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J/A+A/540/A51    Submm spectrum of deuterated glycolaldehydes   (Bouchez+, 2012)

The submillimeter spectrum of deuterated glycolaldehydes. Bouchez A., Margules L., Motiyenko R. A., Guillemin J-C., Walters A., Bottinelli S., Ceccarelli C., Kahane C. <Astron. Astrophys. 540, A51 (2012)> =2012A&A...540A..51B
ADC_Keywords: Atomic physics ; Interstellar medium ; Millimetric/submm sources ; Spectroscopy Keywords: ISM: molecules - methods: laboratory - submillimeter: ISM - molecular data - line: identification Abstract: Glycolaldehyde, a sugar-related interstellar prebiotic molecule, has recently been detected in two star-forming regions, Sgr B2(N) and G31.41+0.31. The detection of this new species increased the list of complex organic molecules detected in the interstellar medium (ISM) and adds another level to the chemical complexity present in space. Besides, this kind of organic molecule is important because it is directly linked to the origin of life. For many years, astronomers have been struggling to understand the origin of this high chemical complexity in the ISM. The study of deuteration may provide crucial hints. Description: We have measured in the laboratory the spectra of deuterated isotopologues of glycolaldehyde: the three mono-deuterated ones (CH2OD-CHO, CHDOH-CHO and CH2OH-CDO) and one dideuterated derivative (CHDOH-CDO) in the ground vibrational state. We used a solid-state submillimeter-wave spectrometer in Lille with an accuracy for isolated lines better than 30kHz to acquire new spectroscopic data between 150 and 630GHz. We measured around 900 new lines for each isotopologue and determined spectroscopic parameters. Each table (2 to 5) contain all measured lines of CH2OD-CHO, CHDOH-CHO, CH2OHCDO and CHDOH-CDO respectively. For each quantum numbers, frequency, residual (obs-calc), assumed experimental uncertainties and intensity weighting for blended lines are given. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 52 1433 Fit file of CH2ODCHO table3.dat 52 1340 Fit file of CHDOHCHO table4.dat 52 1232 Fit file of CH2OHCDO table5.dat 52 1361 Fit file of CHDOHCDO
See also: J/ApJ/499/517 : Ethylene oxide spectrum (Pan+, 1998) J/ApJS/166/650 : mm/sbmm spectrum of iso-propanol (Maeda+, 2006) J/ApJS/162/428 : n-propanol transition frequencies (Maeda+, 2006) J/A+A/455/1161 : Rest frequencies of sub-mm spectrum of SiN (Bizzocchi+, 2006) J/ApJS/169/28 : Rotational transitions of Methyl carbamate (Groner+, 2007) J/ApJS/181/433 : Spectrum of ethyl formate (Medvedev+, 2009) J/ApJS/190/315 : Rotational spectrum of H13COOCH3 (Carvajal+, 2010) J/ApJS/158/188 : Detection of glycolaldehyde toward Sgr B2 (Widicus+, 2005) Byte-by-byte Description of file: table2.dat table3.dat table4.dat table5.dat
Bytes Format Units Label Explanations
1- 2 I2 --- J' Quantum number (upper state) 4- 5 I2 --- Ka' Quantum number (upper state) 7- 8 I2 --- Kc' Quantum number (upper state) 10- 11 I2 --- J" Quantum number (lower state) 13- 14 I2 --- Ka" Quantum number (lower state) 16- 17 I2 --- Kc" Quantum number (lower state) 19- 29 F11.4 MHz Freq [150000/630000] Frequency (150-630GHz) 31- 37 F7.4 MHz O-C Residual (observed minus calculated value) 39- 44 F6.4 MHz error Assumed experimental uncertainty 46- 52 E7.3 --- Iweight Intensity weighting for blended lines
Acknowledgements: Aurelia Bouchez, abouchez(at)irap.omp.eu
(End) Aurelia Bouchez [IRAP, France], Patricia Vannier [CDS] 06-Feb-2012
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