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J/A+A/609/A24       Rotational spectrum of methoxyamine     (Kolesnikova+, 2018)

Rotational spectrum of methoxyamine up to 480 GHz: a laboratory study and astronomical search. Kolesnikova L., Tercero B., Alonso E.R., Guillemin J.-C., Cernicharo J., Alonso J.L. <Astron. Astrophys. 609, A24 (2018)> =2018A&A...609A..24K (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Spectroscopy Keywords: astrochemistry - ISM: molecules - line: identification - astronomical databases: miscellaneous - Abstract: Methoxyamine is a potential interstellar amine that has been predicted by gas-grain chemical models for the formation of complex molecules. The aim of this work is to provide direct experimental frequencies of its ground-vibrational state in the millimeter and submillimeter-wave regions to achieve its detection in the interstellar medium. Methoxyamine was chemically liberated from its hydrochloride salt, and its rotational spectrum was recorded at room temperature from 75 to 480GHz using the millimeter-wave spectrometer in Valladolid. Many observed transitions revealed A-E splitting caused by the internal rotation of the methyl group, which had to be treated with specific internal rotation codes. Over 400 lines were newly assigned for the most stable conformer of methoxyamine, and a precise set of spectroscopic constants was obtained. Spectral features of methoxyamine were then searched for in the Orion KL, Sgr B2, B1-b, and TMC-1 molecular clouds. Upper limits to the column density of methoxyamine were derived. Description: Observed rotational transitions of methoxyamine in the ground torsional state. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 76 661 Observed rotational transitions of methoxyamine in the ground torsional state
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1 I1 --- Sigma Symmetry number (1) 4- 6 I3 --- J' Upper state J quantum number 7- 9 I3 --- Ka' Upper state Ka quantum number 10- 12 I3 --- Kc' Upper state Kc quantum number 15- 17 I3 --- J" Lower state J quantum number 18- 20 I3 --- Ka" Lower state Ka quantum number 21- 23 I3 --- Kc" Lower state Kc quantum number 32- 41 F10.3 MHz FreqObs Observed transition frequency (2) 48- 53 F6.3 MHz O-C Observed minus calculated frequency (3) 58- 64 F7.4 MHz Sa Line strength for a-type transitions 70- 76 F7.4 MHz Sb Line strength for b-type transitions
Note (1): The symmetry numbers sigma = 0 and 1 label the A and E transitions, respectively. Note (2): In case of the lines that are composed from degenerate asymmetric rotor transitions, equal weights were assigned to the components of these blends. Any other transitions that are accidentally blended, such as those corresponding to the unrelated A and E components, were not included in the fit. Note (3): In case of the blended transitions, this value corresponds to the difference between the observed and calculated central frequency.
Acknowledgements: Lucie Kolesnikova, lucie.kolesnikova(at)uva.es
(End) Lucie Kolesnikova [GEM, UVa, Spain], Patricia Vannier [CDS] 23-Oct-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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