and associated phenomena to be enabled by a mission with microcalorimeter energy
resolution in the soft X-ray band, a large collecting area, and wide-field imaging. Such a
mission, the Line Emission Mapper (LEM), has been proposed to NASA's 2023 Astrophysics
Probe Explorer call. While the science pillars of the PI-led part of the mission focus on galaxy
evolution, the PI-led LEM All-Sky Survey (LASS) and General Observer/Investigator …