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The ALMA-PILS survey: First tentative detection of 3-hydroxypropenal (HOCHCHCHO) in the interstellar medium and chemical modeling of the C3H4O2 isomers

hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
dc.contributor.authorCOUTENS, A.
dc.contributor.authorLOISON, J.-C.
dc.contributor.authorBOULANGER, A.
hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
dc.contributor.authorCAUX, E.
dc.contributor.authorMÜLLER, H. S. P.
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorWAKELAM, V.
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
dc.contributor.authorMANIGAND, S.
dc.contributor.authorJØRGENSEN, J. K.
dc.date.issued2022-04
dc.identifier.issn0004-6361
dc.description.abstractEnCharacterizing the molecular composition of solar-type protostars is useful for improving our understanding of the physico-chemical conditions under which the Sun and its planets formed. In this work, we analyzed the Atacama Large Millimeter/submillimeter Array (ALMA) data of the Protostellar Interferometric Line Survey (PILS), an unbiased spectral survey of the solar-type protostar IRAS 16293–2422, and we tentatively detected 3-hydroxypropenal (HOCHCHCHO) for the first time in the interstellar medium towards source B. Based on the observed line intensities and assuming local thermodynamic equilibrium, its column density is constrained to be ∼1015 cm−2, corresponding to an abundance of 10−4 relative to methanol, CH3OH. Additional spectroscopic studies are needed to constrain the excitation temperature of this molecule. We included HOCHCHCHO and five of its isomers in the chemical network presented in Manigand et al. (2021, A&A, 645, A53) and we predicted their chemical evolution with the Nautilus code. The model reproduces the abundance of HOCHCHCHO within the uncertainties. This species is mainly formed through the grain surface reaction CH2CHO + HCO → HCOCH2CHO, followed by the tautomerization of HCOCH2CHO into HOCHCHCHO. Two isomers, CH3COCHO and CH2COHCHO, are predicted to be even more abundant than HOCHCHCHO. Spectroscopic studies of these molecules are essential in searching for them in IRAS 16293–2422 and other astrophysical sources.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enastrochemistry
dc.subject.enstars: formation
dc.subject.enstars: protostars
dc.subject.enISM: molecules
dc.subject.enISM: individual objects: IRAS 16293−2422
dc.title.enThe ALMA-PILS survey: First tentative detection of 3-hydroxypropenal (HOCHCHCHO) in the interstellar medium and chemical modeling of the C3H4O2 isomers
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/202243038
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv2203.14119
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageL6
bordeaux.volume660
bordeaux.peerReviewedoui
hal.identifierhal-03634712
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03634712v1
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