Abstract
From improved spicule filtergrams obtained with the Sacramento Peak vacuum telescope we measured some spicule properties. The spicule diameter of 950 km was well resolved. A small decrease of diameter with height was observed confirming older observations. The expansion of the spicule was found to be at least an order of magnitude less than reported by Mouradian. Spicule counts are very sensitive to the threshold intensity of the observations. Counts, and their dependence on threshold intensity, height and wavelength are reported.
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On leave from the Astronomy Department, University of Texas, Austin, Texas.
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Lynch, D.K., Beckers, J.M. & Dunn, R.B. A morphological study of solar spicules. Sol Phys 30, 63–70 (1973). https://doi.org/10.1007/BF00156173
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DOI: https://doi.org/10.1007/BF00156173