A systematic mid-infrared spectroscopic study of thermally processed H 2 S ices.

Autor: Mifsud DV; Centre for Astrophysics and Planetary Science, School of Physics and Astronomy, University of Kent, Canterbury CT2 7NH, United Kingdom; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary., Herczku P; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary., Ramachandran R; Atomic, Molecular, and Optical Physics Division, Physical Research Laboratory, Ahmedabad 380009, India., Sundararajan P; Atomic, Molecular, and Optical Physics Division, Physical Research Laboratory, Ahmedabad 380009, India., Rahul KK; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary., Kovács STS; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary., Sulik B; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary., Juhász Z; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary., Rácz R; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary., Biri S; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary., Kaňuchová Z; Astronomical Institute, Slovak Academy of Sciences, Tatranská Lomnica SK-059 60, Slovakia., Ioppolo S; Centre for Interstellar Catalysis, Department of Physics and Astronomy, Aarhus University, Aarhus DK-8000, Denmark., Sivaraman B; Atomic, Molecular, and Optical Physics Division, Physical Research Laboratory, Ahmedabad 380009, India., McCullough RW; Department of Physics and Astronomy, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom., Mason NJ; Centre for Astrophysics and Planetary Science, School of Physics and Astronomy, University of Kent, Canterbury CT2 7NH, United Kingdom; HUN-REN Institute for Nuclear Research (Atomki), Debrecen H-4026, Hungary. Electronic address: n.j.mason@kent.ac.uk.
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2024 Oct 15; Vol. 319, pp. 124567. Date of Electronic Publication: 2024 May 31.
DOI: 10.1016/j.saa.2024.124567
Abstrakt: The positive identification of the molecular components of interstellar icy grain mantles is critically reliant upon the availability of laboratory-generated mid-infrared absorption spectra which can be compared against data acquired by ground- and space-borne telescopes. However, one molecule which remains thus far undetected in interstellar ices is H 2 S, despite its important roles in astrochemical and geophysical processes. Such a lack of a detection is surprising, particularly in light of its relative abundance in cometary ices which are believed to be the most pristine remnants of pre-solar interstellar ices available for study. In this paper, we present the results of an extensive and quantitative mid-infrared spectroscopic characterisation of H 2 S ices deposited at 20, 40, and 70 K and thermally processed to sublimation in an ultrahigh-vacuum system. We anticipate our results to be useful in confirming the detection of interstellar H 2 S ice using high-resolution and high-sensitivity instruments such as the James Webb Space Telescope, as well as in the identification of solid H 2 S in icy environments in the outer Solar System, such as comets and moons.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Author(s). Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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