The molecular environment of the pillar-like features in the H ii region G46.5–0.2

Autores
Paron, Sergio Ariel; Celis Peña, Mariela Fernanda; Ortega, Martin Eduardo; Fariña, Cecilia Silvia; Petriella, Alberto; Rubio, M.; Ashley, R. P.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
At the interface of HII regions and molecular gas, peculiar structuresappear, some of them with pillar-like shapes. Understanding their originis important for characterizing triggered star formation and the impactof massive stars on the interstellar medium. In order to study themolecular environment and influence of radiation on two pillar-likefeatures related to the H ii region G46.5-0.2, we performed molecularline observations with the Atacama Submillimeter Telescope Experimentand spectroscopic optical observations with the Isaac Newton Telescope.From the optical observations, we identified the star that is excitingthe H ii region as spectral type O4-6. The molecular data allowed us tostudy the structure of the pillars and an HCO+ cloud lyingbetween them. In this HCO+ cloud, which has no well-defined12CO counterpart, we found direct evidence of star formation:two molecular outflows and two associated near-IR nebulosities. Theoutflow axis orientation is perpendicular to the direction of theradiation flow from the HII region. Several Class I sources are alsoembedded in this HCO+ cloud, showing that it is usual thatyoung stellar objects (YSOs) form large associations occupying a cavitybounded by pillars. On the other hand, it was confirmed that theradiation-driven implosion (RDI) process is not occurring in one of thepillar tips.
Fil: Paron, Sergio Ariel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Celis Peña, Mariela Fernanda. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Ortega, Martin Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Fariña, Cecilia Silvia. Isaac Newton Group Of Telescopes, Las Palmas, Iac; España
Fil: Petriella, Alberto. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Rubio, M.. Departamento de Astronomía, Universidad de Chile; Chile
Fil: Ashley, R. P.. University Of Warwick; Reino Unido
Materia
(ISM:) HII REGIONS
(ISM): PHOTODISSOCIATION REGION (PDR)
ISM: JETS AND OUTFLOWS
STARS: FORMATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/45865
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/45865
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The molecular environment of the pillar-like features in the H ii region G46.5–0.2Paron, Sergio ArielCelis Peña, Mariela FernandaOrtega, Martin EduardoFariña, Cecilia SilviaPetriella, AlbertoRubio, M.Ashley, R. P.(ISM:) HII REGIONS(ISM): PHOTODISSOCIATION REGION (PDR)ISM: JETS AND OUTFLOWSSTARS: FORMATIONAt the interface of HII regions and molecular gas, peculiar structuresappear, some of them with pillar-like shapes. Understanding their originis important for characterizing triggered star formation and the impactof massive stars on the interstellar medium. In order to study themolecular environment and influence of radiation on two pillar-likefeatures related to the H ii region G46.5-0.2, we performed molecularline observations with the Atacama Submillimeter Telescope Experimentand spectroscopic optical observations with the Isaac Newton Telescope.From the optical observations, we identified the star that is excitingthe H ii region as spectral type O4-6. The molecular data allowed us tostudy the structure of the pillars and an HCO<sup>+</sup> cloud lyingbetween them. In this HCO<sup>+</sup> cloud, which has no well-defined<sup>12</sup>CO counterpart, we found direct evidence of star formation:two molecular outflows and two associated near-IR nebulosities. Theoutflow axis orientation is perpendicular to the direction of theradiation flow from the HII region. Several Class I sources are alsoembedded in this HCO<sup>+</sup> cloud, showing that it is usual thatyoung stellar objects (YSOs) form large associations occupying a cavitybounded by pillars. On the other hand, it was confirmed that theradiation-driven implosion (RDI) process is not occurring in one of thepillar tips.Fil: Paron, Sergio Ariel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Celis Peña, Mariela Fernanda. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Ortega, Martin Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Fariña, Cecilia Silvia. Isaac Newton Group Of Telescopes, Las Palmas, Iac; EspañaFil: Petriella, Alberto. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Rubio, M.. Departamento de Astronomía, Universidad de Chile; ChileFil: Ashley, R. P.. University Of Warwick; Reino UnidoWiley Blackwell Publishing, Inc2017-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/45865Paron, Sergio Ariel; Celis Peña, Mariela Fernanda; Ortega, Martin Eduardo; Fariña, Cecilia Silvia; Petriella, Alberto; et al.; The molecular environment of the pillar-like features in the H ii region G46.5–0.2; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 470; 4; 10-2017; 4662-46700035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx1486info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stx1486info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:42:57Zoai:ri.conicet.gov.ar:11336/45865instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:42:57.665CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The molecular environment of the pillar-like features in the H ii region G46.5–0.2
title The molecular environment of the pillar-like features in the H ii region G46.5–0.2
spellingShingle The molecular environment of the pillar-like features in the H ii region G46.5–0.2
Paron, Sergio Ariel
(ISM:) HII REGIONS
(ISM): PHOTODISSOCIATION REGION (PDR)
ISM: JETS AND OUTFLOWS
STARS: FORMATION
title_short The molecular environment of the pillar-like features in the H ii region G46.5–0.2
title_full The molecular environment of the pillar-like features in the H ii region G46.5–0.2
title_fullStr The molecular environment of the pillar-like features in the H ii region G46.5–0.2
title_full_unstemmed The molecular environment of the pillar-like features in the H ii region G46.5–0.2
title_sort The molecular environment of the pillar-like features in the H ii region G46.5–0.2
dc.creator.none.fl_str_mv Paron, Sergio Ariel
Celis Peña, Mariela Fernanda
Ortega, Martin Eduardo
Fariña, Cecilia Silvia
Petriella, Alberto
Rubio, M.
