Far-infrared detection of H3O+ in Sagittarius B21

4 pags., 2 figs.

Detalles Bibliográficos
Autores: Goicoechea, Javier R., Cernicharo, José
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2001
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::b8872e338440aa72d8840e7ed81d4b7d
Acceso en línea:http://hdl.handle.net/10261/192309
Access Level:acceso abierto
Palabra clave:ISM: molecules
Infrared: ISM: lines and bands
Molecular data
ISM: individual (Sagittarius B2)
Line: identification
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oai_identifier_str oai:dnet:digitalcsic_::b8872e338440aa72d8840e7ed81d4b7d
network_acronym_str ES
network_name_str España
repository_id_str
spelling Far-infrared detection of H3O+ in Sagittarius B21Goicoechea, Javier R.Cernicharo, JoséISM: moleculesInfrared: ISM: lines and bandsMolecular dataISM: individual (Sagittarius B2)Line: identification4 pags., 2 figs.We report the first far-infrared detection of the hydronium ion (H3O+) toward the Sagittarius B2 molecular cloud, near the Galactic center. Using the Infrared Space Observatory Long-Wavelength Spectrometer, we have detected three lines arising from the v2 ground-state inversion mode (0+→0-) at 55.3 cm-1. All transitions are observed in absorption against the optically thick infrared continuum emission of the dust. Two different absorption regions can be distinguished, the H3O+ associated with the Sgr B2 extended envelope and that of foreground gas along the line of sight. The derived abundances for both components are rather similar, ≲1 × 10-9, and may explain the high water abundance found in the low-density gas toward Sgr B2 as its dissociative recombination leads to the formation of important molecules OH and H2O. Contribution of the ℚ(1, 1) line of para-H3O+ to the 212-101line of H2 18O is also analyzed. This allows a better determination of water abundance from far-infrared observations. The corrected H2O abundances are ≤10-6 for the diffuse clouds along the line of sight and a few times 10-6 for the gas associated with the Sgr B2 envelope, in good agreement with water vapor observations from the Submillimeter Wave Astronomy Satellite.We thank the Spanish DGES and PNIE for funding support under grants PB96-0883 and ESP98-1351-EPeer ReviewedUniversity of Chicago PressMinisterio de Educación y Ciencia (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920012019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/192309reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#MEC/PB96-0883MEC/ESP98-1351-Ehttps://doi.org/10.1086/321712Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::b8872e338440aa72d8840e7ed81d4b7d2026-05-22T06:33:51Z
dc.title.none.fl_str_mv Far-infrared detection of H3O+ in Sagittarius B21
title Far-infrared detection of H3O+ in Sagittarius B21
spellingShingle Far-infrared detection of H3O+ in Sagittarius B21
Goicoechea, Javier R.
ISM: molecules
Infrared: ISM: lines and bands
Molecular data
ISM: individual (Sagittarius B2)
Line: identification
title_short Far-infrared detection of H3O+ in Sagittarius B21
title_full Far-infrared detection of H3O+ in Sagittarius B21
title_fullStr Far-infrared detection of H3O+ in Sagittarius B21
title_full_unstemmed Far-infrared detection of H3O+ in Sagittarius B21
title_sort Far-infrared detection of H3O+ in Sagittarius B21
dc.creator.none.fl_str_mv Goicoechea, Javier R.
Cernicharo, José
author Goicoechea, Javier R.
author_facet Goicoechea, Javier R.
Cernicharo, José
author_role author
author2 Cernicharo, José
author2_role author
dc.contributor.none.fl_str_mv Ministerio de Educación y Ciencia (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv ISM: molecules
Infrared: ISM: lines and bands
Molecular data
ISM: individual (Sagittarius B2)
Line: identification
topic ISM: molecules
Infrared: ISM: lines and bands
Molecular data
ISM: individual (Sagittarius B2)
Line: identification
description 4 pags., 2 figs.
publishDate 2001
dc.date.none.fl_str_mv 2001
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/10261/192309
url http://hdl.handle.net/10261/192309
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#
MEC/PB96-0883
MEC/ESP98-1351-E
https://doi.org/10.1086/321712
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 15,812455

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