Hydrated sulphuric acid in dense molecular clouds |
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| Authors: | Flavio Scappini Cesare Cecchi-Pestellini Harvey Smith William Klemperer Alexander Dalgarno |
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| Institution: | Istituto per lo Studio dei Materiali Nanostrutturati del CNR, Via P. Gobetti 101, 40129 Bologna, Italy;Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA;Department of Chemistry, Harvard University, 12 Oxford Street, Cambridge, MA 02138, USA |
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| Abstract: | We consider sulphur depletion in dense molecular clouds, and suggest hydrated sulphuric acid, H2SO4 · n H2O, as a component of interstellar dust in icy mantles. We discuss the formation of hydrated sulphuric acid in collapsing clouds and its instability in heated regions in terms of the existing hot core models and observations. We also show that some features of the infrared spectrum of hydrated sulphuric acid have correspondence in the observed spectra of young stellar objects. |
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| Keywords: | ISM: clouds dust extinction ISM: lines and bands ISM: molecules infrared: ISM |
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