J/A+A/642/A206 Propynethial (HCCCHS) submm spectroscopy (Margules+, 2020)
Submillimeterwave spectroscopy and the radio-astronomical investigation of
propynethial (HCCCHS).
Margules L., McGuirre B.A., Evans C.J., Motiyenko R.A., Remijan A.,
Guillemin J.C., Wong A., McNaughton D.
<Astron. Astrophys. 642, A206 (2020)>
=2020A&A...642A.206M 2020A&A...642A.206M (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Molecular clouds ; Radio lines ;
Spectroscopy
Keywords: ISM: molecules - methods: laboratory: molecular - submillimeter: ISM -
molecular data - line: identification
Abstract:
The majority of sulfur-containing molecules detected in the
interstellar medium (ISM) are analogs of oxygen-containing compounds.
Propynal was detected in the ISM in 1988, hence propynethial, its
sulfur derivative, is a good target for an ISM search.
Our aim is to measure the rotational spectrum of propynethial and use
those measurements to search for this species in the ISM. To date,
measurements of the rotational spectra of propynethial have been
limited to a small number or transitions below 52GHz. The
extrapolation of the prediction to lines in the milimeter-wave domain
is inaccurate and does not provide data to permit an unambiguous
detection.
The rotational spectrum was re-investigated up to 630GHz. Using the
new prediction lines of propynethial, as well as the related propynal,
a variety of astronomical sources were searched, including
star-forming regions and dark clouds.
A total of 3288 transitions were newly assigned and fit together with
those from previous studies, reaching quantum numbers up to J=107
and Ka=24. Watson's symmetric top Hamiltonian in the Ir
representation was used for the analysis, because the molecule is very
close to the prolate limit. The search for propynethial resulted in a
non-detection; upper limits to the column density were derived in each
source.
Description:
Measured frequencies, and residuals from the global fit of the data
for propynethial and files used for SPFIT.
Detailled explanations on SPFIT could be found at
https://cdms.astro.uni-koeln.de/classic/general
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
s1.dat 76 4590 Measured frequencies and residuals from the
global fit of the data for propynethial
s2.lin 59 4590 .lin file, input file for SPFIT
s3.par 77 28 .par file, input file for SPFIT
s4.cat 73 13738 .cat prediction up to 700GHz
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See also:
J/A+A/493/565 : Deuterated and 15N ethyl cyanides (Margules+, 2009)
J/A+A/500/1109 : Rotational spectrum of HCOO13CH3 (Carvajal+, 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 : mm and sub-mm spectra of 13C-glycolaldehydes (Haykal+, 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/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 : Mono13C acetaldehydes mm/submm wave spectra (Margules+ 2015)
J/A+A/591/A110 : 15NH2 amidogen radical rotational spectrum
(Margules+, 2016)
J/A+A/601/A50 : Sub-millimeter spectra of 2-hydroxyacetonitrile
(Margules+, 2017)
J/A+A/610/A44 : Ethyl isocyanide submillimeter wave spectroscopy
(Margules+, 2018)
J/A+A/619/A92 : Laboratory analysis of methylketene (Bermuez+, 2018)
J/A+A/623/A162 : Spectroscopy of CH2(CN)2 and CNCH2CN (Motiyenko+, 2019)
J/A+A/624/A70 : Acetaldehyde CH2DCOH and CH3COD (Coudert+, 2019)
J/A+A/638/A3 : Cyanoketene (NC-CH=C=O) mm wave spectroscopy (Margules+, 2020)
Byte-by-byte Description of file: s1.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- Nr Line number
6 A1 --- --- [:]
8- 10 I3 --- J" Upper J quantum number
12- 13 I2 --- Ka" Upper Ka quantum number
14- 16 I3 --- Kc" Upper Kc quantum number
17- 19 I3 --- J' Lower J quantum number
21- 22 I2 --- Ka' Lower Ka quantum number
23- 25 I3 --- Kc' Lower Kc quantum number
46- 56 F11.4 MHz Freq Observed transition frequency
60- 66 F7.4 MHz O-C Observed - Calculated frequencies
69- 76 F8.4 MHz unc Experimental uncertainty
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Description of file:
File s2.lin (measured transition):
-------------------------------------------------------------------------------
Bytes Format Units Label Explanations
-------------------------------------------------------------------------------
1- 3 I3 --- J" Upper J quantum number
5- 6 I2 --- Ka" Upper Ka quantum number
7- 9 I3 --- Kc" Upper Kc quantum number
10- 12 I3 --- J' Lower J quantum number
14- 15 I2 --- Ka' Lower Ka quantum number
16- 18 I3 --- Kc' Lower Kc quantum number
40- 49 F10.3 --- Freq Observed transition frequency
53- 59 F7.3 --- unc Uncertainty of measurements
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File s3.par (spectroscopic parameters):
First 3 lines for SFIPT use (see https://www.astro.uni-koeln.de/cdms/pickett)
For lines 4 to 26:
------------------------------------------------------------------------------
Bytes Format Units Label Explanations
------------------------------------------------------------------------------
9- 13 I5 --- IDPAR Coding of the parameter
16- 37 E22.15 --- PAR Parameter value
39- 53 E14.8 --- ERPAR Parameter uncertainty
55- 59 A11 --- LABEL Parameter label that is delimited by /
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File s4.cat (spectrum prevision):
-------------------------------------------------------------------------------
Bytes Format Units Label Explanations
-------------------------------------------------------------------------------
3- 13 F11.4 MHz Freq Frequency of the line
16- 21 F6.4 MHz e_Freq Estimated or experimental error
23- 29 F7.4 [nm2.MHz] logInt Base 10 logarithm of the integrated intensity
in units of nm2.MHz
31 I1 --- DOF Degrees of freedom in the rotational
partition function
33- 41 F9.4 --- Elow Lower state energy in wavenumbers
42- 44 I3 --- gup Upper state degeneracy
47- 51 I5 --- Tag Species tag or molecular identifier
52- 55 I4 --- QNFMT Identifies the format of the quantum numbers
given in the field QN
56- 57 A2 --- J" Upper J quantum number
58- 59 A2 --- Ka" Upper Ka quantum number
60- 61 A2 --- Kc" Upper Kc quantum number
68- 69 A2 --- J' Lower J quantum number
70- 71 I2 --- Ka' Lower Ka quantum number
72- 73 A2 --- Kc' Lower Kc quantum number
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Acknowledgements:
Laurent Margules, laurent.margules(at)univ-lille.fr
(End) Laurent Margules [Phlam, France], Patricia Vannier [CDS] 07-Oct-2020