J/A+A/592/A43 Millimeter wave spectra of carbonyl cyanide (Bteich+, 2016)
Millimeter wave spectra of carbonyl cyanide.
Bteich S.B., Tercero B., Cernicharo J., Motiyenko R.A., Margules L.,
Guillemin J.-C.
<Astron. Astrophys. 592, A43 (2016)>
=2016A&A...592A..43B 2016A&A...592A..43B (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics ; Spectroscopy
Keywords: ISM: molecules - ISM: abundances - submillimeter: ISM -
molecular data - methods: laboratory: molecular - line: identification
Abstract:
More than 30 cyanide derivatives of simple organic molecules have been
detected in the interstellar medium, but only one dicarbonitrile has
been found and that very recently. There is still a lack of
high-resolution spectroscopic data particularly for dinitriles
derivatives. The carbonyl cyanide molecule is a new and interesting
candidate for astrophysical detection. It could be formed by the
reaction of CO and CN radicals, or by substitution of the hydrogen
atom by a cyano group in cyanoformaldehyde, HC(=O)CN, that has already
been detected in the interstellar medium.
The available data on the rotational spectrum of carbonyl cyanide is
limited in terms of quantum number values and frequency range, and
does not allow accurate extrapolation of the spectrum into the
millimeter-wave range. To provide a firm basis for astrophysical
detection of carbonyl cyanide we studied its millimeter-wave spectrum.
Methods. The rotational spectrum of carbonyl cyanide was measured in
the frequency range 152-308GHz and analyzed using Watson's A- and
S-reduction Hamiltonians.
The ground and first excited state of v5 vibrational mode were
assigned and analyzed. More than 1100 distinct frequency lines of the
ground state were fitted to produce an accurate set of rotational and
centrifugal distortion constants up to the eighth order. The frequency
predictions based on these constants should be accurate enough for
astrophysical searches in the frequency range up to 500GHz and for
transition involving energy levels with J<100 and Ka<42. Based on the
results we searched for interstellar carbonyl cyanide in available
observational data without success. Thus, we derived upper limits to
its column density in different sources.
Description:
Table 3 contains assigned rotational transitions of the ground state
and the first excited vibrational state (v5=1) of carbonyl cyanide.
Table 4 contains predicted transitions of the ground vibrational state
of carbonyl cyanide in the frequency range up to 1THz.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 74 3210 Assigned rotational transitions of the ground and
v5=1 excited vibrational states of carbonyl
cyanide
table4.dat 64 18649 Predicted rotational transitions of the ground
vibrational state of carbonyl cyanide up to 1THz
--------------------------------------------------------------------------------
See also:
J/A+A/493/565 : Deuterated and 15N ethyl cyanides (Margules+, 2009)
J/A+A/538/A51 : Rotational spectrum of CH3CH(NH2)CN (Mollendal+, 2012)
J/A+A/538/A119 : Spectrum of 18O-methyl formate HCO18OCH3 (Tercero+ 2012)
J/A+A/540/A51 : Submm spectrum of deuterated glycolaldehydes (Bouchez+, 2012)
J/A+A/543/A46 : Submillimeter spectrum of HCOOCD2H (Coudert+, 2012)
J/A+A/543/A135 : New analysis of 13C-CH3CH2CN up to 1THz (Richard+, 2012
J/A+A/544/A82 : Rotational spectroscopy of diisocyanomethane (Motiyenko+, 2012
J/A+A/548/A71 : Spectroscopy and ISM detection of formamide (Motiyenko+, 2012)
J/A+A/549/A96 : The mm & sub-mm spectra of 13C-glycolaldehydes (Haykal+, 2013)
J/A+A/549/A128 : Singly deuterated isotopologues of formamide (Kutsenko+, 2013
J/A+A/552/A117 : Mono-deuterated dimethyl ether (Richard+, 2013)
J/A+A/553/A84 : (Sub)mm spectrum of deuterated methyl cyanides (Nguyen+, 2013)
J/A+A/559/A44 : Rotational spectrum of MAAN (CH2NCH2CN) (Motiyenko+, 2013)
J/ApJ/779/119 : HCOOCH2D detection in Orion KL (Coudert+, 2013)
J/A+A/563/A137 : THz spectrum of methylamine (Motiyenko+, 2014)
J/A+A/568/A58 : HCOO13CH3 rotational spectrum (Haykal+, 2014)
J/A+A/579/A46 : Mono-13C acetaldehyde mm/submm wave spectra (Margules+ 2015)
J/A+A/587/A152 : Rotational spectrum of 13C methylamine (Motiyenko+, 2016)
J/A+A/590/A93 : Doubly 13C-substituted ethyl cyanide (Margules+, 2016)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- S State identifier
7- 8 I2 --- J' Upper J quantum number
11- 12 I2 --- Ka' Upper Ka quantum number
15- 16 I2 --- Kc' Upper Kc quantum number
19- 20 I2 --- J" Lower J quantum number
23- 24 I2 --- Ka" Lower Ka quantum number
27- 28 I2 --- Kc" Lower Kc quantum number
34- 44 F11.4 MHz Freq Observed transition frequency
49- 55 F7.4 MHz O-C Residuals of the fit
59- 64 F6.4 MHz unc Uncertainty of measurements
68- 74 E7.2 --- RelI ? Relative intensity for blended line components
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 3 I2 --- J' Upper J quantum number
5- 6 I2 --- Ka' Upper Ka quantum number
8- 9 I2 --- Kc' Upper Kc quantum number
11- 12 I2 --- J" Lower J quantum number
14- 15 I2 --- Ka" Lower Ka quantum number
17- 18 I2 --- Kc" Lower Kc quantum number
21- 31 F11.4 MHz Freq Predicted transition frequency
35- 40 F6.4 MHz Unc Uncertainty of predicted transition frequency
43- 52 E10.4 D+2 Smu2 Product mu^2*S
55 I1 --- Wst Nuclear spin statistical weight
57- 64 F8.3 cm-1 Elo The energy of the lower state
--------------------------------------------------------------------------------
Acknowledgements:
Roman Motiyenko, roman.motienko(at)univ-lille1.fr
(End) Roman Motiyenko [PhLAM, Lille 1], Patricia Vannier [CDS] 31-May-2016