Detection of vibrationally excited HC7N and HC9N in IRC +10216

12 pags., 8 figs., 8 tabs.-- Section: Letters to the Editor

Detalles Bibliográficos
Autores: Pardo Carrión, Juan Ramón, Bermúdez, Celina, Cabezas, Carlos, Agúndez, Marcelino, Gallego, J. D., Fonfría, José Pablo, Velilla Prieto, L., Quintana-Lacaci, G., Tercero, B., Guélin, M., Cernicharo, José
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/222403
Acceso en línea:http://hdl.handle.net/10261/222403
Access Level:acceso abierto
Palabra clave:Molecular data
Line: identification
Stars: carbon
Circumstellar matter
Stars: individual: IRC+10216
Astrochemistry
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spelling Detection of vibrationally excited HC7N and HC9N in IRC +10216Pardo Carrión, Juan RamónBermúdez, CelinaCabezas, CarlosAgúndez, MarcelinoGallego, J. D.Fonfría, José PabloVelilla Prieto, L.Quintana-Lacaci, G.Tercero, B.Guélin, M.Cernicharo, JoséMolecular dataLine: identificationStars: carbonCircumstellar matterStars: individual: IRC+10216Astrochemistry12 pags., 8 figs., 8 tabs.-- Section: Letters to the EditorObservations of IRC +10216 with the Yebes 40 m telescope between 31 and 50 GHz have revealed more than 150 unidentified lines. Some of them can be grouped into a new series of 26 doublets, harmonically related with integer quantum numbers ranging from Jup = 54 to 80. The separation of the doublets increases systematically with J, that is to say, as expected for a linear species in one of its bending modes. The rotational parameters resulting from the fit to these data are B = 290.8844 ± 0.0004 MHz, D = 0.88 ± 0.04 Hz, and q = 0.1463 ± 0.0001 MHz. The rotational constant is very close to that of the ground state of HC9N. Our ab initio calculations show an excellent agreement between these parameters and those predicted for the lowest energy vibrationally excited state, ν19 = 1, of HC9N. This is the first detection, and complete characterization in space, of vibrationally excited HC9N. An energy of 41.5 cm-1 is estimated for the ν19 state. In addition, 17 doublets of HC7N in the ν15 = 1 state, for which laboratory spectroscopy is available, were detected for the first time in IRC +10216. Several doublets of HC5N in its ν11 = 1 state were also observed. The column density ratio between the ground and the lowest excited vibrational states are ≈127, 9.5, and 1.5 for HC5N, HC7N, and HC9N, respectively. We find that these lowest-lying vibrational states are most probably populated via infrared pumping to vibrationally excited states lying at ≈600 cm-1. The lowest vibrationally excited states thus need to be taken into account to precisely determine absolute abundances and abundance ratios for long carbon chains. The abundance ratios N(HC5N)/N(HC7N) and N(HC7N)/N(HC9N) are 2.4 and 7.7, respectively.he Spanish authors thank Ministerio de Ciencia e Innovación for funding support through project AYA2016-75066-C2-1-P. We also thank ERC for funding through grant ERC-2013-Syg-610256-NANOCOSMOS. MA thanks Ministerio de Ciencia e Innovación for Ramón y Cajal grant RyC2014-16277. CB thanks Ministerio de Ciencia e Innovación for Juan de la Cierva grant FJCI-2016-27983. LVP acknowledges support from the Swedish Research Council and from the ERC through the consolidatorSpringer NatureMinisterio de Economía y Competitividad (España)European Research CouncilEuropean CommissionSwedish Research CouncilConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/222403reponame: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/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-75066-C2-1-Pinfo:eu-repo/grantAgreement/EC/FP7/610256http://dx.doi.org/10.1051/0004-6361/202038571Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2224032026-05-22T06:33:51Z
dc.title.none.fl_str_mv Detection of vibrationally excited HC7N and HC9N in IRC +10216
title Detection of vibrationally excited HC7N and HC9N in IRC +10216
spellingShingle Detection of vibrationally excited HC7N and HC9N in IRC +10216
Pardo Carrión, Juan Ramón
Molecular data
Line: identification
Stars: carbon
Circumstellar matter
Stars: individual: IRC+10216
Astrochemistry
title_short Detection of vibrationally excited HC7N and HC9N in IRC +10216
title_full Detection of vibrationally excited HC7N and HC9N in IRC +10216
title_fullStr Detection of vibrationally excited HC7N and HC9N in IRC +10216
title_full_unstemmed Detection of vibrationally excited HC7N and HC9N in IRC +10216
title_sort Detection of vibrationally excited HC7N and HC9N in IRC +10216
dc.creator.none.fl_str_mv Pardo Carrión, Juan Ramón
Bermúdez, Celina
Cabezas, Carlos
Agúndez, Marcelino
Gallego, J. D.
Fonfría, José Pablo
Velilla Prieto, L.
Quintana-Lacaci, G.
Tercero, B.
Guélin, M.
Cernicharo, José
author Pardo Carrión, Juan Ramón
author_facet Pardo Carrión, Juan Ramón
Bermúdez, Celina
Cabezas, Carlos
Agúndez, Marcelino
Gallego, J. D.
Fonfría, José Pablo
Velilla Prieto, L.
Quintana-Lacaci, G.
Tercero, B.
Guélin, M.
Cernicharo, José
author_role author
author2 Bermúdez, Celina
Cabezas, Carlos
Agúndez, Marcelino
Gallego, J. D.
Fonfría, José Pablo
Velilla Prieto, L.
Quintana-Lacaci, G.
Tercero, B.
Guélin, M.
Cernicharo, José
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
European Research Council
European Commission
Swedish Research Council
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Molecular data
Line: identification
Stars: carbon
Circumstellar matter
Stars: individual: IRC+10216
Astrochemistry
topic Molecular data
Line: identification
Stars: carbon
Circumstellar matter
Stars: individual: IRC+10216
Astrochemistry
description 12 pags., 8 figs., 8 tabs.-- Section: Letters to the Editor
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
2020
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/10261/222403
url http://hdl.handle.net/10261/222403
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/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-75066-C2-1-P
info:eu-repo/grantAgreement/EC/FP7/610256
http://dx.doi.org/10.1051/0004-6361/202038571
Sí
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)
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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