Sulfur Chemistry in L1157-B1

Journal
Date Issued
2019
Author(s)
Holdship, Jonathan
•
Jimenez-Serra, Izaskun
•
•
•
•
•
Tafalla, Mario
•
Bachiller, Rafael
•
Ceccarelli, Cecilia
•
DOI
Abstract
The main carrier of sulfur in dense clouds, where it is depleted from the gas phase, remains a mystery. Shock waves in young molecular outflows disrupt the ice mantles and allow us to directly probe the material that is ejected into the gas phase. A comprehensive study of sulfur-bearing species toward L1157-B1, a shocked region along a protostellar outflow, has been carried out as part of the IRAM-30 m large program ASAI. The data set contains over 100 lines of CCS, H2CS, OCS, SO, SO2, and isotopologues. The results of these observations are presented, complementing previous studies of sulfur-bearing species in the region. The column densities and fractional abundances of these species are measured and together these species account for 10% of the cosmic sulfur abundance in the region. The gas properties derived from the observations are also presented, demonstrating that sulfur bearing species trace a wide range of different gas conditions in the region.
Volume
878
Issue
1
Start page
64
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2019ApJ...878...64H
Rights
open.access
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