Rdust(Tdust)

for blackbody grains, Rdust =

(278 / Tdust)² · (L_Star / L_Sun )^0.5

for graybody grains, Rdust =

(468 / Tdust)^2.5 · (L_Star / L_Sun )^0.5

(<a> / μm )^0.5

for ISM grains, Rdust =

(636 / Tdust)^2.75 · (L_Star / L_Sun )^0.5 · (T_Star / T_Sun )^0.75

<a> = mean grain radius