2026-04-14T19:24:20Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/658652025-03-04T09:40:43Zcom_10324_1186com_10324_931com_10324_894col_10324_1404

Alonso Alonso, Elena Rita McGuire, Brett A. Kolesniková, Lucie Carroll, P. Brandon León Ona, Iker Brogan, Crystal L. Hunter, Todd R. Guillemin, Jean-Claude Alonso Hernández, José Luis 2024-02-06T19:35:42Z 2024-02-06T19:35:42Z 2019 The Astrophysical Journal, Volume 883, Number 1 0004-637X https://uvadoc.uva.es/handle/10324/65865 10.3847/1538-4357/ab3463 18 1 The Astrophysical Journal 883 1538-4357 We present a laboratory rotational study of, and astronomical search for, lactaldehyde (CH3CH(OH)CH(O)), one of the simplest chiral molecules that could reasonably be seen in the interstellar medium (ISM), in the millimetre and submillimetre wave regions from 80 to 460GHz. More than 5000 transitions were assigned to the most stable conformer, and a set of spectroscopic constants was accurately determined. Lactaldehyde is involved in numerous metabolic pathways used by life on Earth, and is a logical step up in complexity from glycolaldehyde (CH(O)CH2OH) which is being detected with increasing regularity in the ISM. We present an accompanying radio astronomical search for lactaldehyde in three high-mass star-forming regions (NGC6334I, SgrB2(N), and OrionKL) as well as in the publicly available data from the ASAI Large Project. Neither molecule is detected in these sources, and we report corresponding upper limits to the column densities. We discuss the potential utility of lactaldehyde in combination with other members of the [C3, H6, O2] isomeric family in probing pathways of chemical evolution in the ISM. spa info:eu-repo/semantics/restrictedAccess The American Astronomical Society The Laboratory Millimeter and Submillimeter Rotational Spectrum of Lactaldehyde and an Astronomical Search in Sgr B2(N), Orion-KL, and NGC 6334I info:eu-repo/semantics/article