H_{2}S Formation in Dark Clouds
- Author(s)
- D. G. Navarro, A. Fuente, P. Caselli, M. Gerin, C. Krammer, E. Rouef, V. Wakelam, T. Alonso-Albi, R. Bachiller, S. Cazaux, B. Commerçon, R. Friesen, S. García-Burillo, B. M. Giuliano, J. R. Goicoechea, P. Gratier, A. Hacar, I. Jiménez-Serra, J. Kirk, V. Lattanzi, J. C. Loison, P. J. Malinen, N. Marcelino, R. Martín-Doménech, G. Muñoz-Caro, J. Pineda, M. Tafalla, B. Tercero, D. Ward-Thompson, S. Treviño-Morales, P. Riviére-Marichalar, O. Roncero
- 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 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.
- Organisation(s)
- Department of Education, Department of Astrophysics
- External organisation(s)
- Observatorio Astronómico Nacional (OAN-IGN), Max-Planck-Institut für extraterrestrische Physik, Université de recherche Paris Sciences et Lettres, Instituto de Radioastronomía Milimétrica (IRAM), Université Bordeaux, Delft University of Technology, Leiden University, Université de Lyon, University of Toronto, Spanish National Research Council (CSIC), University of Warwick, University of Helsinki, Rheinische Friedrich-Wilhelms-Universität Bonn, Harvard-Smithsonian Center for Astrophysics, University of Central Lancashire
- Pages
- 366-373
- Publication date
- 2019
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103004 Astrophysics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/36434316-6364-4ae9-a479-366e0aa46ed1