The Globular Cluster System of NGC 1399, I : a wide-field photometric study

Autores
Dirsch, B.; Richtler, T.; Geisler, D.; Forte, Juan Carlos; Bassino, Lilia Patricia; Gieren, W. P.
Año de publicación
2003
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We investigate the sample of 1175 new nonmagnetic DA white dwarfs with the effective temperatures Teff ≥ 12 000 K, which were extracted from the Data Release 1 of the Sloan Digital Sky Survey. We determined masses, radii, and bolometric luminosities of stars in the sample. The above parameters were derived from the effective temperatures Teff and We present a photometric investigation of the globular cluster population of NGC 1399, the central galaxy in the Fornax cluster, in Washington C and Kron R filters within a field of 360 360 , corresponding to about 200 200 kpc at the Fornax distance. This is the largest area around this galaxy ever studied with CCD photometry. The cluster system of NGC 1399 is found to extend farther than 100 kpc away from the galaxy. The color distribution exhibits a pronounced bimodality. Within a radial distance of about 55 kpc, the red clusters are more strongly concentrated toward the center than the blue clusters. At larger radii, the surface density profiles of the clusters are indistinguishable and match well the distribution of the galaxy light. Over the entire radial distance range, the surface brightness profile of NGC 1399 can be very well fitted by a power law with an exponent of 1.85 and a core radius of 3>3. No steepening of the luminosity profile can be detected at large radii. We suggest that the power-law profile of NGC 1399 results from the galaxy being embedded in a large dark matter halo, which prevents the stellar density profile from steepening outward. The cluster system contains 6450 700 clusters and the specific frequency is found to be 5.1 1.2 in the V band. While NGC 1399 shows a pronounced color gradient the nearby comparison galaxy NGC 1404 does not show such a gradient. Using simple assumptions about the underlying population that formed during the same star formation event as the globular clusters, we present a model in which we use radially changing local specific frequencies for the red and blue subpopulations to fit the observations. We find that within 70 the required specific frequency of the blue clusters alone is a factor of approximately 3 larger than that of the red ones. Outside this radius, however, both populations have the same high local specific frequency of around 8 and 13 (blue and red clusters, respectively)
Fil: Dirsch, B.. Universidad de Concepción; Chile
Fil: Richtler, T.. Universidad de Concepción; Chile
Fil: Geisler, D.. Universidad de Concepción; Chile
Fil: Forte, Juan Carlos. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Bassino, Lilia Patricia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Gieren, W. P.. Universidad de Concepción; Chile
Materia
Elliptical galaxies
Lenticular galaxies
Halos
NGC 1399 (galaxia)
Photometry
Star clusters
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/36811

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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling The Globular Cluster System of NGC 1399, I : a wide-field photometric studyDirsch, B.Richtler, T.Geisler, D.Forte, Juan CarlosBassino, Lilia PatriciaGieren, W. P.Elliptical galaxiesLenticular galaxiesHalosNGC 1399 (galaxia)PhotometryStar clustershttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We investigate the sample of 1175 new nonmagnetic DA white dwarfs with the effective temperatures Teff ≥ 12 000 K, which were extracted from the Data Release 1 of the Sloan Digital Sky Survey. We determined masses, radii, and bolometric luminosities of stars in the sample. The above parameters were derived from the effective temperatures Teff and We present a photometric investigation of the globular cluster population of NGC 1399, the central galaxy in the Fornax cluster, in Washington C and Kron R filters within a field of 360 360 , corresponding to about 200 200 kpc at the Fornax distance. This is the largest area around this galaxy ever studied with CCD photometry. The cluster system of NGC 1399 is found to extend farther than 100 kpc away from the galaxy. The color distribution exhibits a pronounced bimodality. Within a radial distance of about 55 kpc, the red clusters are more strongly concentrated toward the center than the blue clusters. At larger radii, the surface density profiles of the clusters are indistinguishable and match well the distribution of the galaxy light. Over the entire radial distance range, the surface brightness profile of NGC 1399 can be very well fitted by a power law with an exponent of 1.85 and a core