DESORPTION PROCESSES IN MOLECULAR CLOUDS - QUASI-STEADY-STATE CHEMISTRY

被引：81

作者：

WILLACY, K

WILLIAMS, DA

机构：

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1993年 / 260卷 / 03期

关键词：

MOLECULAR PROCESSES; ISM; CLOUDS; COSMIC RAYS; DUST; EXTINCTION; INDIVIDUAL; TMC-1-ISM; MOLECULES;

D O I：

10.1093/mnras/260.3.635

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The effects of mantle desorption due to cosmic rays on the chemistry of interstellar clouds are modelled. Two desorption mechanisms are considered - direct cosmic ray heating of dust grains and cosmic ray induced photodesorption. Their effects at densities typical of a molecular cloud and a dense core are investigated. It is found that both mechanisms have a significant effect on the gas-phase molecular abundances. The results for the molecular cloud case are compared with observations of TMC-1 and found to be in reasonable agreement.

引用

页码：635 / 642

页数：8

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[1] TEMPERATURE-FLUCTUATIONS AND THE SIZE DISTRIBUTION OF INTER-STELLAR GRAINS [J].