Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027

16 pages, 11 figures, 3 tables

Detalhes bibliográficos
Autores: Huertas-Roldán, Teresa, Alcolea, Javier, García-Hernández, D. Aníbal, Tafoya, Daniel, Fonfría, José Pablo, Díaz-Luis, J. Jairo, Manchado, Arturo, Bujarrabal, Valentín, Barzaga, Ransel, Gómez-Muñoz, Marco A.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/399355
Acesso em linha:http://hdl.handle.net/10261/399355
http://arxiv.org/abs/2506.23256v1
Access Level:acceso abierto
Palavra-chave:Catalogs
Planetary nebulae: individual: IC 418
Planetary nebulae: individual: NGC 7027
Radio lines: stars
Submillimeter: stars
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dc.title.none.fl_str_mv Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027
title Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027
spellingShingle Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027
Huertas-Roldán, Teresa
Catalogs
Planetary nebulae: individual: IC 418
Planetary nebulae: individual: NGC 7027
Radio lines: stars
Submillimeter: stars
title_short Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027
title_full Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027
title_fullStr Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027
title_full_unstemmed Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027
title_sort Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027
dc.creator.none.fl_str_mv Huertas-Roldán, Teresa
Alcolea, Javier
García-Hernández, D. Aníbal
Tafoya, Daniel
Fonfría, José Pablo
Díaz-Luis, J. Jairo
Manchado, Arturo
Bujarrabal, Valentín
Barzaga, Ransel
Gómez-Muñoz, Marco A.
author Huertas-Roldán, Teresa
author_facet Huertas-Roldán, Teresa
Alcolea, Javier
García-Hernández, D. Aníbal
Tafoya, Daniel
Fonfría, José Pablo
Díaz-Luis, J. Jairo
Manchado, Arturo
Bujarrabal, Valentín
Barzaga, Ransel
Gómez-Muñoz, Marco A.
author_role author
author2 Alcolea, Javier
García-Hernández, D. Aníbal
Tafoya, Daniel
Fonfría, José Pablo
Díaz-Luis, J. Jairo
Manchado, Arturo
Bujarrabal, Valentín
Barzaga, Ransel
Gómez-Muñoz, Marco A.
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
European Commission
Huertas-Roldán, Teresa [0000-0002-5523-2568]
Alcolea, Javier [0000-0003-1968-0117]
García-Hernández, D. Aníbal [0000-0002-1693-2721]
#NODATA#
Fonfría, José Pablo [0000-0002-6556-6692]
Díaz-Luis, J. Jairo [0000-0002-6732-8540]
Manchado, Arturo [0000-0002-3011-686X]
Bujarrabal, Valentín [0000-0002-6586-4665]
Barzaga, Ransel [0000-0002-9827-2762]
Gómez-Muñoz, Marco A. [0000-0002-3938-4211]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Catalogs
Planetary nebulae: individual: IC 418
Planetary nebulae: individual: NGC 7027
Radio lines: stars
Submillimeter: stars
topic Catalogs
Planetary nebulae: individual: IC 418
Planetary nebulae: individual: NGC 7027
Radio lines: stars
Submillimeter: stars
description 16 pages, 11 figures, 3 tables
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
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http://purl.org/coar/resource_type/c_6501
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info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/399355
http://arxiv.org/abs/2506.23256v1
url http://hdl.handle.net/10261/399355
http://arxiv.org/abs/2506.23256v1
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dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
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spelling Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027Huertas-Roldán, TeresaAlcolea, JavierGarcía-Hernández, D. AníbalTafoya, DanielFonfría, José PabloDíaz-Luis, J. JairoManchado, ArturoBujarrabal, ValentínBarzaga, RanselGómez-Muñoz, Marco A.CatalogsPlanetary nebulae: individual: IC 418Planetary nebulae: individual: NGC 7027Radio lines: starsSubmillimeter: stars16 pages, 11 figures, 3 tablesThe circumstellar environments of PNe are wonderful chemically rich astrophysical laboratories in which the ionization of atoms and the formation of simple and complex molecules can be studied. The new high-sensitivity receivers open the possibility to carry out deep observations, essential to unveil weak atomic and molecular spectra in the mm range. The main goal of this work is to study the emission lines detected in the spectra of the bright C-rich PNe IC 418 and NGC 7027 and to identify all those emission features associated with radio recombination lines (RRLs) of light elements. We aim to analyze the RRLs detected on each source, and to model the sources and derive their physical parameters. This work allows us to provide the most complete and updated catalog of RRLs in space, carried out at 2, 3 and 7 mm with the IRAM 30m and the Yebes 40m radio telescopes. We compare these observational data sets with synthetic models produced with the radiation transfer code Co3RaL. Our observations reveal the presence of several H and He I RRLs at mm wavelengths in the spectra of IC 418 and NGC 7027 and also of HeIIi RRLs in the spectrum of NGC 7027. Many of these lines had remained undetected until now due to their weakness and the lack of high-sensitivity observations at these frequencies. The data also confirm the absence of molecular emission towards IC 418, above a detection level of ~3 mK [Tmb]. These mm observations represent the most extended RRL line survey of two C-rich PNe carried out so far, with most of the lines never reported before. These extremely complete catalogs evidence the importance of high-sensitivity observations and are expected to be very helpful in the line identification process in mm observations, in particular for still unknown or poorly characterized molecular species existing in the vicinity of ionized environments.THR, DAGH, AMT, and RB acknowledge the support from the State Research Agency (AEI) of the Ministry of Science, Innovation and Universities (MICIU) of the Government of Spain, and the European Regional Development Fund (ERDF), under grants PID2020-115758GB-I00/AEI/10.13039/ 501100011033 and PID2023-147325NB-I00/AEI/10.13039/501100011033. THR acknowledges support from grant PID2020-115758GB-I00/PRE2021-100042 financed by MCIN/AEI/10.13039/501100011033 and the European Social Fund Plus (ESF+). JA, JPF, JJDL, and VB are partially supported by I+D+i projects PID2019-105203GB-C21 and PID2023-146056NB-C21, funded by the Spanish MCIN/AEI/10.13039/501100011033 and EU/ERDF. JPF also acknowledges support from grants PID2023-147545NB-I00 and PID2023-146056NB-C22. MAGM acknowledge to be funded by the European Union (ERC, CET-3PO, 101042610). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them. This work is based on observations carried out under project number 158-21 with the IRAM 30m telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). Based on observations carried out with the Yebes 40 m telescope (22A011). The 40 m radio telescope at Yebes Observatory is operated by the Spanish Geographic Institute (IGN; Ministerio de Transportes y Movilidad Sostenible). This publication is based upon work from COST Action CA21126 – Carbon molecular nanostructures in space (NanoSpace), supported by COST (European Cooperation in Science and Technology)Peer reviewedEDP SciencesAgencia Estatal de Investigación (España)European CommissionHuertas-Roldán, Teresa [0000-0002-5523-2568]Alcolea, Javier [0000-0003-1968-0117]García-Hernández, D. Aníbal [0000-0002-1693-2721]#NODATA#Fonfría, José Pablo [0000-0002-6556-6692]Díaz-Luis, J. Jairo [0000-0002-6732-8540]Manchado, Arturo [0000-0002-3011-686X]Bujarrabal, Valentín [0000-0002-6586-4665]Barzaga, Ransel [0000-0002-9827-2762]Gómez-Muñoz, Marco A. 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