Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 469, Issue 1, Pages 435-447Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx828
Keywords
astrochemistry; methods: numerical; stars: formation; ISM: abundances; ISM: clouds; ISM: molecules
Categories
Funding
- European Research Council [336474]
- CNRS
Ask authors/readers for more resources
Sulphur-bearing species are often used to probe the physical structure of star-forming regions of the interstellar medium, but the chemistry of sulphur in these regions is still poorly understood. In dark clouds, sulphur is supposed to be depleted under a form that is still unknown despite numerous observations and chemical modelling studies that have been performed. In order to improve the modelling of sulphur chemistry, we propose an enhancement of the sulphur chemical network using experimental and theoretical literature. We test the effect of the updated network on the outputs of a three-phases gas-grain chemical model for dark cloud conditions using different elemental sulphur abundances. More particularly, we focus our study on the main sulphur reservoirs as well as on the agreement between model predictions and the abundances observed in the dark cloud TMC-1 (CP). Our results show that depending on the age of the observed cloud, the reservoir of sulphur could either be atomic sulphur in the gas phase or HS and H2S in icy grain bulks. We also report the first chemical model able to reproduce the abundances of observed S-bearing species in TMC-1 (CP) using as elemental abundance of sulphur its cosmic value.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available