This ISSI team will address the overarching science question:
What are the sources of the solar wind and what processes lead to its generation and acceleration?
The recent launch of Parker Solar Probe has initiated a new era of observing the heliosphere very close to the Sun. During PSP’s first perihelion, the solar disk was observed extensively by space-based missions such as Hinode as well as by ground-based telescopes, such as those operated by the NSO. Similar observations are planned for subsequent PSP encounters and are also planned for the Solar Orbiter mission. Weaving remote sensing observations of source regions and in situ plasma measurements together into a coherent picture of the solar wind will require intensive collaboration between the fields of space plasma physics, solar physics, and the various modelling communities. The proposed ISSI team will bring experts in these areas together for the collaboration needed to make progress on exploiting this collaboration to tackle the overarching science question of this project.