Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence

7 pages, 5 figures, 4 tables

Bibliographic Details
Authors: Agúndez, Marcelino, Molpeceres, Germán, Cabezas, Carlos, Marcelino, Nuria, Tercero, Belén, Fuentetaja, R., Vicente, P. de, Cernicharo, José
Format: article
Status:Published version
Publication Date:2025
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/382181
Online Access:http://hdl.handle.net/10261/382181
https://api.elsevier.com/content/abstract/scopus_id/85217019795
Access Level:Open access
Keyword:Astrochemistry
ISM: individual objects: TMC-1
ISM: molecules
Line: identification
Radio lines: ISM
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spelling Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequenceAgúndez, MarcelinoMolpeceres, GermánCabezas, CarlosMarcelino, NuriaTercero, BelénFuentetaja, R.Vicente, P. deCernicharo, JoséAstrochemistryISM: individual objects: TMC-1ISM: moleculesLine: identificationRadio lines: ISM7 pages, 5 figures, 4 tablesIn recent years, the chemistry of sulfur in the interstellar medium has experienced renewed interest due to the detection of a large variety of molecules containing sulfur. We report the first identification in space of a new S-bearing molecule, thioacetaldehyde (CH3CHS), which is the sulfur counterpart of acetaldehyde (CH3CHO). The astronomical observations are part of QUIJOTE, a Yebes 40 m Q-band line survey of the cold dense cloud TMC-1. We detected seven individual lines corresponding to A and E components of the four most favorable rotational transitions of CH3CHS covered in the Q band (31.0–50.3 GHz). Assuming a rotational temperature of 9 K, we derive a column density of 9.8 × 1010 cm−2 for CH3CHS, which implies that it is 36 times less abundant than its oxygen counterpart CH3CHO. By comparing the column densities of the O- and S-bearing molecules detected in TMC-1, we find that as molecules increase their degree of hydrogenation, sulfur-bearing molecules become less abundant than their oxygen analog. That is, hydrogenation seems to be less favored for S-bearing molecules than for O-bearing ones in cold sources such as TMC-1. We explored potential formation pathways to CH3CHS and implemented them into a chemical model, which underestimates the observed abundance of thioacetaldehyde by several orders of magnitude, however. Quantum chemical calculations carried out for one of the potential formation pathways, the S + C2H5 reaction, indicate that formation of CH3CHS is only a minor channel in this reaction.We acknowledge funding support from Spanish Ministerio de Ciencia, Innovación, y Universidades through grants PID2023-147545NBI00 and RyC-2022-035442-I and from Consejo Superior de Investigaciones Científicas (CSIC) through projects i-LINK23017 SENTINEL and Proyecto Intramural 20245AT016. We acknowledge the computational resources provided by the DRAGO computer cluster managed by SGAI-CSIC, and the Galician Supercomputing Center (CESGA). The supercomputer FinisTerrae III and its permanent data storage system have been funded by the Spanish Ministry of Science and Innovation, the Galician Government and the European Regional Development Fund (ERDF)Peer reviewedEDP SciencesMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas (España)Centro de Supercomputación de GaliciaAgúndez, Marcelino [0000-0001-8803-8684]Cabezas, Carlos [0000-0002-1254-7738]Marcelino, Nuria [0000-0001-7236-4047]Tercero, Belén [0000-0002-4782-5259]Fuentetaja, R. [0000-0002-4859-1458]Vicente, P. de [0000-0002-5902-5005]Cernicharo, José [0000-0002-3518-2524]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/382181https://api.elsevier.com/content/abstract/scopus_id/85217019795reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-147545NB-I00info:eu-repo/grantAgreement/AEI//RyC2022-035442-IAstronomy and Astrophysicshttps://doi.org/10.1051/0004-6361/202453459Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3821812026-05-22T06:33:51Z
dc.title.none.fl_str_mv Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence
title Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence
spellingShingle Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence
Agúndez, Marcelino
Astrochemistry
ISM: individual objects: TMC-1
ISM: molecules
Line: identification
Radio lines: ISM
title_short Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence
title_full Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence
title_fullStr Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence
title_full_unstemmed Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence
title_sort Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence
dc.creator.none.fl_str_mv Agúndez, Marcelino
Molpeceres, Germán
Cabezas, Carlos
Marcelino, Nuria
Tercero, Belén
Fuentetaja, R.
Vicente, P. de
Cernicharo, José
author Agúndez, Marcelino
author_facet Agúndez, Marcelino
Molpeceres, Germán
Cabezas, Carlos
Marcelino, Nuria
Tercero, Belén
Fuentetaja, R.
Vicente, P. de
Cernicharo, José
author_role author
author2 Molpeceres, Germán
Cabezas, Carlos
Marcelino, Nuria
Tercero, Belén
Fuentetaja, R.
Vicente, P. de
Cernicharo, José
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas (España)
Centro de Supercomputación de Galicia
Agúndez, Marcelino [0000-0001-8803-8684]
Cabezas, Carlos [0000-0002-1254-7738]
Marcelino, Nuria [0000-0001-7236-4047]
Tercero, Belén [0000-0002-4782-5259]
Fuentetaja, R. [0000-0002-4859-1458]
Vicente, P. de [0000-0002-5902-5005]
Cernicharo, José [0000-0002-3518-2524]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Astrochemistry
ISM: individual objects: TMC-1
ISM: molecules
Line: identification
Radio lines: ISM
topic Astrochemistry
ISM: individual objects: TMC-1
ISM: molecules
Line: identification
Radio lines: ISM
description 7 pages, 5 figures, 4 tables
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/382181
https://api.elsevier.com/content/abstract/scopus_id/85217019795
url http://hdl.handle.net/10261/382181
https://api.elsevier.com/content/abstract/scopus_id/85217019795
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-147545NB-I00
info:eu-repo/grantAgreement/AEI//RyC2022-035442-I
Astronomy and Astrophysics
https://doi.org/10.1051/0004-6361/202453459
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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