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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/36811
Ver los metadatos del registro completo
id |
CONICETDig_a1e7fd1e57cfe7f91e15392baf449acd |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/36811 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
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 |
_version_ |
1844614523574550528 |
score |
13.070432 |