Sulfur-bearing species in molecular clouds (CROSBI ID 210353)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bilalbegović, Goranka ; Baranović, Goran
engleski
Sulfur-bearing species in molecular clouds
We study several molecules that could help in the solution of the missing sulfur problem in dense clouds and circumstellar regions, as well as in the clarification of the sulfur chemistry in comets. These sulfur molecules are: the trimer (CH2S)3 and the tetramer (CH2S)4 of thioformaldehyde, pentathian S5CH2, hexathiepan S6CH2, thiirane C2H4S, trisulfane HSSSH, and thioacetone (CH3)2CS. Infrared spectra of these species are calculated using density functional theory methods. The majority of calculated bands belong to the mid-infrared, with some of them occurring in the near and far-infrared region. We suggest that some of unidentified spectral features measured by Infrared Space Observatory in several active galactic nuclei and starburst galaxies could be caused by 1, 3, 5-trithiane ((CH2S)3), 1, 3, 5, 7-tetrathiocane ((CH2S)4), and thiirane (C2H4S). The objects whose unidentified infrared features we compare with calculated bands are: NGC 253, M82, NGC 1068, Circinus, Arp 220, 30 Doradus, Orion KL, and Sgr B2.
astrophysical molecules; infrared spectra; interstellar medium; galaxies; density functional theory
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Podaci o izdanju
446 (3)
2015.
3118-3129
objavljeno
0035-8711
10.1093/mnras/stu2313