A shock-wave heating model for chondrule formation: Effects of evaporation and gas flows on silicate particles

被引：33

作者：

Miura, H ^{[1
]}

Nakamoto, T

Susa, H

机构：

[1] Univ Tsukuba, Tsukuba, Ibaraki 3058571, Japan

[2] Univ Tsukuba, Ctr Computat Phys, Tsukuba, Ibaraki 3058577, Japan

[3] Rikkyo Univ, Coll Sci, Dept Phys, Toshima Ku, Tokyo 1718501, Japan

来源：

ICARUS | 2002年 / 160卷 / 02期

基金：

日本学术振兴会;

关键词：

meteorites; origin; Solar System; thermal histories;

D O I：

10.1006/icar.2002.6964

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A shock-wave heating model is one of the possible models for chondrule formation. We examine, within the framework of a shock-wave heating model, the effects of evaporation on the heating of chondrule precursor particles and the stability of their molten state in the postshock flow. We numerically simulate the heating process in the flow taking into account evaporation. We find that the melting criterion and the minimum radius criterion do not change significantly. However, if the latent heat cooling due to the evaporation dominates the radiative cooling from the precursor particle, the peak temperature of the precursor particle is suppressed by a few hundred Kelvins. We also find that the total gas pressure (ram plus static) acting on the precursor particle exceeds the vapor pressure of the molten precursor particle. Therefore, it is possible to form chondrules in the shock-wave heating model if the precursor temperature increases up to the melting point. (C) 2002 Elsevier Science (USA).

引用

页码：258 / 270

页数：13

共 24 条

[21] On the maximal size of chondrules in shock wave heating model [J].