The low-luminosity galaxy population in the NGC 5044 Group
- Autores
- Cellone, Sergio Aldo; Buzzoni, Alberto
- Año de publicación
- 2005
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present multicolour imaging for a sample of 33 dwarf and intermediate-luminosity galaxies in the field of the NGC 5044 Group, complemented with mid-resolution spectroscopy for a subsample of 13 objects. With these data, a revised membership and morphological classification is made for the galaxies in the sample. We were able to confirm all but one of the ‘definite members’ included in the spectroscopic subsample, galaxies which were originally classified based on morphological criteria. An important fraction of background galaxies, however, is probably present among ‘likely’ and ‘possible’ members. The presence of a nucleus could be detected in just five out of the nine galaxies originally classified as dE,N, confirming the intrinsic difficulty of photographic-plate morphological classification for this kind of object. Our deep surface photometry provided clear evidence for disc structure in at least three galaxies previously catalogued as dE or dS0. Their transitiontype properties are also evident from the colour–magnitude diagram, where they lie near the late-type galaxy locus, suggesting an evolutionary connection between a parent disc-galaxy population and at least some present-day dEs. Six new dSph candidates were also found, most of them at small projected distances from NGC 5044, the central galaxy of the group. The NGC 5044 Group appears clearly defined in redshift space, with a mean heliocentric radial velocity of vr = 2461 ± 84 km s−1 (z = 0.0082), and a moderate dispersion of σvr = 431 km s−1 . Our kinematical data show no luminosity segregation for early-type galaxies: both dwarf and bright E/S0 systems show very similar velocity distributions (σvr ∼ 290 km s−1 ). This is in contrast to late-type galaxies, which seem to display a broader distribution (σvr ∼ 680 km s−1 )
Fil: Cellone, Sergio Aldo. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Buzzoni, Alberto. Osservatorio Astronomico di Bologna; Italia - Materia
-
Clusters
NGC 5044 Group
Dwarf galaxies
Kinematics (galaxias)
Dynamics (galaxias)
Photometry - 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:11336/38402
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The low-luminosity galaxy population in the NGC 5044 GroupCellone, Sergio AldoBuzzoni, AlbertoClustersNGC 5044 GroupDwarf galaxiesKinematics (galaxias)Dynamics (galaxias)Photometryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present multicolour imaging for a sample of 33 dwarf and intermediate-luminosity galaxies in the field of the NGC 5044 Group, complemented with mid-resolution spectroscopy for a subsample of 13 objects. With these data, a revised membership and morphological classification is made for the galaxies in the sample. We were able to confirm all but one of the ‘definite members’ included in the spectroscopic subsample, galaxies which were originally classified based on morphological criteria. An important fraction of background galaxies, however, is probably present among ‘likely’ and ‘possible’ members. The presence of a nucleus could be detected in just five out of the nine galaxies originally classified as dE,N, confirming the intrinsic difficulty of photographic-plate morphological classification for this kind of object. Our deep surface photometry provided clear evidence for disc structure in at least three galaxies previously catalogued as dE or dS0. Their transitiontype properties are also evident from the colour–magnitude diagram, where they lie near the late-type galaxy locus, suggesting an evolutionary connection between a parent disc-galaxy population and at least some present-day dEs. Six new dSph candidates were also found, most of them at small projected distances from NGC 5044, the central galaxy of the group. The NGC 5044 Group appears clearly defined in redshift space, with a mean heliocentric radial velocity of vr = 2461 ± 84 km s−1 (z = 0.0082), and a moderate dispersion of σvr = 431 km s−1 . Our kinematical data show no luminosity segregation for early-type galaxies: both dwarf and bright E/S0 systems show very similar velocity distributions (σvr ∼ 290 km s−1 ). This is in contrast to late-type galaxies, which seem to display a broader distribution (σvr ∼ 680 km s−1 )Fil: Cellone, Sergio Aldo. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Buzzoni, Alberto. Osservatorio Astronomico di Bologna; ItaliaWiley Blackwell Publishing, Inc2005-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/38402Cellone, Sergio Aldo; Buzzoni, Alberto; The low-luminosity galaxy population in the NGC 5044 Group; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 356; 12-2005; 41-530035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/doi.org/10.1007/978-3-540-71173-5_14info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/chapter/10.1007/978-3-540-71173-5_14info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:45:04Zoai:ri.conicet.gov.ar:11336/38402instacron: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 10:45:05.155CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
The low-luminosity galaxy population in the NGC 5044 Group |
title |
The low-luminosity galaxy population in the NGC 5044 Group |
spellingShingle |
The low-luminosity galaxy population in the NGC 5044 Group Cellone, Sergio Aldo Clusters NGC 5044 Group Dwarf galaxies Kinematics (galaxias) Dynamics (galaxias) Photometry |
title_short |
The low-luminosity galaxy population in the NGC 5044 Group |
title_full |
