IAUS379: Dynamical Masses of Local Group Galaxies

The wide-field spectrographs 4MOST and MOONS will enter operations in 2024 at the ESO Paranal Observatory. These upcoming survey facilities will play an important role in various fields over the next decade. In particular, both will host surveys aimed at observing nearby Local Group galaxies. Here, we provide an overview of all the planned 4MOST and MOONS surveys that focus on Local Group galaxy kinematics. We will describe how their scientific performances complement Gaia and other spectroscopic surveys in the field of nearby galaxy kinematics. In addition, we will outline the outstanding scientific questions regarding the local group galaxy masses and dynamics, in which the MOONS and 4MOST survey science will allow major progress. Finally, we will describe how the community can access observing time and data, to participate in solving fundamental issues in this field.