Small-Scale Composition Variations and the Origin of the Solar Wind

• Antragsteller: Professor Dr. Robert F. Wimmer-Schweingruber
• Fachliche Zuordnung: Astrophysik und Astronomie
• Förderung: Förderung von 2012 bis 2017
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 219147381

The microscopic solar source regions of the solar wind are still not known. Recent observations with high-resolution remote-sensing instrumentation on Hinode and SDO have revealed remarkable small-scale and often short-time phenomena which are believed to feed into the solar wind. Typical times scales range from hours to days. This is faster than the time scales commonly used for in-situ composition studies in the solar wind. Small-scale or fast variations in the solar wind have only very rarely been studied in the past mainly because of instrumental limitations. We propose to measure such short-term composition fluctuations in the solar wind with SOHO/CELIAS/MTOF and CTOF and ACE/SWICS and relate them to the solar surface to determine the microscopic origin of individual solar wind parcels.

• DFG-Verfahren: Sachbeihilfen