Discovery of new globular clusters in the Sagittarius dwarf galaxy

Autores
Minniti, Dante; Ripepi, V.; Fernández Trincado, J. G.; Alonso García, J.; Smith, L. C.; Lucas, P. W.; Gómez, M.; Pullen, J. B.; Garro, E. R.; Vivanco Cádiz, F.; Hempel, M.; Rejkuba, M.; Saito, R. K.; Palma, Tali; Clariá, Juan José; Gregg, M.; Majaess, D.
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Globular clusters (GCs) are witnesses of the past accretion events onto the Milky Way. In particular, the GCs of the Sagittarius (Sgr) dwarf galaxy are important probes of an on-going merger. Aims. Our main goal is to search for new GC members of this dwarf galaxy using the VISTA Variables in the Via Lactea Extended Survey (VVVX) near-infrared database combined with the Gaia Early Data Release 3 (EDR3) optical database. Methods. We investigated all VVVX-enabled discoveries of GC candidates in a region covering about 180 sq. deg. toward the bulge and the Sgr dwarf galaxy. We used multiband point-spread function photometry to obtain deep color-magnitude diagrams (CMDs) and luminosity functions (LFs) for all GC candidates, complemented by accurate Gaia-EDR3 proper motions (PMs) to select Sgr members and variability information to select RR Lyrae which are potential GC members. Results. After applying a strict PM cut to discard foreground bulge and disk stars, the CMDs and LFs for some of the GC candidates exhibit well defined red giant branches and red clump giant star peaks. We selected the best Sgr GCs, estimating their distances, reddenings, and associated RR Lyrae. Conclusions. We discover 12 new Sgr GC members, more than doubling the number of GCs known in this dwarf galaxy. In addition, there are 11 other GC candidates identified that are uncertain, awaiting better data for confirmation.
Fil: Minniti, Dante. Universidad Andrés Bello; Chile. Vatican Observatory; Italia
Fil: Ripepi, V.. Osservatorio Astronomico di Capodimonte; Italia
Fil: Fernández Trincado, J. G.. Universidad de Atacama; Chile. Centre National de la Recherche Scientifique; Francia. Universidad Bernardo O’Higgins; Chile
Fil: Alonso García, J.. Universidad de Antofagasta; Chile. Millennium Institute of Astrophysics; Chile
Fil: Smith, L. C.. University of Cambridge; Reino Unido
Fil: Lucas, P. W.. University of Hertfordshire; Reino Unido
Fil: Gómez, M.. Universidad Andrés Bello; Chile
Fil: Pullen, J. B.. Universidad Andrés Bello; Chile
Fil: Garro, E. R.. Universidad Andrés Bello; Chile
Fil: Vivanco Cádiz, F.. Universidad Andrés Bello; Chile
Fil: Hempel, M.. Universidad Andrés Bello; Chile. Max Planck for Astronomy; Alemania
Fil: Rejkuba, M.. European Southern Observatory Chile; Chile
Fil: Saito, R. K.. Universidade Federal de Santa Catarina; Brasil
Fil: Palma, Tali. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; Argentina
Fil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Gregg, M.. University of California at Davis; Estados Unidos
Fil: Majaess, D.. Mount Saint Vincent University; Canadá. Saint Mary's University. School of Environmental Studies; Canadá
Materia
GALAXIES: DWARF
GALAXIES: STAR CLUSTERS: GENERAL
GLOBULAR CLUSTERS: GENERAL
STARS: VARIABLES: RR LYRAE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/150035
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/150035
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Discovery of new globular clusters in the Sagittarius dwarf galaxyMinniti, DanteRipepi, V.Fernández Trincado, J. G.Alonso García, J.Smith, L. C.Lucas, P. W.Gómez, M.Pullen, J. B.Garro, E. R.Vivanco Cádiz, F.Hempel, M.Rejkuba, M.Saito, R. K.Palma, TaliClariá, Juan JoséGregg, M.Majaess, D.GALAXIES: DWARFGALAXIES: STAR CLUSTERS: GENERALGLOBULAR CLUSTERS: GENERALSTARS: VARIABLES: RR LYRAEhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Globular clusters (GCs) are witnesses of the past accretion events onto the Milky Way. In particular, the GCs of the Sagittarius (Sgr) dwarf galaxy are important probes of an on-going merger. Aims. Our main goal is to search for new GC members of this dwarf galaxy using the VISTA Variables in the Via Lactea Extended Survey (VVVX) near-infrared database combined with the Gaia Early Data Release 3 (EDR3) optical database. Methods. We investigated all VVVX-enabled discoveries of GC candidates in a region covering about 180 sq. deg. toward the bulge and the Sgr dwarf