The paucity of globular clusters around the field elliptical NGC 7507

Autores
Caso, Juan Pablo; Richtler, Tom; Bassino, Lilia Patricia; Salinas, R.; Lane, R. R.; Romanowsky, A.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. There is strong evidence that globular cluster systems (GCSs) of massive galaxies are largely assembled by infall/accretion processes. Therefore, we expect the GCSs of isolated elliptical galaxies to be poor. Although not completely isolated, NGC 7507 is a massive field elliptical galaxy with an apparently very low dark matter content. Aims. We determine the richness, the colour distribution, and the structural properties of the GCS of NGC 7507. Methods. We performed wide-field Washington photometry with data obtained with the MOSAIC II camera at the 4m-Blanco telescope (CTIO, Chile). Results. The GCS is very poor with SN ≈ 0.6. We identify three subpopulations with peaks at (C − T1) colours of 1.21, 1.42, and 1.72. The bluest population may represent the old, metal-poor component. This interpretation is supported by its shallow density profile. The red population is more concentrated, resembling the galaxy light. The intermediate-colour population is strongly peaked in colour, and we interpret this population as the signature of a starburst whose age depends on the metallicity, but should be quite old, since no signatures of a merger are identifiable. In addition, we find a main sequence in the stellar foreground population, which we attribute to the Sagittarius dwarf tidal stream. Conclusions. The extrordinarily poor GCS of NGC 7507, a massive elliptical galaxy, is an illustration of how important the environmental conditions are for producing rich GCSs.
Fil: Caso, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Richtler, Tom . Universidad de Concepción; Chile
Fil: Bassino, Lilia Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Salinas, R.. University of Turku. Finnish Centre for Astronomy with ESO ; Finlandia
Fil: Lane, R. R.. Universidad de Concepción; Chile
Fil: Romanowsky, A. . University of California Observatories; Estados Unidos. San José State University; Estados Unidos
Materia
NGC 7507 (galaxia)
Eliptical galaxies
Lenticulars galaxies
Clusters of galaxies
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:11336/10734
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The paucity of globular clusters around the field elliptical NGC 7507Caso, Juan PabloRichtler, Tom Bassino, Lilia PatriciaSalinas, R.Lane, R. R.Romanowsky, A. NGC 7507 (galaxia)Eliptical galaxiesLenticulars galaxiesClusters of galaxieshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. There is strong evidence that globular cluster systems (GCSs) of massive galaxies are largely assembled by infall/accretion processes. Therefore, we expect the GCSs of isolated elliptical galaxies to be poor. Although not completely isolated, NGC 7507 is a massive field elliptical galaxy with an apparently very low dark matter content. Aims. We determine the richness, the colour distribution, and the structural properties of the GCS of NGC 7507. Methods. We performed wide-field Washington photometry with data obtained with the MOSAIC II camera at the 4m-Blanco telescope (CTIO, Chile). Results. The GCS is very poor with SN ≈ 0.6. We identify three subpopulations with peaks at (C − T1) colours of 1.21, 1.42, and 1.72. The bluest population may represent the old, metal-poor component. This interpretation is supported by its shallow density profile. The red population is more concentrated, resembling the galaxy light. The intermediate-colour population is strongly peaked in colour, and we interpret this population as the signature of a starburst whose age depends on the metallicity, but should be quite old, since no signatures of a merger are identifiable. In addition, we find a main sequence in the stellar foreground population, which we attribute to the Sagittarius dwarf tidal stream. Conclusions. The extrordinarily poor GCS of NGC 7507, a massive elliptical galaxy, is an illustration of how important the environmental conditions are for producing rich GCSs.Fil: Caso, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Richtler, Tom . Universidad de Concepción; ChileFil: Bassino, Lilia Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Salinas, R.. University of Turku. Finnish Centre for Astronomy with ESO ; FinlandiaFil: Lane, R. R.. Universidad de Concepción; ChileFil: Romanowsky, A. . University of California Observatories; Estados Unidos. San José State University; Estados UnidosEdp Sciences2013-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/10734Caso, Juan Pablo; Richtler, Tom ; Bassino, Lilia Patricia; Salinas, R.; Lane, R. R.; et al.; The paucity of globular clusters around the field elliptical NGC 7507; Edp Sciences; Astronomy And Astrophysics; 555; 7-2013; 56-640004-6361enginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201321032info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2013/07/aa21032-13/aa21032-13.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:49:45Zoai:ri.conicet.gov.ar:11336/10734instacron: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:34982025-09-03 09:49:45.334CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The paucity of globular clusters around the field elliptical NGC 7507
title The paucity of globular clusters around the field elliptical NGC 7507
spellingShingle The paucity of globular clusters around the field elliptical NGC 7507
Caso, Juan Pablo
NGC 7507 (galaxia)
Eliptical galaxies
Lenticulars galaxies
Clusters of galaxies
title_short The paucity of globular clusters around the field elliptical NGC 7507
title_full The paucity of globular clusters around the field elliptical NGC 7507
title_fullStr The paucity of globular clusters around the field elliptical NGC 7507
title_full_unstemmed The paucity of globular clusters around the field elliptical NGC 7507
title_sort The paucity of globular clusters around the field elliptical NGC 7507
dc.creator.none.fl_str_mv Caso, Juan Pablo
Richtler, Tom
Bassino, Lilia Patricia
Salinas, R.
