TY - JOUR
T1 - A systematic mid-infrared spectroscopic study of thermally processed H2S ices
AU - Mifsud, Duncan V
AU - Herczku, Péter
AU - Ramachandran, Ragav
AU - Sundararajan, Pavithraa
AU - Rahul, K K
AU - Kovács, Sándor T S
AU - Sulik, Béla
AU - Juhász, Zoltán
AU - Rácz, Richárd
AU - Biri, Sándor
AU - Kaňuchová, Zuzana
AU - Ioppolo, Sergio
AU - Sivaraman, Bhalamurugan
AU - McCullough, Robert W
AU - Mason, Nigel J
PY - 2024/10/15
Y1 - 2024/10/15
N2 - 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 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 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 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 S in icy environments in the outer Solar System, such as comets and moons.
AB - 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 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 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 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 S in icy environments in the outer Solar System, such as comets and moons.
KW - Sulphur chemistry
KW - H(2)S ice
KW - Infrared spectroscopy
KW - Astrochemistry
KW - Planetary science
U2 - 10.1016/j.saa.2024.124567
DO - 10.1016/j.saa.2024.124567
M3 - Article
C2 - 38843614
SN - 1873-3557
VL - 319
JO - Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
JF - Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
M1 - 124567
ER -