image: At the limb of the Sun, many jets shoot from the surface, as shown in the top image taken with the NASA IRIS spectrograph. In the middle panel, a numerical model is shown able to simulate these jets. In the bottom image taken with the Swedish 1-m Solar Telescope at the Roque de los Muchachos (La Palma, Spain), the jets are observed in the disc center of the Sun look like shortlived thin filament structures with seen at the blue shifted position in the spectrum since they are coming towards us. This material relates to a paper that appeared in the June 23, 2017, issue of Science, published by AAAS. The paper, by J. Martínez-Sykora at Bay Area Environmental Research Institute in Petaluma, CA, and colleagues was titled, 'On the generation of solar spicules and Alfvén waves.' view more
Credit: NASA IRIS spectrograph, Bifrost code developed at the University of Oslo, and Swedish 1-m Solar Telescope at the Roque de los Muchachos (La Palma, Spain)