galaxy. We used multiband point-spread function photometry to obtain deep color-magnitude diagrams (CMDs) and luminosity functions (LFs) for all GC candidates, complemented by accurate Gaia-EDR3 proper motions (PMs) to select Sgr members and variability information to select RR Lyrae which are potential GC members. Results. After applying a strict PM cut to discard foreground bulge and disk stars, the CMDs and LFs for some of the GC candidates exhibit well defined red giant branches and red clump giant star peaks. We selected the best Sgr GCs, estimating their distances, reddenings, and associated RR Lyrae. Conclusions. We discover 12 new Sgr GC members, more than doubling the number of GCs known in this dwarf galaxy. In addition, there are 11 other GC candidates identified that are uncertain, awaiting better data for confirmation.Fil: Minniti, Dante. Universidad Andrés Bello; Chile. Vatican Observatory; ItaliaFil: Ripepi, V.. Osservatorio Astronomico di Capodimonte; ItaliaFil: Fernández Trincado, J. G.. Universidad de Atacama; Chile. Centre National de la Recherche Scientifique; Francia. Universidad Bernardo O’Higgins; ChileFil: Alonso García, J.. Universidad de Antofagasta; Chile. Millennium Institute of Astrophysics; ChileFil: Smith, L. C.. University of Cambridge; Reino UnidoFil: Lucas, P. W.. University of Hertfordshire; Reino UnidoFil: Gómez, M.. Universidad Andrés Bello; ChileFil: Pullen, J. B.. Universidad Andrés Bello; ChileFil: Garro, E. R.. Universidad Andrés Bello; ChileFil: Vivanco Cádiz, F.. Universidad Andrés Bello; ChileFil: Hempel, M.. Universidad Andrés Bello; Chile. Max Planck for Astronomy; AlemaniaFil: Rejkuba, M.. European Southern Observatory Chile; ChileFil: Saito, R. K.. Universidade Federal de Santa Catarina; BrasilFil: Palma, Tali. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; ArgentinaFil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Gregg, M.. University of California at Davis; Estados UnidosFil: Majaess, D.. Mount Saint Vincent University; Canadá. Saint Mary's University. School of Environmental Studies; CanadáEDP Sciences2021-03-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/150035Minniti, Dante; Ripepi, V.; Fernández Trincado, J. G.; Alonso García, J.; Smith, L. C.; et al.; Discovery of new globular clusters in the Sagittarius dwarf galaxy; EDP Sciences; Astronomy and Astrophysics; 647; 12-3-2021; 1-120004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2021/03/aa40395-21/aa40395-21.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202140395info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2103.08196info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:00:25Zoai:ri.conicet.gov.ar:11336/150035instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:00:25.317CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Discovery of new globular clusters in the Sagittarius dwarf galaxy
title Discovery of new globular clusters in the Sagittarius dwarf galaxy
spellingShingle Discovery of new globular clusters in the Sagittarius dwarf galaxy
Minniti, Dante
GALAXIES: DWARF
GALAXIES: STAR CLUSTERS: GENERAL
GLOBULAR CLUSTERS: GENERAL
STARS: VARIABLES: RR LYRAE
title_short Discovery of new globular clusters in the Sagittarius dwarf galaxy
title_full Discovery of new globular clusters in the Sagittarius dwarf galaxy
title_fullStr Discovery of new globular clusters in the Sagittarius dwarf galaxy
title_full_unstemmed Discovery of new globular clusters in the Sagittarius dwarf galaxy
title_sort Discovery of new globular clusters in the Sagittarius dwarf galaxy
dc.creator.none.fl_str_mv Minniti, Dante
Ripepi, V.
Fernández Trincado, J. G.
Alonso García, J.
Smith, L. C.
Lucas, P. W.
Gómez, M.
Pullen, J. B.
Garro, E. R.
Vivanco Cádiz, F.
Hempel, M.
Rejkuba, M.
Saito, R. K.
Palma, Tali
Clariá, Juan José
Gregg, M.
Majaess, D.
author Minniti, Dante
author_facet Minniti, Dante
Ripepi, V.
Fernández Trincado, J. G.
Alonso García, J.
Smith, L. C.
Lucas, P. W.
Gómez, M.
Pullen, J. B.
Garro, E. R.
Vivanco Cádiz, F.
Hempel, M.
Rejkuba, M.
Saito, R. K.
Palma, Tali
Clariá, Juan José
Gregg, M.
Majaess, D.
author_role author
author2 Ripepi, V.
Fernández Trincado, J. G.
Alonso García, J.
Smith, L. C.
Lucas, P. W.
Gómez, M.
Pullen, J. B.
Garro, E. R.
Vivanco Cádiz, F.
Hempel, M.
Rejkuba, M.
Saito, R. K.
Palma, Tali
Clariá, Juan José
Gregg, M.