radius of 3>3. No steepening of the luminosity profile can be detected at large radii. We suggest that the power-law profile of NGC 1399 results from the galaxy being embedded in a large dark matter halo, which prevents the stellar density profile from steepening outward. The cluster system contains 6450 700 clusters and the specific frequency is found to be 5.1 1.2 in the V band. While NGC 1399 shows a pronounced color gradient the nearby comparison galaxy NGC 1404 does not show such a gradient. Using simple assumptions about the underlying population that formed during the same star formation event as the globular clusters, we present a model in which we use radially changing local specific frequencies for the red and blue subpopulations to fit the observations. We find that within 70 the required specific frequency of the blue clusters alone is a factor of approximately 3 larger than that of the red ones. Outside this radius, however, both populations have the same high local specific frequency of around 8 and 13 (blue and red clusters, respectively)Fil: Dirsch, B.. Universidad de Concepción; ChileFil: Richtler, T.. Universidad de Concepción; ChileFil: Geisler, D.. Universidad de Concepción; ChileFil: Forte, Juan Carlos. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Bassino, Lilia Patricia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Gieren, W. P.. Universidad de Concepción; ChileIOP Publishing2003-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/36811Dirsch, B.; Richtler, T.; Geisler, D.; Forte, Juan Carlos; Bassino, Lilia Patricia; et al.; The Globular Cluster System of NGC 1399, I : a wide-field photometric study; IOP Publishing; Astronomical Journal; 125; 12-2003; 1908-19250004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1086/368238info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/368238/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:47:52Zoai:ri.conicet.gov.ar:11336/36811instacron: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:34982025-09-29 10:47:52.709CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The Globular Cluster System of NGC 1399, I : a wide-field photometric study
title The Globular Cluster System of NGC 1399, I : a wide-field photometric study
spellingShingle The Globular Cluster System of NGC 1399, I : a wide-field photometric study
Dirsch, B.
Elliptical galaxies
Lenticular galaxies
Halos
NGC 1399 (galaxia)
Photometry
Star clusters
title_short The Globular Cluster System of NGC 1399, I : a wide-field photometric study
title_full The Globular Cluster System of NGC 1399, I : a wide-field photometric study
title_fullStr The Globular Cluster System of NGC 1399, I : a wide-field photometric study
title_full_unstemmed The Globular Cluster System of NGC 1399, I : a wide-field photometric study
title_sort The Globular Cluster System of NGC 1399, I : a wide-field photometric study
dc.creator.none.fl_str_mv Dirsch, B.
Richtler, T.
Geisler, D.
Forte, Juan Carlos
Bassino, Lilia Patricia
Gieren, W. P.
author Dirsch, B.
author_facet Dirsch, B.
Richtler, T.
Geisler, D.
Forte, Juan Carlos
Bassino, Lilia Patricia
Gieren, W. P.
author_role author
author2 Richtler, T.
Geisler, D.
Forte, Juan Carlos
Bassino, Lilia Patricia
Gieren, W. P.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Elliptical galaxies
Lenticular galaxies
Halos
NGC 1399 (galaxia)
Photometry
Star clusters
topic Elliptical galaxies
Lenticular galaxies
Halos
NGC 1399 (galaxia)
Photometry
Star clusters
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We investigate the sample of 1175 new nonmagnetic DA white dwarfs with the effective temperatures Teff ≥ 12 000 K, which were extracted from the Data Release 1 of the Sloan Digital Sky Survey. We determined masses, radii, and bolometric luminosities of stars in the sample. The above parameters were derived from the effective temperatures Teff and We present a photometric investigation of the globular cluster population of NGC 1399, the central galaxy in the Fornax cluster, in Washington C and Kron R filters within a field of 360 360 , corresponding to about 200 200 kpc at the Fornax distance. This is the largest area around this galaxy ever studied with CCD photometry. The cluster system of NGC 1399 is found to extend farther than 100 kpc away from the galaxy. The color distribution exhibits a pronounced bimodality. Within a radial distance of about 55 kpc, the red clusters are more strongly concentrated toward the center than the blue clusters. At larger radii, the surface density profiles of the clusters are indistinguishable and match well the distribution of the galaxy light. Over the entire radial distance range, the surface brightness profile of NGC 1399 can be very well fitted by a power law