J/ApJS/229/26 Rotational spectra of aminoacetonitrile (Kolesnikova+, 2017)
Rotational spectra in 29 vibrationally excited states of interstellar
aminoacetonitrile.
Kolesnikova L., Alonso E.R., Mata S., Alonso J.L.
<Astrophys. J. Suppl. Ser., 229, 26-26 (2017)>
=2017ApJS..229...26K 2017ApJS..229...26K (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics ; Spectra, millimetric/submm
Keywords: catalogs; ISM: molecules; molecular data; techniques: spectroscopic
Abstract:
We report a detailed spectroscopic investigation of the interstellar
aminoacetonitrile, a possible precursor molecule of glycine. Using a
combination of Stark and frequency-modulation microwave and millimeter
wave spectroscopies, we observed and analyzed the room-temperature
rotational spectra of 29 excited states with energies up to
1000cm-1. We also observed the 13C isotopologues in the ground
vibrational state in natural abundance (1.1%). The extensive data set
of more than 2000 new rotational transitions will support further
identifications of aminoacetonitrile in the interstellar medium.
Description:
In the present work, new spectroscopic measurements and analysis of
aminoacetonitrile have been performed in frequency ranges 26-40GHz,
75-115GHz, and 170-240GHz. Stark-modulation microwave and
frequency-modulation millimeter wave spectroscopies made it possible
to identify the pure rotational transitions of 29 different excited
vibrational states belonging to fundamentals, overtones, and
combination states of the low-frequency torsional and bending modes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 67 2352 List of the assigned and fitted transitions for
29 excited vibrational states of the parent species
and ground state transitions of two 13C
isotopologues of aminoacetonitrile (NH2-CH2-CN)
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See also:
J/ApJS/209/23 : Aminoacetonitrile transition frequencies (Motoki+, 2013)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Species Species
17- 18 I2 --- J1 [7/40] Upper J quantum number
20- 21 I2 --- Ka1 [0/16] Upper Ka quantum number
23- 24 I2 --- Kc1 [3/38] Upper Kc quantum number
28- 29 I2 --- J0 [6/40] Lower J quantum number
31- 32 I2 --- Ka0 [0/16] Lower Ka quantum number
34- 35 I2 --- Kc0 [2/39] Lower Kc quantum number
39- 49 F11.4 MHz nuObs [75024/239803.2] Observed frequency of the
transition
53- 57 F5.3 MHz e_nuObs [0.05/0.5] Uncertainty of the observed frequency
62- 67 F6.3 MHz O-C [-0.3/0.3] Observed minus calculated frequency
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 14-Jun-2017