Fig. 9.
From: The origin of dust in galaxies revisited: the mechanism determining dust content
Time evolution of dust-to-metal mass ratio, δ, for various sets of the parameters of dust growth and destruction (τac,0, ϵmSN). The solid line is the fiducial case with (3 × 106 yr, 1 × 103M⊙). The two dotted lines correspond to the two different sets of (1.5 × 106 yr, 1 × 103M⊙) for the upper and (1.5 × 106 yr, 2 × 103M⊙) for the lower. The two dot-dashed lines correspond to the sets of (3 × 106 yr, 5 × 102M⊙) for the upper and (3 × 106 yr, 2 × 103M⊙) for the lower. The two dashed lines correspond to the sets of (6 × 106 yr, 5 × 102M⊙) for the upper and (6 × 106 yr, 1 × 103M⊙) for the lower. The filled circle with error-bars is an estimate in the Local Interstellar Cloud surrounding the Sun by Kimura et al. (2003). The present age of the Milky Way should be less than the age of the Universe (13.7 Gyr).