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. =2013A&A...549A..96H ================================================================================ ADC_Keywords: Atomic physics Keywords: ISM: molecules - submillimeter: ISM - methods: laboratory - line: identification Abstract: Glycolaldehyde (CH_2_OHCHO) 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 ^13^C-isotopologues of glycolaldehyde in the interstellar medium, their rotational spectra in the millimeter and submillimeter-wave regions were studied. The spectra of ^13^CH_2_OHCHO and CH_2_OH^13^CHO 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 ^13^CH_2_OHCHO were not confirmed. The provided line-lists and sets of molecular parameters meet the needs for a first astrophysical search of ^13^C-glycolaldehydes. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3.dat 57 9400 Data file of ^13^CH_2_OHCHO table4.dat 57 10522 Data file of CH_2_OH^13^CHO -------------------------------------------------------------------------------- See also: J/ApJS/158/188 : Detection of glycolaldehyde toward Sgr B2 (Widicus+, 2005) Byte-by-byte Description of file: table3.dat table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Note (1): levels are "g.s." (ground state), "v1=1", "v2=1" or "v3=1" -------------------------------------------------------------------------------- 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 Mw spectra of isotopic glycolaldehyde Hollis et al., 2000ApJ...540L.107H Interstellar Glycolaldehyde Jorgensen et al., 2012ApJ...757L...4J Detection of Glycolaldehyde ================================================================================ (End) Therese R. Huet [PhLAM, France], Patricia Vannier [CDS] 14-Nov-2012