Deconstructing the Antlia cluster core

Context. The present literature does not give a satisfactory answer to the question about the nature of the "Antlia galaxy cluster". Aims. The radial velocities of galaxies found in the region around the giant ellipticals NGC 3258/3268 range from about 1000 km s-1 to 4000 km s-1. We charac...

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Detalles Bibliográficos
Autores principales: Caso, Juan Pablo, Richtler, T.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
Galaxies: clusters: individual: Antlia cluster
Galaxies: distances and redshifts
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87277
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87277
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Galaxies: clusters: individual: Antlia cluster
Galaxies: distances and redshifts
spellingShingle Ciencias Astronómicas
Galaxies: clusters: individual: Antlia cluster
Galaxies: distances and redshifts
Caso, Juan Pablo
Richtler, T.
Deconstructing the Antlia cluster core
topic_facet Ciencias Astronómicas
Galaxies: clusters: individual: Antlia cluster
Galaxies: distances and redshifts
description Context. The present literature does not give a satisfactory answer to the question about the nature of the "Antlia galaxy cluster". Aims. The radial velocities of galaxies found in the region around the giant ellipticals NGC 3258/3268 range from about 1000 km s-1 to 4000 km s-1. We characterise this region and its possible kinematical and population substructure. Methods. We have obtained VLT-VIMOS multi-object spectra of the galaxy population in the inner part of the Antlia cluster and measure radial velocities for 45 potential members. We supplement our galaxy sample with literature data, ending up with 105 galaxy velocities. Results. We find a large radial velocity dispersion for the entire sample as reported in previous papers. However, we find three groups at about 1900 km s-1, 2800 km s-1, and 3700 km s-1, which we interpret as differences in the recession velocities rather than peculiar velocities. Conclusions. The high radial velocity dispersion of galaxies in the Antlia region reflects a considerable extension along the line of sight.
format Articulo
Articulo
author Caso, Juan Pablo
Richtler, T.
author_facet Caso, Juan Pablo
Richtler, T.
author_sort Caso, Juan Pablo
title Deconstructing the Antlia cluster core
title_short Deconstructing the Antlia cluster core
title_full Deconstructing the Antlia cluster core
title_fullStr Deconstructing the Antlia cluster core
title_full_unstemmed Deconstructing the Antlia cluster core
title_sort deconstructing the antlia cluster core
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/87277
work_keys_str_mv AT casojuanpablo deconstructingtheantliaclustercore
AT richtlert deconstructingtheantliaclustercore
bdutipo_str Repositorios
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