Abstract: The Sun is a prototypical late-type planet-hosting star and the only central star of a planetary system known to host life.
The magnetic field of the Sun relieves our star from the monotony of an unchanging, or at least extremely gradually evolving existence. Instead the Sun’s complex magnetic fields leads our star to display a large variety of ever-changing features, such as sunspots and faculae at the solar surface, a bright network in the chromosphere, and loops and plumes in the corona, among others. It also leads to variations of the total brightness of the Sun. From time to time, the incessantly evolving magnetic field also causes greater outbursts of radiation, in the form of flares, or of particles in the form of coronal mass ejections. All these How the solar magnetic field is structured, how it produces aspects of solar activity and variability and how we learn more about it and its influence, including with the Solar Orbiter mission, will be subjects of this talk.
Bio: Dr. Sami Solanki is the director of the Max Planck Institute for Solar System Research (MPS) in Göttingen, Germany. He got his PhD in 1987 at the ETH Zurich and moved to Gottingen in 1999. His main research interests are solar and heliospheric physics, in particular the investigation of solar magnetism and Sun-Earth relations; stellar astrophysics; Astronomical tests of theories of gravitation; Atomic and molecular physics of astrophysical interest. Dr. Solanki has made many seminal contributions to the study of solar magnetism and its impact on the solar–terrestrial relationship over his career. His visionary and outstanding leadership and innovative instrument development have made him one of the most influential scientists in the field of solar and heliospheric physics over the world. Dr. Solanki’s ground-breaking research has advanced understanding of the physical mechanisms that govern the structure and evolution of magnetic fields on the Sun and other stars and established reconstruction of the solar irradiance variability on timescales of days to millennia. In addition, Dr. Solanki led the balloon-borne Sunrise mission and the PHI instrument on Solar Orbiter mission that is currently in flight. He has also mentored generations of solar and space scientists into successful careers.
No recorded video on request of the speaker.