The CON-quasar stage of IRAS 07251−0248 E

16 pages, 11 figures, 3 tables

Detalhes bibliográficos
Autores: González-Alfonso, E., Pereira-Santaella, Miguel, García-Bernete, I., Fischer, J., Speranza, G.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2026
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/424344
Acesso em linha:http://hdl.handle.net/10261/424344
Access Level:acceso abierto
Palavra-chave:ISM: general
ISM: jets and outflows
galaxies: active
ISM: individual objects: IRAS 07251-0248 E
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dc.title.none.fl_str_mv The CON-quasar stage of IRAS 07251−0248 E
title The CON-quasar stage of IRAS 07251−0248 E
spellingShingle The CON-quasar stage of IRAS 07251−0248 E
González-Alfonso, E.
ISM: general
ISM: jets and outflows
galaxies: active
ISM: individual objects: IRAS 07251-0248 E
title_short The CON-quasar stage of IRAS 07251−0248 E
title_full The CON-quasar stage of IRAS 07251−0248 E
title_fullStr The CON-quasar stage of IRAS 07251−0248 E
title_full_unstemmed The CON-quasar stage of IRAS 07251−0248 E
title_sort The CON-quasar stage of IRAS 07251−0248 E
dc.creator.none.fl_str_mv González-Alfonso, E.
Pereira-Santaella, Miguel
García-Bernete, I.
Fischer, J.
Speranza, G.
author González-Alfonso, E.
author_facet González-Alfonso, E.
Pereira-Santaella, Miguel
García-Bernete, I.
Fischer, J.
Speranza, G.
author_role author
author2 Pereira-Santaella, Miguel
García-Bernete, I.
Fischer, J.
Speranza, G.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Comunidad de Madrid
NASA
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv ISM: general
ISM: jets and outflows
galaxies: active
ISM: individual objects: IRAS 07251-0248 E
topic ISM: general
ISM: jets and outflows
galaxies: active
ISM: individual objects: IRAS 07251-0248 E
description 16 pages, 11 figures, 3 tables
publishDate 2026
dc.date.none.fl_str_mv 2026
2026
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
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Publisher's version
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/424344
url http://hdl.handle.net/10261/424344
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http://dx.doi.org/10.1051/0004-6361/202556762
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dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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spelling The CON-quasar stage of IRAS 07251−0248 EGonzález-Alfonso, E.Pereira-Santaella, MiguelGarcía-Bernete, I.Fischer, J.Speranza, G.ISM: generalISM: jets and outflowsgalaxies: activeISM: individual objects: IRAS 07251-0248 E16 pages, 11 figures, 3 tablesALMA continuum measurements of the local ultra-luminous galaxy IRAS 07251−0248 E at 667 μm reveal an extremely compact (R ≲ 27 pc) and bright (T ≳ 200 K) nucleus with an absorbing foreground envelope and a surrounding (R ∼ 75 pc) disk or torus seen nearly face-on. The bright and unresolved nuclear emission implies large optical depths (τ ≳ 0.5, corresponding to N ≳ 10 cm) of hot dust at ≳500 K. In addition, JWST observations of the source show strong mid-infrared (mid-IR) absorption in the ro-vibrational bands of HO ν = 1 − 0 (5 − 7 μm) and of other species including CO, HCN, CH, CH, and CO, and Herschel/PACS observations exhibit strong and saturated absorption due to OH, HO, CH, and CH. We propose a model in which the unresolved ALMA submillimeter and JWST mid-IR continua trace the same nuclear source, the former penetrating deep into the nucleus and the latter probing the nuclear photosphere. The continuum model, which includes trapping of photons (the “greenhouse” effect), indicates that the nuclear (R ≈ 13 pc) luminosity and luminosity surface density are ∼10 L and Σ ≈ 5 × 10 L pc, arising from an active galactic nucleus (AGN) so buried that high-ionization lines are completely obscured. The observed mid-IR gas-phase molecular bands probe outflowing gas with velocities of ∼160 km s and are reproduced with the predicted T profile, while the far-IR molecular absorption lines are generated in the surrounding thick disk or torus with τ ∼ 10. We conclude that IRAS 07251−0248 harbors a compact obscured nucleus (CON) that hides an AGN currently emitting at quasar luminosity. While the observed outflow could be driven by radiation pressure, we favor the scenario of a (partially) energy-conserving hot bubble caught in a very early phase of the expulsion of the highly concentrated gas at the galactic nucleus.EG-A thanks the Spanish MICINN for support under projects PID2022-137779OB-C41 and PID2023-146667NB-I00. MPS acknowledges support under grants RYC2021-033094-I, CNS2023-145506 and PID2023146667NB-I00 funded by MCIN/AEI/10.13039/501100011033 and the European Union NextGenerationEU/PRTR. IGB is supported by the Programa Atracción de Talento Investigador “César Nombela” via grant 2023-T1/TEC-29030 funded by the Community of Madrid. This work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST; and from the European JWST archive (eJWST) operated by the ESAC Science Data Centre (ESDC) of the European Space Agency. These observations are associated with program #3368.This paper makes use of the following ALMA data: ADS/JAO.ALMA#2023.1.00942.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) andNSCandASIAA(Taiwan)andKASI(RepublicofKorea),incooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ.The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.EDP SciencesAgencia Estatal de Investigación (España)Comunidad de MadridNASAConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2026202620262026info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/424344reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-137779OB-C41info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-146667NB-I00info:eu-repo/grantAgreement/AEI//RYC2021-033094-Iinfo:eu-repo/grantAgreement/AEI//CNS2023-145506info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-146667NB-I00http://dx.doi.org/10.1051/0004-6361/202556762Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4243442026-05-22T06:33:51Z
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