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Rotational spectra of isotopic species of methyl cyanide, CH3CN, in their v8 = 1 excited vibrational states | | H. S. P. Müller
; B. J. Drouin
; J. C. Pearson
; M. H. Ordu
; N. Wehres
; F. Lewen
; | | Date: |
16 Dec 2015 | | Abstract: | Methyl cyanide is an important trace molecule in space, especially in
star-forming regions where it is one of the more common molecules used to
derive kinetic temperatures.
We want to obtain accurate spectroscopic parameters of minor isotopologs of
methyl cyanide in their lowest excited v8 = 1 vibrational states to support
astronomical observations, in particular, with interferometers such as ALMA.
The laboratory rotational spectrum of methyl cyanide in natural isotopic
composition has been recorded from the millimeter to the terahertz regions.
Transitions with good signal-to-noise ratios could be identified for the
three isotopic species CH3(13)CN, (13)CH3CN, and CH3C(15)N up to about 1.2 THz
(J" <= 66). Accurate spectroscopic parameters were obtained for all three
species.
The present data were already instrumental in identifying v8 = 1 lines of
methyl cyanide with one (13)C in IRAM 30 m and ALMA data toward Sagittarius
B2(N). | | Source: | arXiv, 1512.5271 | | Services: | Forum | Review | PDF | Favorites | |
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