Particle size as a function of distance to the star. The red, green, and blue lines represent for α_acc = 10⁻², 10⁻³, and 10⁻⁴, respectively (Eq. (B.3)). The Stokes regime is where , while the Epstein regime is where . Four black and gray lines represent particle size whose τ_s = 0.3, 0.1, 0.03, and 0.01 in the Stokesregime and the Epstein regime with α_acc = 10⁻², respectively. Here, Ṁ_g = 10⁻⁸M_⊙ yr⁻¹ and are used.