Majaess, D.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv GALAXIES: DWARF
GALAXIES: STAR CLUSTERS: GENERAL
GLOBULAR CLUSTERS: GENERAL
STARS: VARIABLES: RR LYRAE
topic GALAXIES: DWARF
GALAXIES: STAR CLUSTERS: GENERAL
GLOBULAR CLUSTERS: GENERAL
STARS: VARIABLES: RR LYRAE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Globular clusters (GCs) are witnesses of the past accretion events onto the Milky Way. In particular, the GCs of the Sagittarius (Sgr) dwarf galaxy are important probes of an on-going merger. Aims. Our main goal is to search for new GC members of this dwarf galaxy using the VISTA Variables in the Via Lactea Extended Survey (VVVX) near-infrared database combined with the Gaia Early Data Release 3 (EDR3) optical database. Methods. We investigated all VVVX-enabled discoveries of GC candidates in a region covering about 180 sq. deg. toward the bulge and the Sgr dwarf galaxy. We used multiband point-spread function photometry to obtain deep color-magnitude diagrams (CMDs) and luminosity functions (LFs) for all GC candidates, complemented by accurate Gaia-EDR3 proper motions (PMs) to select Sgr members and variability information to select RR Lyrae which are potential GC members. Results. After applying a strict PM cut to discard foreground bulge and disk stars, the CMDs and LFs for some of the GC candidates exhibit well defined red giant branches and red clump giant star peaks. We selected the best Sgr GCs, estimating their distances, reddenings, and associated RR Lyrae. Conclusions. We discover 12 new Sgr GC members, more than doubling the number of GCs known in this dwarf galaxy. In addition, there are 11 other GC candidates identified that are uncertain, awaiting better data for confirmation.
Fil: Minniti, Dante. Universidad Andrés Bello; Chile. Vatican Observatory; Italia
Fil: Ripepi, V.. Osservatorio Astronomico di Capodimonte; Italia
Fil: Fernández Trincado, J. G.. Universidad de Atacama; Chile. Centre National de la Recherche Scientifique; Francia. Universidad Bernardo O’Higgins; Chile
Fil: Alonso García, J.. Universidad de Antofagasta; Chile. Millennium Institute of Astrophysics; Chile
Fil: Smith, L. C.. University of Cambridge; Reino Unido
Fil: Lucas, P. W.. University of Hertfordshire; Reino Unido
Fil: Gómez, M.. Universidad Andrés Bello; Chile
Fil: Pullen, J. B.. Universidad Andrés Bello; Chile
Fil: Garro, E. R.. Universidad Andrés Bello; Chile
Fil: Vivanco Cádiz, F.. Universidad Andrés Bello; Chile
Fil: Hempel, M.. Universidad Andrés Bello; Chile. Max Planck for Astronomy; Alemania
Fil: Rejkuba, M.. European Southern Observatory Chile; Chile
Fil: Saito, R. K.. Universidade Federal de Santa Catarina; Brasil
Fil: Palma, Tali. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; Argentina
Fil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Gregg, M.. University of California at Davis; Estados Unidos
Fil: Majaess, D.. Mount Saint Vincent University; Canadá. Saint Mary's University. School of Environmental Studies; Canadá
description Context. Globular clusters (GCs) are witnesses of the past accretion events onto the Milky Way. In particular, the GCs of the Sagittarius (Sgr) dwarf galaxy are important probes of an on-going merger. Aims. Our main goal is to search for new GC members of this dwarf galaxy using the VISTA Variables in the Via Lactea Extended Survey (VVVX) near-infrared database combined with the Gaia Early Data Release 3 (EDR3) optical database. Methods. We investigated all VVVX-enabled discoveries of GC candidates in a region covering about 180 sq. deg. toward the bulge and the Sgr dwarf galaxy. We used multiband point-spread function photometry to obtain deep color-magnitude diagrams (CMDs) and luminosity functions (LFs) for all GC candidates, complemented by accurate Gaia-EDR3 proper motions (PMs) to select Sgr members and variability information to select RR Lyrae which are potential GC members. Results. After applying a strict PM cut to discard foreground bulge and disk stars, the CMDs and LFs for some of the GC candidates exhibit well defined red giant branches and red clump giant star peaks. We selected the best Sgr GCs, estimating their distances, reddenings, and associated RR Lyrae. Conclusions. We discover 12 new Sgr GC members, more than doubling the number of GCs known in this dwarf galaxy. In addition, there are 11 other GC candidates identified that are uncertain, awaiting better data for confirmation.
publishDate 2021
dc.date.none.fl_str_mv 2021-03-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/150035
Minniti, Dante; Ripepi, V.; Fernández Trincado, J. G.; Alonso García, J.; Smith, L. C.; et al.; Discovery of new globular clusters in the Sagittarius dwarf galaxy; EDP Sciences; Astronomy and Astrophysics; 647; 12-3-2021; 1-12
0004-6361
1432-0746
CONICET Digital
CONICET
url http://hdl.handle.net/11336/150035
identifier_str_mv Minniti, Dante; Ripepi, V.; Fernández Trincado, J. G.; Alonso García, J.; Smith, L. C.; et al.; Discovery of new globular clusters in the Sagittarius dwarf galaxy; EDP Sciences; Astronomy and Astrophysics; 647; 12-3-2021; 1-12
0004-6361
1432-0746
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2021/03/aa40395-21/aa40395-21.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202140395
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2103.08196
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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