A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object

53 pags., 8 figs., 3 tabs.

Detalhes bibliográficos
Autores: Agúndez, Marcelino, Marcelino, Nuria, Cernicharo, José, Roueff, E., Tafalla, M.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/203990
Acesso em linha:http://hdl.handle.net/10261/203990
Access Level:acceso abierto
Palavra-chave:Astrochemistry
Line: identification
ISM: clouds
ISM: molecules
Radio lines: ISM
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dc.title.none.fl_str_mv A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object
title A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object
spellingShingle A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object
Agúndez, Marcelino
Astrochemistry
Line: identification
ISM: clouds
ISM: molecules
Radio lines: ISM
title_short A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object
title_full A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object
title_fullStr A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object
title_full_unstemmed A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object
title_sort A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 object
dc.creator.none.fl_str_mv Agúndez, Marcelino
Marcelino, Nuria
Cernicharo, José
Roueff, E.
Tafalla, M.
author Agúndez, Marcelino
author_facet Agúndez, Marcelino
Marcelino, Nuria
Cernicharo, José
Roueff, E.
Tafalla, M.
author_role author
author2 Marcelino, Nuria
Cernicharo, José
Roueff, E.
Tafalla, M.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Economía y Competitividad (España)
Centre National de la Recherche Scientifique (France)
Centre National D'Etudes Spatiales (France)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Astrochemistry
Line: identification
ISM: clouds
ISM: molecules
Radio lines: ISM
topic Astrochemistry
Line: identification
ISM: clouds
ISM: molecules
Radio lines: ISM
description 53 pags., 8 figs., 3 tabs.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/203990
url http://hdl.handle.net/10261/203990
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79006-P
http://dx.doi.org/10.1051/0004-6361/201935164
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dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
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)
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spelling A sensitive λ 3 mm line survey of L483. A broad view of the chemical composition of a core around a Class 0 objectAgúndez, MarcelinoMarcelino, NuriaCernicharo, JoséRoueff, E.Tafalla, M.AstrochemistryLine: identificationISM: cloudsISM: moleculesRadio lines: ISM53 pags., 8 figs., 3 tabs.An exhaustive chemical characterization of dense cores is mandatory to our understanding of chemical composition changes from a starless to a protostellar stage. However, only a few sources have had their molecular composition characterized in detail. Here we present a ¿ 3 mm line survey of L483, a dense core around a Class 0 protostar, which was observed with the IRAM 30 m telescope in the 80-116 GHz frequency range. We detected 71 molecules (140 including different isotopologs), most of which are present in the cold and quiescent ambient cloud according to their narrow lines (FWHM 0.5 km s-1) and low rotational temperatures (¿10 K). Of particular interest among the detected molecules are the cis isomer of HCOOH, the complex organic molecules HCOOCH3, CH3OCH3, and C2H5OH, a wide variety of carbon chains, nitrogen oxides like N2O, and saturated molecules like CH3SH, in addition to eight new interstellar molecules (HCCO, HCS, HSC, NCCNH+, CNCN, NCO, H2NCO+, and NS+) whose detection has already been reported. In general, fractional molecular abundances in L483 are systematically lower than in TMC-1 (especially for carbon chains), tend to be higher than in L1544 and B1-b, and are similar to those in L1527. Apart from the overabundance of carbon chains in TMC-1, we find that L483 does not have a marked chemical differentiation with respect to starless/prestellar cores like TMC-1 and L1544, although it does chemically differentiate from Class 0 hot corino sources like IRAS 16293-2422. This fact suggests that the chemical composition of the ambient cloud of some Class 0 sources could be largely inherited from the dark cloud starless/prestellar phase. We explore the use of potential chemical evolutionary indicators, such as the HNCO/C3S, SO2/C2S, and CH3SH/C2S ratios, to trace the prestellar/protostellar transition. We also derived isotopic ratios for a variety of molecules, many of which show isotopic ratios close to the values for the local interstellar medium (remarkably all those involving 34S and 33S), while there are also several isotopic anomalies like an extreme depletion in 13C for one of the two isotopologs of c-C3H2, a drastic enrichment in 18O for SO and HNCO (SO being also largely enriched in 17O), and different abundances for the two 13C substituted species of C2H and the two 15N substituted species of N2H+. We report the first detection in space of some minor isotopologs like c-C3D. The exhaustive chemical characterization of L483 presented here, together with similar studies of other prestellar and protostellar sources, should allow us to identify the main factors that regulate the chemical composition of cores along the process of formation of low-mass protostars. A copy of the reduced spectrum (FITS file) is available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/625/A147Based on observations carried out with the IRAM 30 m Telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain).M.A., N.M., and J.C. acknowledge funding support from the European Research Council (ERC Grant 610256: NANOCOSMOS) and from Spanish MICINN through grant AYA2016-75066-C2-1-P. M.A. also thanks funding support from the Ramón y Cajal programme of Spanish MICINN (RyC-2014-16277). M.T. acknowledges support from Spanish MICINN under grant AYA2016-79006-P. E.R. acknowledges the support of the Programme National >Physique et Chimie du Milieu Interstellaire> (PCMI) of CNRS/INSU with INC/INP co-funded by CEA and CNES.Springer NatureEuropean CommissionMinisterio de Economía y Competitividad (España)Centre National de la Recherche Scientifique (France)Centre National D'Etudes Spatiales (France)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020192020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/203990reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/610256info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-75066-C2-1-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79006-Phttp://dx.doi.org/10.1051/0004-6361/201935164Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2039902026-05-22T06:33:51Z
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