I would like to calculate the inflow and outflow rates of galaxies in the TNG300-1 simulation. In this context, what choice of radius is typically adopted for measuring these rates? Should the radius be fixed for all galaxies, or should it vary with galaxy mass (for example, scaled to the virial radius)? I would appreciate guidance on which approach is more appropriate and why.
I would like to calculate the inflow and outflow rates of galaxies in the TNG300-1 simulation. In this context, what choice of radius is typically adopted for measuring these rates? Should the radius be fixed for all galaxies, or should it vary with galaxy mass (for example, scaled to the virial radius)? I would appreciate guidance on which approach is more appropriate and why.