Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA
Proto- and young planetary nebulae comprise dense circumstellar envelopes made of molecular gas and dust, some of which hide compact ionized cores that host stellar systems with hot objects, and show high-velocity bipolar outflows launched from inside their cores by means of still unknown mechanisms...
| Autores: | , , , , , , |
|---|---|
| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2024 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/370776 |
| Acesso em linha: | http://hdl.handle.net/10261/370776 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Stars: AGB and post-AGB Stars: individual: CRL 618 Techniques: interferometric Radio continuum: stars Radio lines: stars Stars: jets Stars: kinematics and dynamics Radiative transfer Circumstellar matter Line: identification |
| id |
ES_f1ecfec4b683103c3fa2d3f6516b7ba4 |
|---|---|
| oai_identifier_str |
oai:digital.csic.es:10261/370776 |
| network_acronym_str |
ES |
| network_name_str |
España |
| repository_id_str |
|
| spelling |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMAFonfría, José PabloSánchez Contreras, C.Tafoya, DanielFernández-Ruiz, PatriciaCastro-Carrizo, A.Alcolea, JavierBujarrabal, ValentínStars: AGB and post-AGBStars: individual: CRL 618Techniques: interferometricRadio continuum: starsRadio lines: starsStars: jetsStars: kinematics and dynamicsRadiative transferCircumstellar matterLine: identificationProto- and young planetary nebulae comprise dense circumstellar envelopes made of molecular gas and dust, some of which hide compact ionized cores that host stellar systems with hot objects, and show high-velocity bipolar outflows launched from inside their cores by means of still unknown mechanisms. We present high-angular-resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations (HPBW ≃ 30–50 mas) of CRL 618 at 1.35 mm covering the H30α recombination line as well as ≃150 molecular lines. The ionized core is resolved, showing a size of ≃0.′′8 × 0.′′5 and is elongated along the east–west direction. This region exhibits a remarkable incomplete ring-like structure with two bright spots to the north and south that are separated by ≃0.′′2 and shows deprojected velocity gradients ranging from 0.2 to 0.6 km s−1 au−1. The 1 mm wavelength continuum emission is mostly produced by free–free emission with a small contribution from dust with an average spectral index of 0.28 (Sν ∝ να). The ionized core can roughly be modeled as a tilted hollow cylinder with a denser, incomplete equatorial band lacking its back side. Molecular emission traces the neutral component of the same structures enclosing the ionized matterThis research is part of the I+D+i projects PID2019-105203GB-C21 and PID2019-105203GB-C22 funded by Spanish AEI (MICIU) grant 10.13039/501100011033.Peer reviewedMultidisciplinary Digital Publishing InstituteMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/370776reponame: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/PID2019-105203GB-C21info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105203GB-C22The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.3390/galaxies12050062https://doi.org/10.3390/galaxies12050062Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3707762026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA |
| title |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA |
| spellingShingle |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA Fonfría, José Pablo Stars: AGB and post-AGB Stars: individual: CRL 618 Techniques: interferometric Radio continuum: stars Radio lines: stars Stars: jets Stars: kinematics and dynamics Radiative transfer Circumstellar matter Line: identification |
| title_short |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA |
| title_full |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA |
| title_fullStr |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA |
| title_full_unstemmed |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA |
| title_sort |
Exploring the Ionized Core of the Proto-Planetary Nebula CRL 618 and Its Vicinity with ALMA |
| dc.creator.none.fl_str_mv |
Fonfría, José Pablo Sánchez Contreras, C. Tafoya, Daniel Fernández-Ruiz, Patricia Castro-Carrizo, A. Alcolea, Javier Bujarrabal, Valentín |
| author |
Fonfría, José Pablo |
| author_facet |
Fonfría, José Pablo Sánchez Contreras, C. Tafoya, Daniel Fernández-Ruiz, Patricia Castro-Carrizo, A. Alcolea, Javier Bujarrabal, Valentín |
| author_role |
author |
| author2 |
Sánchez Contreras, C. Tafoya, Daniel Fernández-Ruiz, Patricia Castro-Carrizo, A. Alcolea, Javier Bujarrabal, Valentín |
| author2_role |
author author author author author author |
| dc.contributor.none.fl_str_mv |
Ministerio de Ciencia, Innovación y Universidades (España) Agencia Estatal de Investigación (España) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Stars: AGB and post-AGB Stars: individual: CRL 618 Techniques: interferometric Radio continuum: stars Radio lines: stars Stars: jets Stars: kinematics and dynamics Radiative transfer Circumstellar matter Line: identification |
| topic |
Stars: AGB and post-AGB Stars: individual: CRL 618 Techniques: interferometric Radio continuum: stars Radio lines: stars Stars: jets Stars: kinematics and dynamics Radiative transfer Circumstellar matter Line: identification |
| description |
Proto- and young planetary nebulae comprise dense circumstellar envelopes made of molecular gas and dust, some of which hide compact ionized cores that host stellar systems with hot objects, and show high-velocity bipolar outflows launched from inside their cores by means of still unknown mechanisms. We present high-angular-resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations (HPBW ≃ 30–50 mas) of CRL 618 at 1.35 mm covering the H30α recombination line as well as ≃150 molecular lines. The ionized core is resolved, showing a size of ≃0.′′8 × 0.′′5 and is elongated along the east–west direction. This region exhibits a remarkable incomplete ring-like structure with two bright spots to the north and south that are separated by ≃0.′′2 and shows deprojected velocity gradients ranging from 0.2 to 0.6 km s−1 au−1. The 1 mm wavelength continuum emission is mostly produced by free–free emission with a small contribution from dust with an average spectral index of 0.28 (Sν ∝ να). The ionized core can roughly be modeled as a tilted hollow cylinder with a denser, incomplete equatorial band lacking its back side. Molecular emission traces the neutral component of the same structures enclosing the ionized matter |
| publishDate |
2024 |
| dc.date.none.fl_str_mv |
2024 2024 2024 2024 |
| 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/10261/370776 |
| url |
http://hdl.handle.net/10261/370776 |
| 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/PID2019-105203GB-C21 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105203GB-C22 The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.3390/galaxies12050062 https://doi.org/10.3390/galaxies12050062 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 |
Multidisciplinary Digital Publishing Institute |
| publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute |
| 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 |
|
| _version_ |
1869424229485641728 |
| score |
15,812455 |