Millimetre-wave spectroscopy of 2-hydroxyprop-2-enal and an astronomical search with ALMA
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Millimetre-wave spectroscopy of 2-hydroxyprop-2-enal and an astronomical search with ALMA. / Koucky, J.; Kolesnikova, L.; Lukova, K.; Vavra, K.; Kania, P.; Coutens, A.; Loison, J-C; Jorgensen, J. K.; Belloche, A.; Urban, S.
I: Astronomy & Astrophysics, Bind 666, A158, 21.10.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Millimetre-wave spectroscopy of 2-hydroxyprop-2-enal and an astronomical search with ALMA
AU - Koucky, J.
AU - Kolesnikova, L.
AU - Lukova, K.
AU - Vavra, K.
AU - Kania, P.
AU - Coutens, A.
AU - Loison, J-C
AU - Jorgensen, J. K.
AU - Belloche, A.
AU - Urban, S.
PY - 2022/10/21
Y1 - 2022/10/21
N2 - Context. Several sugar-like molecules have been found in the interstellar medium (ISM). The molecule studied in this work, 2-hydroxyprop-2-enal, is among the candidates to be searched for, as it is a dehydration product of C-3 sugars and contains structural motifs that are typical for some interstellar molecules. Furthermore, it has recently been predicted that it is more abundant in the ISM than its tentatively detected isomer 3-hydroxypropenal.Aims. So far, only low-frequency microwave data of 2-hydroxyprop-2-enal have been published. The aim of this work is to deepen our knowledge about the millimetre-wave spectrum of 2-hydroxyprop-2-enal, enabling its detailed search towards astronomical objects. In particular, we target the solar-type protostar IRAS 16293-2422 and the star-forming region Sagittarius (Sgr) B2(N).Methods. The rotational spectrum of 2-hydroxyprop-2-enal was measured and analysed in the frequency regions of 128-166 GHz and 285-329 GHz. The interstellar exploration towards IRAS 16293-2422 was based on the Atacama Large Millimeter/submillimeter Array (ALMA) data of the Protostellar Interferometric Line Survey (PILS). We also used the imaging spectral line survey ReMoCA performed with ALMA towards Sgr B2(N) to search for 2-hydroxyprop-2-enal in the ISM. We modelled the astronomical spectra under the assumption of local thermodynamic equilibrium (LTE).Results. We provide laboratory analysis of hundreds of rotational transitions of 2-hydroxyprop-2-enal in the ground state and the lowest lying excited vibrational state. We report its non-detection towards IRAS 16293 B. The 2-hydroxyprop-2-ena1/3-hydroxypropenal abundance ratio is estimated to beConclusions. Despite the non-detections of 2-hydroxyprop-2-enal, the results of this work represent a significant improvement on previous investigations in the microwave region and meet the requirements for further searches for this molecule in the ISM.
AB - Context. Several sugar-like molecules have been found in the interstellar medium (ISM). The molecule studied in this work, 2-hydroxyprop-2-enal, is among the candidates to be searched for, as it is a dehydration product of C-3 sugars and contains structural motifs that are typical for some interstellar molecules. Furthermore, it has recently been predicted that it is more abundant in the ISM than its tentatively detected isomer 3-hydroxypropenal.Aims. So far, only low-frequency microwave data of 2-hydroxyprop-2-enal have been published. The aim of this work is to deepen our knowledge about the millimetre-wave spectrum of 2-hydroxyprop-2-enal, enabling its detailed search towards astronomical objects. In particular, we target the solar-type protostar IRAS 16293-2422 and the star-forming region Sagittarius (Sgr) B2(N).Methods. The rotational spectrum of 2-hydroxyprop-2-enal was measured and analysed in the frequency regions of 128-166 GHz and 285-329 GHz. The interstellar exploration towards IRAS 16293-2422 was based on the Atacama Large Millimeter/submillimeter Array (ALMA) data of the Protostellar Interferometric Line Survey (PILS). We also used the imaging spectral line survey ReMoCA performed with ALMA towards Sgr B2(N) to search for 2-hydroxyprop-2-enal in the ISM. We modelled the astronomical spectra under the assumption of local thermodynamic equilibrium (LTE).Results. We provide laboratory analysis of hundreds of rotational transitions of 2-hydroxyprop-2-enal in the ground state and the lowest lying excited vibrational state. We report its non-detection towards IRAS 16293 B. The 2-hydroxyprop-2-ena1/3-hydroxypropenal abundance ratio is estimated to beConclusions. Despite the non-detections of 2-hydroxyprop-2-enal, the results of this work represent a significant improvement on previous investigations in the microwave region and meet the requirements for further searches for this molecule in the ISM.
KW - astrochemistry
KW - ISM: molecules
KW - line: identification
KW - ISM: individual objects: IRAS 16293-2422
KW - ISM: individual objects: Sagittarius B2
KW - astronomical databases: miscellaneous
KW - COMPLEX ORGANIC-MOLECULES
KW - ROTATIONAL SPECTRUM
KW - MICROWAVE DETECTION
KW - IRAS 16293-2422
KW - SGR B2(N)
KW - ACRYLONITRILE
KW - HYDROXYACETONE
KW - MALONALDEHYDE
KW - PROTOSTELLAR
KW - DETECTIONS
U2 - 10.1051/0004-6361/202244376
DO - 10.1051/0004-6361/202244376
M3 - Journal article
VL - 666
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A158
ER -
ID: 324553098