High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2

15 pags., 7 figs., 1 tab.

Detalhes bibliográficos
Autores: Habart, Emilie, Le Gal, Romane, Alvarez,Carlos, Peeters, Els, Berné, Olivier, Wolfire,Mark G., Goicoechea, Javier R., Schirmer, Thiébaut, Bron, Emeric, Röllig, Markus
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:10261/340230
Acesso em linha:http://hdl.handle.net/10261/340230
http://arxiv.org/abs/2206.08245v1
Access Level:acceso abierto
Palavra-chave:Infrared: ISM
ISM: molecules
Photon-dominated region
Astro-ph.GA
Astro-ph.SR
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oai_identifier_str oai:digital.csic.es:10261/340230
network_acronym_str ES
network_name_str España
repository_id_str
spelling High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2Habart, EmilieLe Gal, RomaneAlvarez,CarlosPeeters, ElsBerné, OlivierWolfire,Mark G.Goicoechea, Javier R.Schirmer, ThiébautBron, EmericRöllig, MarkusInfrared: ISMISM: moleculesPhoton-dominated regionAstro-ph.GAAstro-ph.SR15 pags., 7 figs., 1 tab.Nearby Photo-Dissociation Regions (PDRs), where the gas and dust are heated by the far UV-irradiation emitted from stars, are ideal templates to study the main stellar feedback processes. With this study we aim to probe the detailed structures at the interfaces between ionized, atomic, and molecular gas in the Orion Bar. This nearby prototypical strongly irradiated PDR will be among the first targets of the James Webb Space Telescope (JWST) within the framework of the PDRs4All Early Release Science program. We employed the sub-arcsec resolution accessible with Keck-II NIRC2 and its adaptive optics system to obtain the most detailed and complete images, ever performed, of the vibrationally excited line H$_2$ 1-0 S(1) at 2.12~$\mu$m, tracing the dissociation front, and the [FeII] and Br$\gamma$ lines, at 1.64 and 2.16~$\mu$m respectively, tracing the ionization front. We obtained narrow-band filter images in these key gas line diagnostic over $\sim 40''$ at spatial scales of $\sim$0.1$''$ ($\sim$0.0002~pc or $\sim$40~AU at 414~pc). The Keck/NIRC2 observations spatially resolve a plethora of irradiated sub-structures such as ridges, filaments, globules and proplyds. A remarkable spatial coincidence between the H$_2$ 1-0 S(1) vibrational and HCO$^+$ J=4-3 rotational emission previously obtained with ALMA is observed. This likely indicates the intimate link between these two molecular species and highlights that in high pressure PDR the H/H$_2$ and C$^+$/C/CO transitions zones come closer as compared to a typical layered structure of a constant density PDR. This is in agreement with several previous studies that claimed that the Orion Bar edge is composed of very small, dense, highly irradiated PDRs at high thermal pressure immersed in a more diffuse environment.The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This research has made use of the Keck Observatory Archive (KOA), which is operated by the W.M. Keck Observatory and the NASA Exoplanet Science Institute (NExScI), under contract with the National Aeronautics and Space Administration. Mark G. Wolfire acknowledges partial support from a NASA-Keck data analysis grant (contract 1653861). Javier R. Goicoechea thanks the Spanish MCIU for funding support under grant PID2019-106110GB-I00.Peer reviewedEDP SciencesW. M. Keck FoundationCalifornia Institute of TechnologyUniversity of CaliforniaNASAMinisterio de Ciencia, Innovación y Universidades (España)Habart, Emilie [0000-0001-9136-8043]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/340230http://arxiv.org/abs/2206.08245v1reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-106110GB-I00A&A 673, A149 (2023)https://doi.org/10.1051/0004-6361/202244034Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3402302026-05-22T06:33:51Z
dc.title.none.fl_str_mv High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2
title High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2
spellingShingle High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2
Habart, Emilie
Infrared: ISM
ISM: molecules
Photon-dominated region
Astro-ph.GA
Astro-ph.SR
title_short High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2
title_full High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2
title_fullStr High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2
title_full_unstemmed High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2
title_sort High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2
dc.creator.none.fl_str_mv Habart, Emilie
Le Gal, Romane
Alvarez,Carlos
Peeters, Els
Berné, Olivier
Wolfire,Mark G.
Goicoechea, Javier R.
Schirmer, Thiébaut
Bron, Emeric
Röllig, Markus
author Habart, Emilie
author_facet Habart, Emilie
Le Gal, Romane
Alvarez,Carlos
Peeters, Els
Berné, Olivier
Wolfire,Mark G.
Goicoechea, Javier R.
Schirmer, Thiébaut
Bron, Emeric
Röllig, Markus
author_role author
author2 Le Gal, Romane
Alvarez,Carlos
Peeters, Els
Berné, Olivier
Wolfire,Mark G.
Goicoechea, Javier R.
Schirmer, Thiébaut
Bron, Emeric
Röllig, Markus
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv W. M. Keck Foundation
California Institute of Technology
University of California
NASA
Ministerio de Ciencia, Innovación y Universidades (España)
Habart, Emilie [0000-0001-9136-8043]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Infrared: ISM
ISM: molecules
Photon-dominated region
Astro-ph.GA
Astro-ph.SR
topic Infrared: ISM
ISM: molecules
Photon-dominated region
Astro-ph.GA
Astro-ph.SR
description 15 pags., 7 figs., 1 tab.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
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/10261/340230
http://arxiv.org/abs/2206.08245v1
url http://hdl.handle.net/10261/340230
http://arxiv.org/abs/2206.08245v1
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-106110GB-I00
A&A 673, A149 (2023)
https://doi.org/10.1051/0004-6361/202244034
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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 15,81155

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