Astrophysikalisches Kolloquium

Das Institut für Physik - Fachbereich Astrophysik und Geophysik - lädt zu folgendem Vortrag im Rahmen des Astrophysikalischen Kolloquiums ein:

"Beyond the Earth-Sun Line: Multi-Viewpoint Synoptic Magnetic Maps SO/PHI and SDO/HMI"
Dr. Philipp Löschl
Max Planck Institute for Solar System Research
Göttingen, Germany

Standard synoptic maps of the solar photospheric magnetic field are assembled over a full 27-day solar rotation from a single Earth-side viewpoint, meaning farside observations are always up to two weeks old and any newly emerged flux goes entirely unseen. These limitations introduce significant uncertainties into the coronal and heliospheric models that underpin space weather forecasting.

As the only magnetograph currently capable of directly observing the solar farside, SO/PHI on Solar Orbiter offers a unique path to systematic global coverage. Combined with SDO/HMI, the two instruments can produce global magnetic field maps in as little as two weeks under favourable orbital geometries. In this talk, we present this combined synoptic map data product, demonstrate the compatibility between the two instruments, and quantify how farside coverage alters the coronal hole boundaries, open flux, and field topology that drive coronal and heliospheric space weather models.

Time: Tuesday June 9, 2026 at 14:00 CEST
Library Experimental Physics
Universitätsplatz 5, 8010 Graz

Einladung