Sublimation temperature Tsub as a function of μHξ−1, where ξ = 1 + 0.02ln(P 0/6.7 ? 1014 dyn cm ). The mean molecular weight μ, the latent heat H, and the vapor pressure in the limit of high temperature, P0, are listed in Table 1. The solid line indicates Eq. (5). Circles represent Tsub obtained from the method of Kobayashi et al. (2009) around the sun.