The Institute for Solar Physics is a national research infrastructure under the Swedish Research Council. It is managed as an independent institute 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.

1 October 2018: New director of ISP

Jorrit Leenaarts is the new director of the Institute for Solar Physics.

12 December 2017: Three new postdoc positions in solar physics

The Institute for Solar Physics of the Department of Astronomy announces three postdoc positions for the following projects:

  1. Studying the cause of large fibrillar density variations in the solar chromosphere using tracer particles.
  2. Understanding magnetic-field-regulated heating in heating and explosive events in the solar chromosphere.
  3. Fundamental magnetic processes in the solar chromosphere.

Closing date: 31 January 2018.

1 December 2017: New PhD position in solar physics

We announce a PhD position to study the physics of active region and flares in the solar chromosphere. This project involves modelling of very high resolution spectropolarimetric observations acquired with the CRISP and CHROMIS instruments at the Swedish 1-m Solar Telescope (SST) and with NASA's IRIS satellite. The selected candidate will compute and analyze empirical 3D models from these observations using data inversion techniques.

Closing date: 15 January 2018.

6 September 2017: ERC grant for SUNMAG project

Jaime de la Cruz Rodriguez has been awarded the prestigious European Research Council Starting Grant (€1.5 million) for the project "SUNMAG: Understanding magnetic field regulated heating and explosive events in the solar chromosphere".

27 June 2017: Shining a light on solar flares

This paper resolves the puzzle of large red shifts of hydrogen Hα line emission in flares by proving that short (10s) injections of super-energetic electron beams, or solar energetic particles (SEPs) can be responsible for a hydrogen emission from the flaring chromosphere as well as for the extra Ultra-Violet emission (EUV) from the flaring corona.

The research relied upon AIA/SDO and the Swedish 1-meter Solar Telescope. It was published by PhD student Malcolm Druett (Northumbria University, Newcastle upon Tyne, UK) et al. in Nature Communications.

22 June 2017: Neutral particles are key to formation of spicules

At any given moment, as many as 10 million spicules - wild jets of solar material - burst from the sun's surface. They erupt as fast as 100 km/s, and can reach lengths of 10 000 km before collapsing. Scientists from the Bay Area Environmental Research (BAER) Institute, the Lockheed-Martin Solar and Astrophysics Laboratory (LMSAL), and the Institute of Theoretical Astrophysics of Oslo University have revealed their origin.

A computer simulation shows how spicules form, helping scientists understand how spicules can break free of the sun's surface and surge upward so quickly. Neutral particles provide the buoyancy the gnarled knots of magnetic energy need to rise through the sun's boiling plasma and reach the chromosphere. There, they snap into spicules, releasing both plasma and energy. Friction between ions and neutral particles heats the plasma even more, both in and around the spicules.

This work relied upon high-cadence observations from NASA's Interface Region Imaging Spectrograph (IRIS) and the Swedish 1-meter Solar Telescope. It was published by Dr. J. Martínez-Sykora (BAER and LMSAL, USA) et al. in Science. See also NASA's press release.

See also the Past Highlights
Time-stamp: <2018-10-09 13:39:55 mats>