Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies
- Autores
- Smith Castelli, Analía Viviana; Bassino, Lilia Patricia; Richtler, Tom; Cellone, Sergio Aldo; Aruta, Cristian; Infante, Leopoldo
- Año de publicación
- 2008
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present the first colour-magnitude relation (CMR) of early-type galaxies in the central region of the Antlia cluster, obtained from CCD wide-field photometry in the Washington photometric system. Integrated (C - 71) colours, 71 magnitudes, and effective radii have been measured for 93 galaxies (i.e. the largest galaxies sample in the Washington system till now) from the FS90 Antlia Group catalogue. Membership of 37 objects can be confirmed through new radial velocities and data collected from the literature. The resulting colourmagnitude diagram shows that early-type FS90 galaxies that are spectroscopically confirmed Antlia members or that were considered as definite members by FS90, follow a well-defined CMR [σ(C-T1) ~ 0.07 mag] that spans 9 mag in brightness with no apparent change of slope. This relation is very tight for the whole magnitude range but SO galaxies show a larger dispersion, apparently due to a separation of ellipticals and SOs. Antlia displays a slope of -13.6 in a T1 versus (C - 71) diagram, in agreement with results for clusters like Fornax, Virgo, Coma and Perseus, which are dynamically different to Antlia. This fact might indicate that the build-up ofthe CMR in cluster of galaxies is more related to galaxies internal processes than to the influence ofthe environment. Interpreting the CMR as a luminosity-metallicity relation of old stellar systems, the metallicities of the Antlia galaxies define a global relation down to MV ≈-13. We also find, for early-type dwarfs, no clear relation between luminosity and effective radius, indicating a nearly constant mean effective radius of ~1 kpc. This value is also found in several samples of dwarf galaxies in Virgo and Coma.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata - Materia
-
Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: clusters: individual: Antlia
Galaxies: dwarf
Galaxies: elliptical and lenticular, CD
Galaxies: photometry - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/83497
Ver los metadatos del registro completo
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Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxiesSmith Castelli, Analía VivianaBassino, Lilia PatriciaRichtler, TomCellone, Sergio AldoAruta, CristianInfante, LeopoldoCiencias AstronómicasGalaxies: clusters: generalGalaxies: clusters: individual: AntliaGalaxies: dwarfGalaxies: elliptical and lenticular, CDGalaxies: photometryWe present the first colour-magnitude relation (CMR) of early-type galaxies in the central region of the Antlia cluster, obtained from CCD wide-field photometry in the Washington photometric system. Integrated (C - 7<sub>1</sub>) colours, 7<sub>1</sub> magnitudes, and effective radii have been measured for 93 galaxies (i.e. the largest galaxies sample in the Washington system till now) from the FS90 Antlia Group catalogue. Membership of 37 objects can be confirmed through new radial velocities and data collected from the literature. The resulting colourmagnitude diagram shows that early-type FS90 galaxies that are spectroscopically confirmed Antlia members or that were considered as definite members by FS90, follow a well-defined CMR [σ<sub>(C-T<sub>1</sub>)</sub> ~ 0.07 mag] that spans 9 mag in brightness with no apparent change of slope. This relation is very tight for the whole magnitude range but SO galaxies show a larger dispersion, apparently due to a separation of ellipticals and SOs. Antlia displays a slope of -13.6 in a T<sub>1</sub> versus (C - 7<sub>1</sub>) diagram, in agreement with results for clusters like Fornax, Virgo, Coma and Perseus, which are dynamically different to Antlia. This fact might indicate that the build-up ofthe CMR in cluster of galaxies is more related to galaxies internal processes than to the influence ofthe environment. Interpreting the CMR as a luminosity-metallicity relation of old stellar systems, the metallicities of the Antlia galaxies define a global relation down to MV ≈-13. We also find, for early-type dwarfs, no clear relation between luminosity and effective radius, indicating a nearly constant mean effective radius of ~1 kpc. This value is also found in several samples of dwarf galaxies in Virgo and Coma.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2311-2322http://sedici.unlp.edu.ar/handle/10915/83497enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2008.13211.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-10T12:18:22Zoai:sedici.unlp.edu.ar:10915/83497Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-10 12:18:22.941SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies |
| title |
Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies |
| spellingShingle |
Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies Smith Castelli, Analía Viviana Ciencias Astronómicas Galaxies: clusters: general Galaxies: clusters: individual: Antlia Galaxies: dwarf Galaxies: elliptical and lenticular, CD Galaxies: photometry |
| title_short |
Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies |
