The structure of nearby clusters of galaxies Hierarchical clustering and an application to the Leo region

A new method of classifying groups of galaxies, called hierarchical clustering, is presented as a tool for the investigation of nearby groups of galaxies. The method is free from model assumptions about the groups. The scaling of the different coordinates is necessary, and the level from which one a...

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Detalles Bibliográficos
Autor principal: Materne, J
Lenguaje:eng
Publicado: 1978
Materias:
Astrophysics and Astronomy
Acceso en línea:http://cds.cern.ch/record/879200
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author Materne, J
author_facet Materne, J
author_sort Materne, J
collection CERN
description A new method of classifying groups of galaxies, called hierarchical clustering, is presented as a tool for the investigation of nearby groups of galaxies. The method is free from model assumptions about the groups. The scaling of the different coordinates is necessary, and the level from which one accepts the groups as real has to be determined. Hierarchical clustering is applied to an unbiased sample of galaxies in the Leo region. Five distinct groups result which have reasonable physical properties, such as low crossing times and conservative mass-to-light ratios, and which follow a radial velocity- luminosity relation. Only 4 out of 39 galaxies were adopted as field galaxies. (27 refs).
id cern-879200
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1978
record_format invenio
spelling cern-8792002019-09-30T06:29:59Zhttp://cds.cern.ch/record/879200engMaterne, JThe structure of nearby clusters of galaxies Hierarchical clustering and an application to the Leo regionAstrophysics and AstronomyA new method of classifying groups of galaxies, called hierarchical clustering, is presented as a tool for the investigation of nearby groups of galaxies. The method is free from model assumptions about the groups. The scaling of the different coordinates is necessary, and the level from which one accepts the groups as real has to be determined. Hierarchical clustering is applied to an unbiased sample of galaxies in the Leo region. Five distinct groups result which have reasonable physical properties, such as low crossing times and conservative mass-to-light ratios, and which follow a radial velocity- luminosity relation. Only 4 out of 39 galaxies were adopted as field galaxies. (27 refs).oai:cds.cern.ch:8792001978
spellingShingle Astrophysics and Astronomy
Materne, J
The structure of nearby clusters of galaxies Hierarchical clustering and an application to the Leo region
title The structure of nearby clusters of galaxies Hierarchical clustering and an application to the Leo region
title_full The structure of nearby clusters of galaxies Hierarchical clustering and an application to the Leo region
title_fullStr The structure of nearby clusters of galaxies Hierarchical clustering and an application to the Leo region
title_full_unstemmed The structure of nearby clusters of galaxies Hierarchical clustering and an application to the Leo region
title_short The structure of nearby clusters of galaxies Hierarchical clustering and an application to the Leo region
title_sort structure of nearby clusters of galaxies hierarchical clustering and an application to the leo region
topic Astrophysics and Astronomy
url http://cds.cern.ch/record/879200
work_keys_str_mv AT maternej thestructureofnearbyclustersofgalaxieshierarchicalclusteringandanapplicationtotheleoregion
AT maternej structureofnearbyclustersofgalaxieshierarchicalclusteringandanapplicationtotheleoregion

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