Millimeter and submillimeter wave spectra of mono- 13 C-acetaldehydes
作者： L. Margulès , R. A. Motiyenko , V. V. Ilyushin , J. C. Guillemin
DOI: 10.1051/0004-6361/201425478
关键词:
摘要: Context. The acetaldehyde molecule is ubiquitous in the interstellar medium of our galaxy, and due to its dense complex spectrum, large dipole moment, several low-lying torsional states, considered be a “weed” for radio astronomy observations. Mono- 13 C acetaldehydes CH3CHO CH3 CHO are likely identified astronomical surveys, such as those available with very sensitive ALMA telescope. Laboratory measurements analysis millimeter submillimeter-wave spectra prerequisites successful radioastronomical search new molecular species, well isotopologs already detected molecules. Aims. In this context, provide reliable predictions submillimeter wave ranges, we study rotational these species frequency range from 50 945 GHz. Methods. mono- were recorded using spectrometer based on Schottky-diode frequencymultiplication chains Lille laboratory. molecules analyzed Rho axis method. Results. have assigned 6884 6458 transitions belonging ground, first, second excited states. These fitted together previously published data Hamiltonian models that use 91 87 parameters achieve overall weighted rms deviations 0.88 0.95 CHO. On basis spectroscopic results, transition frequencies up 1 THz J ≤ 60 Ka 20 presented both isotopologs.
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