2009A&A...506.1487M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST23:46:02

2009A&A...506.1487M - Astronomy and Astrophysics, volume 506, 1487-1499 (2009/11-2)

Rotational spectra of isotopic species of methyl cyanide, CH3CN, in their ground vibrational states up to terahertz frequencies.

MUELLER H.S.P., DROUIN B.J. and PEARSON J.C.

Abstract (from CDS):

Methyl cyanide is an important trace molecule in star-forming regions. It is one of the more common molecules used to derive kinetic temperatures in such sources. As preparatory work for Herschel, SOFIA, and in particular ALMA we want to improve the rest frequencies of the main as well as minor isotopologs of methyl cyanide. The laboratory rotational spectrum of methyl cyanide in natural isotopic composition has been recorded up to 1.63THz. Transitions with good signal-to-noise ratio could be identified for CH3CN, 13CH3CN, CH313CN, CH3C15N, CH2DCN, and 13CH313CN in their ground vibrational states up to about 1.2THz. The main isotopic species could be identified even in the highest frequency spectral recordings around 1.6THz. The highest J' quantum numbers included in the fit are 64 for 13CH313CN and 89 for the main isotopic species. Greatly improved spectroscopic parameters have been obtained by fitting the present data together with previously reported transition frequencies. The present data will be helpful to identify isotopologs of methyl cyanide in the higher frequency bands of instruments such as the recently launched Herschel satellite, the upcoming airplane mission SOFIA or the radio telescope array ALMA.

Abstract Copyright:

Journal keyword(s): molecular data - methods: laboratory - techniques: spectroscopic - radio lines: ISM - ISM: molecules

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1359 0
2 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2134 0
3 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1035 1
4 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 916 0
5 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11542 0
6 NAME Sgr B MoC 17 47 02 -28 25.4           ~ 189 0
7 NAME Sgr B2 (North) Rad 17 47 20.2 -28 22 21           ~ 514 1
8 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1909 1

    Equat.    Gal    SGal    Ecl

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2020.07.13-23:46:02

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