Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A

MWC 349A is a massive star with a well-known circumstellar disk rotating following a Keplerian law, and an ionized wind launched from the disk surface. Recent observations with the Atacama Large Millimeter/submillimeter Array (ALMA) carried out toward this system, however, have revealed an additiona...

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Autores: Martínez-Henares, Antonio, Jiménez-Serra, Izaskun, Martín-Pintado, Jesús, Huélamo, Nuria, Prasad, Sirina, Zhang, Qizhou, Moran, James, Cao, Yue, Báez-Rubio, A.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/378182
Acesso em linha:http://hdl.handle.net/10261/378182
Access Level:acceso abierto
Palavra-chave:Massive stars
Circumstellar masers
H II regions
Stellar winds
Stellar jets
Stellar accretion disks
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spelling Modeling of the High-velocity Jet Powered by the Massive Star MWC 349AMartínez-Henares, AntonioJiménez-Serra, IzaskunMartín-Pintado, JesúsHuélamo, NuriaPrasad, SirinaZhang, QizhouMoran, JamesCao, YueBáez-Rubio, A.Massive starsCircumstellar masersH II regionsStellar windsStellar jetsStellar accretion disksMWC 349A is a massive star with a well-known circumstellar disk rotating following a Keplerian law, and an ionized wind launched from the disk surface. Recent observations with the Atacama Large Millimeter/submillimeter Array (ALMA) carried out toward this system, however, have revealed an additional high-velocity component in the strong, maser emission of hydrogen radio recombination lines (RRLs), suggesting the presence of a high-velocity ionized jet. In this work, we present 3D non-LTE radiative transfer modeling of the emission of the H30α and H26α maser lines, and of their associated radio continuum emission, toward MWC 349A. By using the MORELI code, we reproduce the spatial distribution and kinematics of the high-velocity emission of the H30α and H26α maser lines with a high-velocity ionized jet expanding at a velocity of ∼250 km s−1, surrounded by MWC 349A's wide-angle ionized wind. The bipolar jet, which is launched from MWC 349A's disk, is poorly collimated and slightly misaligned with respect to the disk rotation axis. Thanks to the unprecedented sensitivity and spatial accuracy provided by ALMA, we also find that the already known, wide-angle ionized wind decelerates as it expands radially from the ionized disk. We briefly discuss the implications of our findings for understanding the formation and evolution of massive stars. Our results show the huge potential of RRL masers as powerful probes of the innermost ionized regions around massive stars and of their high-velocity jets.This research has been funded by grant No. PID2019-105552RB-C41 by the Spanish Ministry of Science and Innovation/State Agency of Research MCIN/AEI/10.13039/501100011033. A.M.-H. has received support from grant MDM-2017-0737 Unidad de Excelencia "María de Maeztu" Centro de Astrobiología (CAB, CSIC-INTA) funded by MCIN/AEI/10.13039/501100011033. N.H. is funded by Spanish MCIN/AEI/10.13039/501100011033 grant PID2019-107061GB-C61.With funding from the Spanish government through the ‘María de Maeztu Unit of Excelence’ accreditation (MDM-2017-0737).Peer reviewedAmerican Astronomical SocietyIOP PublishingMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)Ministerio de Ciencia e Innovación (España)Agencia Estatal de Investigación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/378182reponame: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 2017-2020/PID2019-105552RB-C41info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/MDM-2017-0737https://doi.org/10.3847/1538-4357/acebcdSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3781822026-05-22T06:33:51Z
dc.title.none.fl_str_mv Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A
title Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A
spellingShingle Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A
Martínez-Henares, Antonio
Massive stars
Circumstellar masers
H II regions
Stellar winds
Stellar jets
Stellar accretion disks
title_short Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A
title_full Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A
title_fullStr Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A
title_full_unstemmed Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A
title_sort Modeling of the High-velocity Jet Powered by the Massive Star MWC 349A
dc.creator.none.fl_str_mv Martínez-Henares, Antonio
Jiménez-Serra, Izaskun
Martín-Pintado, Jesús
Huélamo, Nuria
Prasad, Sirina
Zhang, Qizhou
Moran, James
Cao, Yue
Báez-Rubio, A.
author Martínez-Henares, Antonio
author_facet Martínez-Henares, Antonio
Jiménez-Serra, Izaskun
Martín-Pintado, Jesús
Huélamo, Nuria
Prasad, Sirina
Zhang, Qizhou
Moran, James
Cao, Yue
Báez-Rubio, A.
author_role author
author2 Jiménez-Serra, Izaskun
Martín-Pintado, Jesús
Huélamo, Nuria
Prasad, Sirina
Zhang, Qizhou
Moran, James
Cao, Yue
Báez-Rubio, A.
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Ministerio de Ciencia e Innovación (España)
Agencia Estatal de Investigación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Massive stars
Circumstellar masers
H II regions
Stellar winds
Stellar jets
Stellar accretion disks
topic Massive stars
Circumstellar masers
H II regions
Stellar winds
Stellar jets
Stellar accretion disks
description MWC 349A is a massive star with a well-known circumstellar disk rotating following a Keplerian law, and an ionized wind launched from the disk surface. Recent observations with the Atacama Large Millimeter/submillimeter Array (ALMA) carried out toward this system, however, have revealed an additional high-velocity component in the strong, maser emission of hydrogen radio recombination lines (RRLs), suggesting the presence of a high-velocity ionized jet. In this work, we present 3D non-LTE radiative transfer modeling of the emission of the H30α and H26α maser lines, and of their associated radio continuum emission, toward MWC 349A. By using the MORELI code, we reproduce the spatial distribution and kinematics of the high-velocity emission of the H30α and H26α maser lines with a high-velocity ionized jet expanding at a velocity of ∼250 km s−1, surrounded by MWC 349A's wide-angle ionized wind. The bipolar jet, which is launched from MWC 349A's disk, is poorly collimated and slightly misaligned with respect to the disk rotation axis. Thanks to the unprecedented sensitivity and spatial accuracy provided by ALMA, we also find that the already known, wide-angle ionized wind decelerates as it expands radially from the ionized disk. We briefly discuss the implications of our findings for understanding the formation and evolution of massive stars. Our results show the huge potential of RRL masers as powerful probes of the innermost ionized regions around massive stars and of their high-velocity jets.
publishDate 2023
dc.date.none.fl_str_mv 2023
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/10261/378182
url http://hdl.handle.net/10261/378182
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 2017-2020/PID2019-105552RB-C41
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/MDM-2017-0737
https://doi.org/10.3847/1538-4357/acebcd
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Astronomical Society
IOP Publishing
publisher.none.fl_str_mv American Astronomical Society
IOP Publishing
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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