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On the generation of solar spicules and Alfvénic waves

De Pontieu, B.; Martínez-Sykora, J.; Hansteen, V. H. +3 more

In the lower solar atmosphere, the chromosphere is permeated by jets known as spicules, in which plasma is propelled at speeds of 50 to 150 kilometers per second into the corona. The origin of the spicules is poorly understood, although they are expected to play a role in heating the million-degree corona and are associated with Alfvénic waves tha…