Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822

J. M. Howell et al. -- Tables 2, 3, B.1, B.2, B.3 and B.4 are available at the CDS via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A185. -- Euclid Consortium

Detalhes bibliográficos
Autores: Howell, Jess, Courbin, Frédéric, Serrano, Santiago
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:10261/424986
Acesso em linha:http://hdl.handle.net/10261/424986
Access Level:acceso abierto
Palavra-chave:Galaxies: dwarf
Galaxies: individual: NGC 6822
Galaxies: individual: IC 10
Local Group galaxies: star clusters: general
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oai_identifier_str oai:digital.csic.es:10261/424986
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
title Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
spellingShingle Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
Howell, Jess
Galaxies: dwarf
Galaxies: individual: NGC 6822
Galaxies: individual: IC 10
Local Group galaxies: star clusters: general
title_short Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
title_full Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
title_fullStr Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
title_full_unstemmed Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
title_sort Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
dc.creator.none.fl_str_mv Howell, Jess
Courbin, Frédéric
Serrano, Santiago
author Howell, Jess
author_facet Howell, Jess
Courbin, Frédéric
Serrano, Santiago
author_role author
author2 Courbin, Frédéric
Serrano, Santiago
author2_role author
author
dc.contributor.none.fl_str_mv European Space Agency
Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
European Commission
Howell, Jess [0009-0002-2242-6515]
Courbin, Frédéric [0000-0003-0758-6510]
Serrano, Santiago [0000-0002-0211-2861]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxies: dwarf
Galaxies: individual: NGC 6822
Galaxies: individual: IC 10
Local Group galaxies: star clusters: general
topic Galaxies: dwarf
Galaxies: individual: NGC 6822
Galaxies: individual: IC 10
Local Group galaxies: star clusters: general
description J. M. Howell et al. -- Tables 2, 3, B.1, B.2, B.3 and B.4 are available at the CDS via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A185. -- Euclid Consortium
publishDate 2026
dc.date.none.fl_str_mv 2026
2026
2026
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/10261/424986
url http://hdl.handle.net/10261/424986
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Howell, J.M.; Ferguson, A.M.N.; Larsen, S. et..al.; 2026; Euclid. ERO. IC 10 and NGC 6822 : J/A+A/706/A185 [Dataset]; Centre de Donnees astronomique de Strasbourg (CDS); https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A185
https://doi.org/10.1051/0004-6361/202556953
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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
_version_ 1869420454797639680
spelling Euclid: Early Release Observations the star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822Howell, JessCourbin, FrédéricSerrano, SantiagoGalaxies: dwarfGalaxies: individual: NGC 6822Galaxies: individual: IC 10Local Group galaxies: star clusters: generalJ. M. Howell et al. -- Tables 2, 3, B.1, B.2, B.3 and B.4 are available at the CDS via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A185. -- Euclid ConsortiumStar clusters are valuable indicators of galaxy evolution, offering insights into the buildup of stellar populations across cosmic time. Understanding the intrinsic star cluster populations of dwarf galaxies is particularly important given these systems’ role in the hierarchical growth of larger systems. We use data from Euclid’s Early Release Observation programme to study star clusters in two star-forming dwarf irregular galaxies in the Local Group, NGC 6822 and IC 10 [M⋆ ~ (1–4) × 108 M⊙]. With Euclid, star clusters are resolved into individual stars across the main bodies and haloes of both galaxies. Through visual inspection of the IE images, we uncover 30 new star cluster candidates in NGC 6822 and 16 in IC 10, ranging from compact to diffuse extended clusters. We compile and re-evaluate previously identified literature candidates, resulting in final combined catalogues of 52 (NGC 6822) and 71 (IC 10) cluster candidates with confidence-based classifications. We present homogeneous photometry in IE, YE, JE, and HE, and in archival UBVRI data, alongside size measurements and properties derived from the spectral energy distribution fitting code BAGPIPES. Through synthetic cluster injection, we conclude our sample is ~50% complete to M ≲ 103 M⊙ for ages ≲100 Myr, and to M ≲ 2 × 104 M⊙ for ages of ~10 Gyr. We find that IC 10 has more young clusters than NGC 6822, and its young clusters extend to higher masses, consistent with its starburst nature. We find several old massive (≳105 M⊙) clusters in both dwarfs, including an exceptional cluster in NGC 6822’s outskirts with a mass of 1.3 × 106 M⊙, nearly twice as massive as any other old cluster in either galaxy. In NGC 6822, we also identify a previously undetected, old, and extended cluster (Rh = 12.4 ± 0.11 pc). Using well-defined criteria, we identify 11 candidate GCs in NGC 6822 and nine in IC 10. Both galaxies have high specific frequencies (SN) for their luminosities but remain consistent with the known GC scaling relationships in the low-luminosity regime.JMH acknowledges funding from the Bell Burnell Graduate Scholarship Fund (BB0015). AMNF is supported by UK Research and Innovation (UKRI) under the UK government’s Horizon Europe funding guarantee [grant number EP/Z534353/1] and by the Science and Technology Facilities Council [grant number ST/Y001281/1]. We thank Philip Massey for helpful clarifications on the LGGS data, and Adam Carnall for sharing insights and discussion on SED fitting with BAGPIPES. The Euclid Consortium acknowledges the European Space Agency and a number of agencies and institutes that have supported the development of Euclid, in particular the Agenzia Spaziale Italiana, the Austrian Forschungsförderungsgesellschaft funded through BMK, the Belgian Science Policy, the Canadian Euclid Consortium, the Deutsches Zentrum für Luft1245 und Raumfahrt, the DTU Space and the Niels Bohr Institute in Denmark, the French Centre National d’Etudes Spatiales, the Fundação para a Ciência e a Tecnologia, the Hungarian Academy of Sciences, the Ministerio de Ciencia, Innovación y Universidades, the National Aeronautics and Space Administration, the National Astronomical Observatory of Japan, the Netherlandse On1250 derzoekschool Voor Astronomie, the Norwegian Space Agency, the Research Council of Finland, the Romanian Space Agency, the State Secretariat for Education, Research, and Innovation (SERI) at the Swiss Space Office (SSO), and the United Kingdom Space Agency. A complete and detailed list is available on the Euclid web site (www.euclid-ec.org). This work has made use of the Early Release Observations (ERO) data from the Euclid mission of the European Space Agency (ESA), 2024, https://doi.org/10.57780/esa-qmocze3, and the Hα and UBVRI images obtained as part of the Survey of Local Group Galaxies Currently Forming Stars. This research made use of the following software, packages and python libraries: SVO Filter Profile Service “Carlos Rodrigo”, TOPCAT (https://www.star.bristol.ac.uk/mbt/topcat), SAOImage DS9 (https://ds9.si.edu), NUMPY (Harris et al. 2020), SCIPY (Virtanen et al. 2020), ASTROPY (Astropy Collaboration 2022).Peer reviewedEDP SciencesEuropean Space AgencyMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)European CommissionHowell, Jess [0009-0002-2242-6515]Courbin, Frédéric [0000-0003-0758-6510]Serrano, Santiago [0000-0002-0211-2861]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262026info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/424986reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésHowell, J.M.; Ferguson, A.M.N.; Larsen, S. et..al.; 2026; Euclid. ERO. IC 10 and NGC 6822 : J/A+A/706/A185 [Dataset]; Centre de Donnees astronomique de Strasbourg (CDS); https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A185https://doi.org/10.1051/0004-6361/202556953Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4249862026-05-22T06:33:51Z
score 15,812429

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