Whitepaper #419 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: emerging opportunities; solar physics.
In this white paper, we demonstrate the scientific value of interdisciplinary research on high-energy solar/stellar activity. Such interdisciplinary research leverages the combination of spatially-resolved solar measurements with the variety of sources and extreme conditions from stellar observations to provide a more complete picture than either discipline could present on its own.