H_{2}S Formation in Dark Clouds
RONCERO, O.
Consejo Superior de Investigaciones Cientificas = Spanish National Research Council [CSIC]
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Consejo Superior de Investigaciones Cientificas = Spanish National Research Council [CSIC]
Language
en
Communication dans un congrès
This item was published in
2018-07-16, Salamanque.
English Abstract
Sulfur is of fundamental importance in a wide variety of phenomena such as life on Earth. This element is one of the most abundant elements in space S/H ˜ 1.3×10^{-5}, but sulfuratted molecules are not as abundant as ...Read more >
Sulfur is of fundamental importance in a wide variety of phenomena such as life on Earth. This element is one of the most abundant elements in space S/H ˜ 1.3×10^{-5}, but sulfuratted molecules are not as abundant as expected, thus a better understanding of sulfur chemistry is needed. We study and model the abundance of H_{2}S in two prototypical dark clouds, TMC1 and Barnard 1, to shed light on the physical and chemical processes involved in H_{2}S creation and destruction. Our observations are consistent with a PDR model in which H_{2}S is formed in grain mantles and released to gas phase via photodesorption. We cannot discard the contribution of other desorption processes, such as chemical desorption and/or grain-grain collisions, to enhance the H_2S abundance.Read less <
Origin
Hal imported