| title_full |
Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies |
| title_fullStr |
Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies |
| title_full_unstemmed |
Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies |
| title_sort |
Galaxy populations in the Antlia cluster : I. Photometric properties of early-type galaxies |
| dc.creator.none.fl_str_mv |
Smith Castelli, Analía Viviana Bassino, Lilia Patricia Richtler, Tom Cellone, Sergio Aldo Aruta, Cristian Infante, Leopoldo |
| author |
Smith Castelli, Analía Viviana |
| author_facet |
Smith Castelli, Analía Viviana Bassino, Lilia Patricia Richtler, Tom Cellone, Sergio Aldo Aruta, Cristian Infante, Leopoldo |
| author_role |
author |
| author2 |
Bassino, Lilia Patricia Richtler, Tom Cellone, Sergio Aldo Aruta, Cristian Infante, Leopoldo |
| author2_role |
author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Astronómicas Galaxies: clusters: general Galaxies: clusters: individual: Antlia Galaxies: dwarf Galaxies: elliptical and lenticular, CD Galaxies: photometry |
| topic |
Ciencias Astronómicas Galaxies: clusters: general Galaxies: clusters: individual: Antlia Galaxies: dwarf Galaxies: elliptical and lenticular, CD Galaxies: photometry |
| dc.description.none.fl_txt_mv |
We present the first colour-magnitude relation (CMR) of early-type galaxies in the central region of the Antlia cluster, obtained from CCD wide-field photometry in the Washington photometric system. Integrated (C - 7<sub>1</sub>) colours, 7<sub>1</sub> magnitudes, and effective radii have been measured for 93 galaxies (i.e. the largest galaxies sample in the Washington system till now) from the FS90 Antlia Group catalogue. Membership of 37 objects can be confirmed through new radial velocities and data collected from the literature. The resulting colourmagnitude diagram shows that early-type FS90 galaxies that are spectroscopically confirmed Antlia members or that were considered as definite members by FS90, follow a well-defined CMR [σ<sub>(C-T<sub>1</sub>)</sub> ~ 0.07 mag] that spans 9 mag in brightness with no apparent change of slope. This relation is very tight for the whole magnitude range but SO galaxies show a larger dispersion, apparently due to a separation of ellipticals and SOs. Antlia displays a slope of -13.6 in a T<sub>1</sub> versus (C - 7<sub>1</sub>) diagram, in agreement with results for clusters like Fornax, Virgo, Coma and Perseus, which are dynamically different to Antlia. This fact might indicate that the build-up ofthe CMR in cluster of galaxies is more related to galaxies internal processes than to the influence ofthe environment. Interpreting the CMR as a luminosity-metallicity relation of old stellar systems, the metallicities of the Antlia galaxies define a global relation down to MV ≈-13. We also find, for early-type dwarfs, no clear relation between luminosity and effective radius, indicating a nearly constant mean effective radius of ~1 kpc. This value is also found in several samples of dwarf galaxies in Virgo and Coma. Facultad de Ciencias Astronómicas y Geofísicas Instituto de Astrofísica de La Plata |
| description |
We present the first colour-magnitude relation (CMR) of early-type galaxies in the central region of the Antlia cluster, obtained from CCD wide-field photometry in the Washington photometric system. Integrated (C - 7<sub>1</sub>) colours, 7<sub>1</sub> magnitudes, and effective radii have been measured for 93 galaxies (i.e. the largest galaxies sample in the Washington system till now) from the FS90 Antlia Group catalogue. Membership of 37 objects can be confirmed through new radial velocities and data collected from the literature. The resulting colourmagnitude diagram shows that early-type FS90 galaxies that are spectroscopically confirmed Antlia members or that were considered as definite members by FS90, follow a well-defined CMR [σ<sub>(C-T<sub>1</sub>)</sub> ~ 0.07 mag] that spans 9 mag in brightness with no apparent change of slope. This relation is very tight for the whole magnitude range but SO galaxies show a larger dispersion, apparently due to a separation of ellipticals and SOs. Antlia displays a slope of -13.6 in a T<sub>1</sub> versus (C - 7<sub>1</sub>) diagram, in agreement with results for clusters like Fornax, Virgo, Coma and Perseus, which are dynamically different to Antlia. This fact might indicate that the build-up ofthe CMR in cluster of galaxies is more related to galaxies internal processes than to the influence ofthe environment. Interpreting the CMR as a luminosity-metallicity relation of old stellar systems, the metallicities of the Antlia galaxies define a global relation down to MV ≈-13. We also find, for early-type dwarfs, no clear relation between luminosity and effective radius, indicating a nearly constant mean effective radius of ~1 kpc. This value is also found in several samples of dwarf galaxies in Virgo and Coma. |
| publishDate |
2008 |
| dc.date.none.fl_str_mv |
2008 |
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http://sedici.unlp.edu.ar/handle/10915/83497 |
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eng |
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eng |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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