Ashley, R. P.
author Paron, Sergio Ariel
author_facet Paron, Sergio Ariel
Celis Peña, Mariela Fernanda
Ortega, Martin Eduardo
Fariña, Cecilia Silvia
Petriella, Alberto
Rubio, M.
Ashley, R. P.
author_role author
author2 Celis Peña, Mariela Fernanda
Ortega, Martin Eduardo
Fariña, Cecilia Silvia
Petriella, Alberto
Rubio, M.
Ashley, R. P.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv (ISM:) HII REGIONS
(ISM): PHOTODISSOCIATION REGION (PDR)
ISM: JETS AND OUTFLOWS
STARS: FORMATION
topic (ISM:) HII REGIONS
(ISM): PHOTODISSOCIATION REGION (PDR)
ISM: JETS AND OUTFLOWS
STARS: FORMATION
dc.description.none.fl_txt_mv At the interface of HII regions and molecular gas, peculiar structuresappear, some of them with pillar-like shapes. Understanding their originis important for characterizing triggered star formation and the impactof massive stars on the interstellar medium. In order to study themolecular environment and influence of radiation on two pillar-likefeatures related to the H ii region G46.5-0.2, we performed molecularline observations with the Atacama Submillimeter Telescope Experimentand spectroscopic optical observations with the Isaac Newton Telescope.From the optical observations, we identified the star that is excitingthe H ii region as spectral type O4-6. The molecular data allowed us tostudy the structure of the pillars and an HCO<sup>+</sup> cloud lyingbetween them. In this HCO<sup>+</sup> cloud, which has no well-defined<sup>12</sup>CO counterpart, we found direct evidence of star formation:two molecular outflows and two associated near-IR nebulosities. Theoutflow axis orientation is perpendicular to the direction of theradiation flow from the HII region. Several Class I sources are alsoembedded in this HCO<sup>+</sup> cloud, showing that it is usual thatyoung stellar objects (YSOs) form large associations occupying a cavitybounded by pillars. On the other hand, it was confirmed that theradiation-driven implosion (RDI) process is not occurring in one of thepillar tips.
Fil: Paron, Sergio Ariel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Celis Peña, Mariela Fernanda. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Ortega, Martin Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Fariña, Cecilia Silvia. Isaac Newton Group Of Telescopes, Las Palmas, Iac; España
Fil: Petriella, Alberto. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Rubio, M.. Departamento de Astronomía, Universidad de Chile; Chile
Fil: Ashley, R. P.. University Of Warwick; Reino Unido
description At the interface of HII regions and molecular gas, peculiar structuresappear, some of them with pillar-like shapes. Understanding their originis important for characterizing triggered star formation and the impactof massive stars on the interstellar medium. In order to study themolecular environment and influence of radiation on two pillar-likefeatures related to the H ii region G46.5-0.2, we performed molecularline observations with the Atacama Submillimeter Telescope Experimentand spectroscopic optical observations with the Isaac Newton Telescope.From the optical observations, we identified the star that is excitingthe H ii region as spectral type O4-6. The molecular data allowed us tostudy the structure of the pillars and an HCO<sup>+</sup> cloud lyingbetween them. In this HCO<sup>+</sup> cloud, which has no well-defined<sup>12</sup>CO counterpart, we found direct evidence of star formation:two molecular outflows and two associated near-IR nebulosities. Theoutflow axis orientation is perpendicular to the direction of theradiation flow from the HII region. Several Class I sources are alsoembedded in this HCO<sup>+</sup> cloud, showing that it is usual thatyoung stellar objects (YSOs) form large associations occupying a cavitybounded by pillars. On the other hand, it was confirmed that theradiation-driven implosion (RDI) process is not occurring in one of thepillar tips.
publishDate 2017
dc.date.none.fl_str_mv 2017-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/45865
Paron, Sergio Ariel; Celis Peña, Mariela Fernanda; Ortega, Martin Eduardo; Fariña, Cecilia Silvia; Petriella, Alberto; et al.; The molecular environment of the pillar-like features in the H ii region G46.5–0.2; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 470; 4; 10-2017; 4662-4670
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/45865
identifier_str_mv Paron, Sergio Ariel; Celis Peña, Mariela Fernanda; Ortega, Martin Eduardo; Fariña, Cecilia Silvia; Petriella, Alberto; et al.; The molecular environment of the pillar-like features in the H ii region G46.5–0.2; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 470; 4; 10-2017; 4662-4670
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx1486
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stx1486
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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