysical Journal, Part 2 - Letters, vol. 431, no. 1, p. L59-L62 (ApJL Homepage)
Publication Date:
08/1994
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
Coronal Holes, Image Enhancement, Image Resolution, Solar Corona, Solar Limb, Spatial Resolution, Spicules, Sun, Temporal Resolution, Ultraviolet Astronomy, Extreme Ultraviolet Radiation, Skylab Program, Solar Magnetic Field, Solar Spectra, Solar Wind, Spectroheliographs
DOI:
10.1086/187472
Bibliographic Code:
1994ApJ...431L..59K

Abstract

We describe the substructures forming the macrospicules and their temporal evolution, as revealed by the application of an image enhancement algorithm to extreme ultraviolet (EUV) observations of macrospicules. The enhanced images uncover, for the first time, the substructures forming the column-like structures within the macrospicules and the low-lying arches at their base. The spatial and temporal evolution of macrospicules clearly show continuous interaction between these substructures with occasional ejection of plasma following a ballistic trajectory. We comment on the importance of these results for planning near future space observations of macrospicules with better temporal and spatial resolution.

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