J/A+A/549/A128 Singly deuterated isotopologues of formamide (Kutsenko+, 2013)
The extended spectroscopic database for deuterated species of formamide up
to 1THz.
Kutsenko A.S., Motiyenko R. A., Margules L., Guillemin J.-C.
<Astron. Astrophys. 549, A128 (2013)>
=2013A&A...549A.128K 2013A&A...549A.128K
ADC_Keywords: Atomic physics
Keywords: ISM: molecules - molecular data - submillimeter: ISM -
line: identification
Abstract:
Formamide (HCONH2) is the simplest molecule with a peptide bond
detected in the interstellar medium. One of the keys for understanding
the mechanisms for forming formamide in massive hot cores is the
comparison of the relative abundances of its deuterated isotopologues.
No deuterated species of formamide have been detected to date mostly
owing to the lack of laboratory spectral data, which is limited by
cm-wave measurements up to 40GHz. Therefore, we decided to extend the
measurements and the analysis of the rotational spectra of deuterated
isotopologues of formamide into terahertz range.
We measured the rotational spectra of deuterated formamide in the
frequency range 150-950GHz using the Lille fast-scan and
solid-state source spectrometers.
The ground vibrational states of 4 different isotopologues of
formamide, DCONH2, cis-HCONHD, trans-HCONHD, and HCOND2 were
assigned and analysed. The sets of the rotational and centrifugal
distortion constants we obtained allow us to calculate accurate
predictions of the transition frequencies for deuterated formamide in
the frequency range above 1THz and at least for J<65 and Ka<25.
Description:
We provide a table with rotational transitions of the three singly
deuterated isotopologues of formamide. The table contains line
assignments, observed frequencies, residuals of the fits using
A-reduction of the Watson's Hamiltonian and accuracy of frequency
measurement. The quantum number F is indicated only for the
transitions with resolved or partially resolved hyperfine structure.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 78 8365 Assigned rotational transitions of the ground
states of the studied singly deuterated
isotopologues of formamide (HCONH2)
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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 : 18O-methyl formate (HCO18OCH3) spectrum (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)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Species Isotopic species of formamide: DCONH2,
c-HCONHD (cis), or t-HCONHD (trans)
11- 12 I2 --- J" Upper J quantum number
14- 15 I2 --- Ka" Upper Ka (rotational) quantum number
17- 18 I2 --- Kc" Upper Kc (rotational) quantum number
20- 21 I2 --- F" Upper F (hyperfine) quantum number
24- 25 I2 --- J' Lower J quantum number
27- 28 I2 --- Ka Lower Ka (rotational) quantum number
30- 31 I2 --- Kc' Lower Kc (rotational) quantum number
33- 34 I2 --- F' Lower F (hyperfine) quantum number
37- 48 F12.4 MHz Freq Observed transition frequency
51- 57 F7.4 MHz O-C Individual residuals of the fit
60- 64 F5.3 MHz unc Measurement uncertainty
67- 73 F7.4 MHz O-Cb ? Residuals of the blended components
75- 78 F4.2 --- Irel ? Relative intensity for blended line components
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Acknowledgements:
Roman Motiyenko, motienko(at)univ-lille1.fr
(End) Roman Motiyenko [PhLAM, Lille 1], Patricia Vannier [CDS] 29-Nov-2012