The low-luminosity galaxy population in the NGC 5044 Group |
title_fullStr |
The low-luminosity galaxy population in the NGC 5044 Group |
title_full_unstemmed |
The low-luminosity galaxy population in the NGC 5044 Group |
title_sort |
The low-luminosity galaxy population in the NGC 5044 Group |
dc.creator.none.fl_str_mv |
Cellone, Sergio Aldo Buzzoni, Alberto |
author |
Cellone, Sergio Aldo |
author_facet |
Cellone, Sergio Aldo Buzzoni, Alberto |
author_role |
author |
author2 |
Buzzoni, Alberto |
author2_role |
author |
dc.subject.none.fl_str_mv |
Clusters NGC 5044 Group Dwarf galaxies Kinematics (galaxias) Dynamics (galaxias) Photometry |
topic |
Clusters NGC 5044 Group Dwarf galaxies Kinematics (galaxias) Dynamics (galaxias) Photometry |
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 present multicolour imaging for a sample of 33 dwarf and intermediate-luminosity galaxies in the field of the NGC 5044 Group, complemented with mid-resolution spectroscopy for a subsample of 13 objects. With these data, a revised membership and morphological classification is made for the galaxies in the sample. We were able to confirm all but one of the ‘definite members’ included in the spectroscopic subsample, galaxies which were originally classified based on morphological criteria. An important fraction of background galaxies, however, is probably present among ‘likely’ and ‘possible’ members. The presence of a nucleus could be detected in just five out of the nine galaxies originally classified as dE,N, confirming the intrinsic difficulty of photographic-plate morphological classification for this kind of object. Our deep surface photometry provided clear evidence for disc structure in at least three galaxies previously catalogued as dE or dS0. Their transitiontype properties are also evident from the colour–magnitude diagram, where they lie near the late-type galaxy locus, suggesting an evolutionary connection between a parent disc-galaxy population and at least some present-day dEs. Six new dSph candidates were also found, most of them at small projected distances from NGC 5044, the central galaxy of the group. The NGC 5044 Group appears clearly defined in redshift space, with a mean heliocentric radial velocity of vr = 2461 ± 84 km s−1 (z = 0.0082), and a moderate dispersion of σvr = 431 km s−1 . Our kinematical data show no luminosity segregation for early-type galaxies: both dwarf and bright E/S0 systems show very similar velocity distributions (σvr ∼ 290 km s−1 ). This is in contrast to late-type galaxies, which seem to display a broader distribution (σvr ∼ 680 km s−1 ) Fil: Cellone, Sergio Aldo. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Buzzoni, Alberto. Osservatorio Astronomico di Bologna; Italia |
description |
We present multicolour imaging for a sample of 33 dwarf and intermediate-luminosity galaxies in the field of the NGC 5044 Group, complemented with mid-resolution spectroscopy for a subsample of 13 objects. With these data, a revised membership and morphological classification is made for the galaxies in the sample. We were able to confirm all but one of the ‘definite members’ included in the spectroscopic subsample, galaxies which were originally classified based on morphological criteria. An important fraction of background galaxies, however, is probably present among ‘likely’ and ‘possible’ members. The presence of a nucleus could be detected in just five out of the nine galaxies originally classified as dE,N, confirming the intrinsic difficulty of photographic-plate morphological classification for this kind of object. Our deep surface photometry provided clear evidence for disc structure in at least three galaxies previously catalogued as dE or dS0. Their transitiontype properties are also evident from the colour–magnitude diagram, where they lie near the late-type galaxy locus, suggesting an evolutionary connection between a parent disc-galaxy population and at least some present-day dEs. Six new dSph candidates were also found, most of them at small projected distances from NGC 5044, the central galaxy of the group. The NGC 5044 Group appears clearly defined in redshift space, with a mean heliocentric radial velocity of vr = 2461 ± 84 km s−1 (z = 0.0082), and a moderate dispersion of σvr = 431 km s−1 . Our kinematical data show no luminosity segregation for early-type galaxies: both dwarf and bright E/S0 systems show very similar velocity distributions (σvr ∼ 290 km s−1 ). This is in contrast to late-type galaxies, which seem to display a broader distribution (σvr ∼ 680 km s−1 ) |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-12 |
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/11336/38402 Cellone, Sergio Aldo; Buzzoni, Alberto; The low-luminosity galaxy population in the NGC 5044 Group; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 356; 12-2005; 41-53 0035-8711 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/38402 |
identifier_str_mv |
Cellone, Sergio Aldo; Buzzoni, Alberto; The low-luminosity galaxy population in the NGC 5044 Group; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 356; 12-2005; 41-53 0035-8711 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1007/978-3-540-71173-5_14 info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/chapter/10.1007/978-3-540-71173-5_14 |
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 |
Wiley Blackwell Publishing, Inc |
publisher.none.fl_str_mv |
Wiley Blackwell Publishing, Inc |
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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1844614489710788608 |
score |
13.070432 |