H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates

14 pages, 9 figures, 6 tables

Detalhes bibliográficos
Autores: Pereira-Santaella, Miguel, González-Alfonso, Eduardo, García-Bernete, Ismael, Donnan, Fergus R., Santa-María, Miriam G., Goicoechea, Javier R., Lamperti, Isabella, Perna, Michele, Rigopoulou, Dimitra
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:10261/377641
Acesso em linha:http://hdl.handle.net/10261/377641
http://arxiv.org/abs/2408.14545v1
Access Level:Acceso aberto
Palavra-chave:Cosmic rays
Galaxies: active
Galaxies: starburst
Infrared: ISM
ISM: molecules
Astro-ph.GA
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oai_identifier_str oai:digital.csic.es:10261/377641
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
title H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
spellingShingle H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
Pereira-Santaella, Miguel
Cosmic rays
Galaxies: active
Galaxies: starburst
Infrared: ISM
ISM: molecules
Astro-ph.GA
title_short H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
title_full H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
title_fullStr H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
title_full_unstemmed H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
title_sort H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
dc.creator.none.fl_str_mv Pereira-Santaella, Miguel
González-Alfonso, Eduardo
García-Bernete, Ismael
Donnan, Fergus R.
Santa-María, Miriam G.
Goicoechea, Javier R.
Lamperti, Isabella
Perna, Michele
Rigopoulou, Dimitra
author Pereira-Santaella, Miguel
author_facet Pereira-Santaella, Miguel
González-Alfonso, Eduardo
García-Bernete, Ismael
Donnan, Fergus R.
Santa-María, Miriam G.
Goicoechea, Javier R.
Lamperti, Isabella
Perna, Michele
Rigopoulou, Dimitra
author_role author
author2 González-Alfonso, Eduardo
García-Bernete, Ismael
Donnan, Fergus R.
Santa-María, Miriam G.
Goicoechea, Javier R.
Lamperti, Isabella
Perna, Michele
Rigopoulou, Dimitra
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Comunidad de Madrid
Science and Technology Facilities Council (UK)
National Science Foundation (US)
Pereira-Santaella, Miguel [0000-0002-4005-9619]
González-Alfonso, Eduardo [0000-0001-5285-8517]
García-Bernete, Ismael [0000-0002-9627-5281]
Donnan, Fergus R. [0000-0002-6460-3682]
Santa-María, Miriam G. [0000-0002-3941-0360]
Goicoechea, Javier R. [0000-0001-7046-4319]
Lamperti, Isabella [0000-0003-3336-5498]
#NODATA#
Rigopoulou, Dimitra [0000-0001-6854-7545]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Cosmic rays
Galaxies: active
Galaxies: starburst
Infrared: ISM
ISM: molecules
Astro-ph.GA
topic Cosmic rays
Galaxies: active
Galaxies: starburst
Infrared: ISM
ISM: molecules
Astro-ph.GA
description 14 pages, 9 figures, 6 tables
publishDate 2024
dc.date.none.fl_str_mv 2024
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/10261/377641
http://arxiv.org/abs/2408.14545v1
url http://hdl.handle.net/10261/377641
http://arxiv.org/abs/2408.14545v1
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/AEI//RYC2021-033094-I
info:eu-repo/grantAgreement/AEI//CNS2023-145506
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-127718NB-I00
A&A 689, L12 (2024)
https://doi.org/10.1051/0004-6361/202451741
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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)
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spelling H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization ratesPereira-Santaella, MiguelGonzález-Alfonso, EduardoGarcía-Bernete, IsmaelDonnan, Fergus R.Santa-María, Miriam G.Goicoechea, Javier R.Lamperti, IsabellaPerna, MicheleRigopoulou, DimitraCosmic raysGalaxies: activeGalaxies: starburstInfrared: ISMISM: moleculesAstro-ph.GA14 pages, 9 figures, 6 tablesWe study the 3.4-4.4$\mu$m fundamental rovibrational band of H3+, a key tracer of the ionization of the molecular interstellar medium (ISM), in a sample of 12 local (d< 400 Mpc) ultra/luminous infrared galaxies (U/LIRGs) observed with JWST/NIRSpec. The P, Q, and R branches of the band are detected in 13 out of 20 analyzed regions within these U/LIRGs, which increases the number of extragalactic H3+ detections by a factor of 6. For the first time in the ISM, the H3+ band is observed in emission in 3 of these regions. In the remaining 10 regions, the band is seen in absorption. The absorptions are produced toward the 3.4-4.4$\mu$m hot dust continuum rather than toward the stellar continuum, indicating that they likely originate in clouds associated with the dust continuum source. The H3+ band is undetected in Seyfert-like U/LIRGs where the mildly obscured X-ray radiation from the AGN might limit the abundance of this molecule. For the detections, the H3+ abundances, N(H3+)/N_H = (0.5-5.5)x10^-7, imply relatively high ionization rates between 3x10^-16 and >4x10^-15 s^-1, which are likely associated with high-energy cosmic rays. In half of the targets the absorptions are blue-shifted by 50-180 km/s, which are lower than the molecular outflow velocities measured using other tracers such as OH 119$\mu$m or rotational CO lines. This suggests that H3+ traces gas close to the outflow launching sites before it has been fully accelerated. We used nonlocal thermodynamic equilibrium models to investigate the physical conditions of these clouds. In 7 out of 10 objects, the H3+ excitation is consistent with inelastic collisions with H2 in warm translucent molecular clouds (T_kin ~ 250-500 K and n(H2) ~ 10^(2-3) cm^-3). In three objects, dominant infrared pumping excitation is required to explain the absorptions from the (3,0) and (2,1) levels of H3+ detected for the first time in the ISM.MPS acknowledges support under grants RYC2021033094-I and CNS2023-145506 fundedbyMCIN/AEI/10.13039/501100011033 and the European Union NextGenerationEU/PRTR. MPS, EGA, MGSM, and JRG acknowledge funding support under grant PID2023-146667NB-I00 funded by the Spanish MCIN/AEI/10.13039/501100011033. EGA acknowledges grants PID2019-105552RB-C4 and PID2022-137779OB-C41 funded by the Spanish MCIN/AEI/10.13039/501100011033. IGB is supported by the Programa Atracción de Talento Investigador “César Nombela” via grant 2023-T1/TEC29030 funded by the Community of Madrid. FD acknowledges support from STFC through studentship ST/W507726/1. MGSM acknowledges support from the NSF under grant CAREER 2142300. MP acknowledges grant PID2021127718NB-I00 funded by the Spanish Ministry of Science and Innovation/State Agency of Research (MICIN/AEI/ 10.13039/501100011033). DR acknowledges support from STFC through grants ST/S000488/1andST/W000903/1.Peer reviewedEDP SciencesMinisterio de Ciencia e Innovación (España)Comunidad de MadridScience and Technology Facilities Council (UK)National Science Foundation (US)Pereira-Santaella, Miguel [0000-0002-4005-9619]González-Alfonso, Eduardo [0000-0001-5285-8517]García-Bernete, Ismael [0000-0002-9627-5281]Donnan, Fergus R. [0000-0002-6460-3682]Santa-María, Miriam G. [0000-0002-3941-0360]Goicoechea, Javier R. [0000-0001-7046-4319]Lamperti, Isabella [0000-0003-3336-5498]#NODATA#Rigopoulou, Dimitra [0000-0001-6854-7545]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/377641http://arxiv.org/abs/2408.14545v1reponame:DIGITAL.CSIC. 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