Panel a: evolution of the FLMF according to the improved version of our model where filaments accrete in the same way as in Fig. C.2, but subcritical filaments with M_line <  4 M_⊙ pc⁻¹ decay on a timescale at the same time. The black solid line shows the initial power-law FLMF (dN/dlog ) determined by interstellar turbulence. The green, red, and blue solid curves show the model FLMF at three time steps, , , after the accretion process is “switched on” at , where roughly corresponds to ∼0.5–1 Myr. The vertical red and blue lines are the same as in Fig. C.2. The green, red, and blue dashed curves show the same model FLMF taking estimated incompleteness effects into account in the subcritical line mass regime. Panel b: comparison of the model FLMF including incompleteness effects at (dashed red curve) with the observed FLMF from Fig. 1a (blue histogram).