Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027

4 pags., 3 figs., 1 tab.

Detalles Bibliográficos
Autores: Cernicharo, José, Liu, X.- W., González-Alfonso, E., Cox, P., Barlow, M. J., Lim, T., Swinyard, B. M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1997
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/191953
Acceso en línea:http://hdl.handle.net/10261/191953
Access Level:acceso abierto
Palabra clave:Planetary nebulae: individual (NGC 7027)
Infrared: ISM: lines and bands
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spelling Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027Cernicharo, JoséLiu, X.- W.González-Alfonso, E.Cox, P.Barlow, M. J.Lim, T.Swinyard, B. M.Planetary nebulae: individual (NGC 7027)Infrared: ISM: lines and bands4 pags., 3 figs., 1 tab.We report the discovery of the rotational spectrum of CH+ in the Infrared Space Observatory Long Wavelength Spectrometer (LWS) spectrum of the planetary nebula NGC 7027. The identification relies on a 1996 reanalysis of the LWS spectrum by Liu et al. and on new LWS data. The strong line at 179.62 μm (coinciding with the 212-loi transition of water vapor) and the lines at 119.90 and 90.03 /zm (reported as unidentified by Liu et al.), whose frequencies are in the harmonic relation 2:3:4, are shown to arise from the J = 2-1, 3-2, and 4-3 rotational transitions of CH+. This identification is strengthened by the new LWS spectra of NGC 7027, which clearly show the next two rotational lines of CH+ at 72.140 and 60.247 μm. This is the first time that the pure rotational spectrum of CH+ has been observed. This discovery opens the possibility of probing the densest and warmest zones of photodissociation regions. We derive a rotational temperature for the CH+ lines of 150 ± 20 K and a CH+/CO abundance ratio of 2-6 × 10-4. © 1997. The American Astronomical Society. All rights reserved.Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the Principal Investigator countries: France, Germany, the Netherlands, and the United Kingdom) and with the participation of ISAS and NASA.Peer ReviewedUniversity of Chicago PressNASAEuropean Space AgencyConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201919972019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/191953reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1086/310729Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1919532026-05-22T06:33:51Z
dc.title.none.fl_str_mv Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027
title Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027
spellingShingle Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027
Cernicharo, José
Planetary nebulae: individual (NGC 7027)
Infrared: ISM: lines and bands
title_short Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027
title_full Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027
title_fullStr Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027
title_full_unstemmed Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027
title_sort Discovery of far-infrared pure rotational transitions of CH+ in NGC 7027
dc.creator.none.fl_str_mv Cernicharo, José
Liu, X.- W.
González-Alfonso, E.
Cox, P.
Barlow, M. J.
Lim, T.
Swinyard, B. M.
author Cernicharo, José
author_facet Cernicharo, José
Liu, X.- W.
González-Alfonso, E.
Cox, P.
Barlow, M. J.
Lim, T.
Swinyard, B. M.
author_role author
author2 Liu, X.- W.
González-Alfonso, E.
Cox, P.
Barlow, M. J.
Lim, T.
Swinyard, B. M.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv NASA
European Space Agency
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Planetary nebulae: individual (NGC 7027)
Infrared: ISM: lines and bands
topic Planetary nebulae: individual (NGC 7027)
Infrared: ISM: lines and bands
description 4 pags., 3 figs., 1 tab.
publishDate 1997
dc.date.none.fl_str_mv 1997
2019
2019
2019
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/10261/191953
url http://hdl.handle.net/10261/191953
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1086/310729
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv University of Chicago Press
publisher.none.fl_str_mv University of Chicago Press
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 15,811543

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