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

被引:81
作者
WILLACY, K
WILLIAMS, DA
机构
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.
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页码:635 / 642
页数:8
相关论文
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