The Institute for Solar Physics is operated as an independent institute, under the auspices of the Royal Swedish Academy of Sciences, but is associated with Stockholm University through its Department of Astronomy.
We operate the Swedish
1-meter Solar Telescope (SST) on La Palma, currently the most
highly resolving solar telescope in the world.
Data from the CRISP instrument at the SST show the presence of downflows in a sunspot penumbra.
The
results are published today
as
a Report in Science Express.
The authors are: Göran B. Scharmer, Vasco M.J. Henriques, Dan Kiselman, (all from the Institute for Solar Physics and the Department of Astronomy at Stockholm University), and Jaime de la Cruz Rodríguez (University of Oslo).
The conclusion is that the observed system of upflows and downflows must be convective in origin. This implies that the penumbra is largely powered by convection and that the Evershed effect is the horizontal component of these convective flows.
More information, images, and a movie.
Mer information pĺ svenska, bilder och en film.
Información en español y multimedia.