with an exponent of 1.85 and a core radius of 3>3. No steepening of the luminosity profile can be detected at large radii. We suggest that the power-law profile of NGC 1399 results from the galaxy being embedded in a large dark matter halo, which prevents the stellar density profile from steepening outward. The cluster system contains 6450 700 clusters and the specific frequency is found to be 5.1 1.2 in the V band. While NGC 1399 shows a pronounced color gradient the nearby comparison galaxy NGC 1404 does not show such a gradient. Using simple assumptions about the underlying population that formed during the same star formation event as the globular clusters, we present a model in which we use radially changing local specific frequencies for the red and blue subpopulations to fit the observations. We find that within 70 the required specific frequency of the blue clusters alone is a factor of approximately 3 larger than that of the red ones. Outside this radius, however, both populations have the same high local specific frequency of around 8 and 13 (blue and red clusters, respectively)
Fil: Dirsch, B.. Universidad de Concepción; Chile
Fil: Richtler, T.. Universidad de Concepción; Chile
Fil: Geisler, D.. Universidad de Concepción; Chile
Fil: Forte, Juan Carlos. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Bassino, Lilia Patricia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Gieren, W. P.. Universidad de Concepción; Chile
description We investigate the sample of 1175 new nonmagnetic DA white dwarfs with the effective temperatures Teff ≥ 12 000 K, which were extracted from the Data Release 1 of the Sloan Digital Sky Survey. We determined masses, radii, and bolometric luminosities of stars in the sample. The above parameters were derived from the effective temperatures Teff and We present a photometric investigation of the globular cluster population of NGC 1399, the central galaxy in the Fornax cluster, in Washington C and Kron R filters within a field of 360 360 , corresponding to about 200 200 kpc at the Fornax distance. This is the largest area around this galaxy ever studied with CCD photometry. The cluster system of NGC 1399 is found to extend farther than 100 kpc away from the galaxy. The color distribution exhibits a pronounced bimodality. Within a radial distance of about 55 kpc, the red clusters are more strongly concentrated toward the center than the blue clusters. At larger radii, the surface density profiles of the clusters are indistinguishable and match well the distribution of the galaxy light. Over the entire radial distance range, the surface brightness profile of NGC 1399 can be very well fitted by a power law with an exponent of 1.85 and a core radius of 3>3. No steepening of the luminosity profile can be detected at large radii. We suggest that the power-law profile of NGC 1399 results from the galaxy being embedded in a large dark matter halo, which prevents the stellar density profile from steepening outward. The cluster system contains 6450 700 clusters and the specific frequency is found to be 5.1 1.2 in the V band. While NGC 1399 shows a pronounced color gradient the nearby comparison galaxy NGC 1404 does not show such a gradient. Using simple assumptions about the underlying population that formed during the same star formation event as the globular clusters, we present a model in which we use radially changing local specific frequencies for the red and blue subpopulations to fit the observations. We find that within 70 the required specific frequency of the blue clusters alone is a factor of approximately 3 larger than that of the red ones. Outside this radius, however, both populations have the same high local specific frequency of around 8 and 13 (blue and red clusters, respectively)
publishDate 2003
dc.date.none.fl_str_mv 2003-12
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/11336/36811
Dirsch, B.; Richtler, T.; Geisler, D.; Forte, Juan Carlos; Bassino, Lilia Patricia; et al.; The Globular Cluster System of NGC 1399, I : a wide-field photometric study; IOP Publishing; Astronomical Journal; 125; 12-2003; 1908-1925
0004-6256
CONICET Digital
CONICET
url http://hdl.handle.net/11336/36811
identifier_str_mv Dirsch, B.; Richtler, T.; Geisler, D.; Forte, Juan Carlos; Bassino, Lilia Patricia; et al.; The Globular Cluster System of NGC 1399, I : a wide-field photometric study; IOP Publishing; Astronomical Journal; 125; 12-2003; 1908-1925
0004-6256
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1086/368238
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/368238/meta
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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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