Lane, R. R.
Romanowsky, A.
author Caso, Juan Pablo
author_facet Caso, Juan Pablo
Richtler, Tom
Bassino, Lilia Patricia
Salinas, R.
Lane, R. R.
Romanowsky, A.
author_role author
author2 Richtler, Tom
Bassino, Lilia Patricia
Salinas, R.
Lane, R. R.
Romanowsky, A.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv NGC 7507 (galaxia)
Eliptical galaxies
Lenticulars galaxies
Clusters of galaxies
topic NGC 7507 (galaxia)
Eliptical galaxies
Lenticulars galaxies
Clusters of galaxies
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. There is strong evidence that globular cluster systems (GCSs) of massive galaxies are largely assembled by infall/accretion processes. Therefore, we expect the GCSs of isolated elliptical galaxies to be poor. Although not completely isolated, NGC 7507 is a massive field elliptical galaxy with an apparently very low dark matter content. Aims. We determine the richness, the colour distribution, and the structural properties of the GCS of NGC 7507. Methods. We performed wide-field Washington photometry with data obtained with the MOSAIC II camera at the 4m-Blanco telescope (CTIO, Chile). Results. The GCS is very poor with SN ≈ 0.6. We identify three subpopulations with peaks at (C − T1) colours of 1.21, 1.42, and 1.72. The bluest population may represent the old, metal-poor component. This interpretation is supported by its shallow density profile. The red population is more concentrated, resembling the galaxy light. The intermediate-colour population is strongly peaked in colour, and we interpret this population as the signature of a starburst whose age depends on the metallicity, but should be quite old, since no signatures of a merger are identifiable. In addition, we find a main sequence in the stellar foreground population, which we attribute to the Sagittarius dwarf tidal stream. Conclusions. The extrordinarily poor GCS of NGC 7507, a massive elliptical galaxy, is an illustration of how important the environmental conditions are for producing rich GCSs.
Fil: Caso, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Richtler, Tom . Universidad de Concepción; Chile
Fil: Bassino, Lilia Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Salinas, R.. University of Turku. Finnish Centre for Astronomy with ESO ; Finlandia
Fil: Lane, R. R.. Universidad de Concepción; Chile
Fil: Romanowsky, A. . University of California Observatories; Estados Unidos. San José State University; Estados Unidos
description Context. There is strong evidence that globular cluster systems (GCSs) of massive galaxies are largely assembled by infall/accretion processes. Therefore, we expect the GCSs of isolated elliptical galaxies to be poor. Although not completely isolated, NGC 7507 is a massive field elliptical galaxy with an apparently very low dark matter content. Aims. We determine the richness, the colour distribution, and the structural properties of the GCS of NGC 7507. Methods. We performed wide-field Washington photometry with data obtained with the MOSAIC II camera at the 4m-Blanco telescope (CTIO, Chile). Results. The GCS is very poor with SN ≈ 0.6. We identify three subpopulations with peaks at (C − T1) colours of 1.21, 1.42, and 1.72. The bluest population may represent the old, metal-poor component. This interpretation is supported by its shallow density profile. The red population is more concentrated, resembling the galaxy light. The intermediate-colour population is strongly peaked in colour, and we interpret this population as the signature of a starburst whose age depends on the metallicity, but should be quite old, since no signatures of a merger are identifiable. In addition, we find a main sequence in the stellar foreground population, which we attribute to the Sagittarius dwarf tidal stream. Conclusions. The extrordinarily poor GCS of NGC 7507, a massive elliptical galaxy, is an illustration of how important the environmental conditions are for producing rich GCSs.
publishDate 2013
dc.date.none.fl_str_mv 2013-07
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/11336/10734
Caso, Juan Pablo; Richtler, Tom ; Bassino, Lilia Patricia; Salinas, R.; Lane, R. R.; et al.; The paucity of globular clusters around the field elliptical NGC 7507; Edp Sciences; Astronomy And Astrophysics; 555; 7-2013; 56-64
0004-6361
url http://hdl.handle.net/11336/10734
identifier_str_mv Caso, Juan Pablo; Richtler, Tom ; Bassino, Lilia Patricia; Salinas, R.; Lane, R. R.; et al.; The paucity of globular clusters around the field elliptical NGC 7507; Edp Sciences; Astronomy And Astrophysics; 555; 7-2013; 56-64
0004-6361
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201321032
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2013/07/aa21032-13/aa21032-13.html
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
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 13.13397

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