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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/150035
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oai:ri.conicet.gov.ar:11336/150035 |
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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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1846781163916492800 |
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12.982451 |