Shock-wave heating model for chondrule formation: supersaturation ratio of silicate dust vapor

Abstract

Millimeter-sized, spherical silicate grains abundant in chondritic meteorites, which are called as chondrules, are considered to be a strong evidence of the melting event of the dust particles in the protoplanetary disk. One of the most plausible scenarios is that the chondrule precursor dust particles are heated and melt in the high-velocity rarefied gas flow (shock-wave heating model). We considered the evaporation of silicate dust particles in the post-shock region and the thermal evolution of the dust vapor by carrying out the 1-dimensional hydrodynamical simulation of passage of a shock front. We obtained the density and temperature evolutions of the dust vapor. Based on these results, we will discuss the results of our numerical simulation.