J/A+A/549/A96 The mm and sub-mm spectra of 13C-glycolaldehydes (Haykal+, 2013)
The millimeter and sub-millimeterwave spectra of 13C-glycolaldehydes.
Haykal I., Motiyenko R.A., Margules L., Huet T.R.
<Astron. Astrophys. 549, A96 (2013)>
=2013A&A...549A..96H 2013A&A...549A..96H
ADC_Keywords: Atomic physics
Keywords: ISM: molecules - submillimeter: ISM - methods: laboratory -
line: identification
Abstract:
Glycolaldehyde (CH2OHCHO) is the simplest sugar and an important
intermediate in the path toward forming more complex biologically
relevant molecules. Astronomical surveys of interstellar molecules,
such as those that are being available with the very sensitive ALMA
telescope, require preliminary laboratory investigations of the
microwave and submillimeter-wave spectra of molecular species,
including new isotopologues, to identify these in the interstellar
media.
Description:
To allow the detection of the 13C-isotopologues of glycolaldehyde in
the interstellar medium, their rotational spectra in the millimeter
and submillimeter-wave regions were studied. The spectra of
13CH2OHCHO and CH2OH13CHO were recorded in the 150-945GHz
spectral range in the laboratory using a solid-state
submillimeter-wave spectrometer in Lille. The observed line
frequencies were measured with accuracy, better than 30kHz up to
700GHz and 50kHz above. The analysis was performed using a standard
Watson Hamiltonian. Around 10000 new lines were identified for each
isotopologue. The spectroscopic parameters were determined for the
ground and the three lowest vibrational states, respectively up to 945
and 630GHz. Previous microwave assignments of 13CH2OHCHO were not
confirmed. The provided line-lists and sets of molecular parameters
meet the needs for a first astrophysical search of
13C-glycolaldehydes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 57 9400 Data file of 13CH2OHCHO
table4.dat 57 10522 Data file of CH2OH13CHO
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See also:
J/ApJS/158/188 : Detection of glycolaldehyde toward Sgr B2 (Widicus+, 2005)
Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- v Vibrational level (1)
6- 7 I2 --- J' [1/93] Quantum number (upper state)
9- 10 I2 --- Ka' [0/37] Quantum number (upper state)
12- 13 I2 --- Kc' [0/93] Quantum number (upper state)
15- 16 I2 --- J" [0/92] Quantum number (lower state)
18- 19 I2 --- Ka" [0/36] Quantum number (lower state)
21- 22 I2 --- Kc" [0/92] Quantum number (lower state)
24- 33 F10.3 MHz Freq [13203/945000] Frequency (13-945GHz)
34- 42 F9.5 MHz O-C Residual (observed minus calculated value)
44- 48 F5.3 MHz error Assumed experimental uncertainty
50- 57 E8.3 --- w(I) Intensity weighting for blended lines
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Note (1): levels are "g.s." (ground state), "v1=1", "v2=1" or "v3=1"
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Acknowledgements:
The authors gratefully acknowledge Jean-Claude Guillemin (Ecole
Nationale Superieure de Chimie de Rennes, France) for his help in
conditioning the samples. This work was supported by the French ANR
agency under contract ANR-08-BLAN-0054, the French CNRS-INSU programme
Action sur Projet Physico-Chimie du Milieu Interstellaire and by the
Centre National d'Etudes Spatiales (CNES).
Therese Huet, Therese.Huet(at)univ-lille1.fr
References:
Marstokk & Mollendal, 1973JMoSt..16..259M 1973JMoSt..16..259M Mw spectra of isotopic glycolaldehyde
Hollis et al., 2000ApJ...540L.107H 2000ApJ...540L.107H Interstellar Glycolaldehyde
Jorgensen et al., 2012ApJ...757L...4J 2012ApJ...757L...4J Detection of Glycolaldehyde
(End) Therese R. Huet [PhLAM, France], Patricia Vannier [CDS] 14-Nov-2012