Spicules
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Type II spicules at the solar limb (1/2)
Swedish 1-m Solar Telescope
Type II spicules are dynamic short-lived chromospheric jets seen at the limb (the Sun's edge). They live only for some minutes and have a swaying and torsional motion. They are believed to transfer mass from the chromosphere to the transition region and corona. They loosely follow the magnetic field lines sticking out of the Sun.
These images show the solar limb in the H I 6563 Å spectral line, or H-alpha. The data were taken in the blue wing of the line, at −1.2 Å from the line center, with the CRISP Imaging Spectropolarimeter at the Swedish 1-m Solar Telescope. Type II spicules are the thin, elongated and bright structures observed off-limb in the image. Rapid-blueshifted events (RBEs) are the thin, elongated, dark features observed on-disk. The images are filtered to remove intensity gradients toward and off the limb.
Image credit: Håkon Skogsrud (ITA, University of Oslo)
Observations: Yong Lin, Dan Sekse, Luc Rouppe van der Voort, Ada Ortiz, Viggo Hansteen (ITA, University of Oslo)