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The Astrophysical Journal
Article . 1993 . Peer-reviewed
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Archivio istituzionale della ricerca - Università di Trieste
Article . 1993
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ArTS - Archivio della ricerca dell' Università degli Studi di Trieste
Article . 1993
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https://dx.doi.org/10.1086/172...
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Velocity dispersions in galaxy clusters

descriptionPublicationkeyboard_double_arrow_right Article 01 Feb 1993 Italy English Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 404, page 38 (issn: 0004-637X, eissn: 1538-4357, Copyright policy )
Authors: GIRARDI, MARISA; BIVIANO A.; GIURICIN G.; MARDIROSSIAN, FABIO; MEZZETTI, MARINO;

doi: 10.1086/172256

handle: 11368/1695148

Velocity dispersions in galaxy clusters

Abstract

We analyze the velocity dispersions of 79 galaxy clusters having at least 30 galaxies with available redshifts. We show that different estimates of velocity dispersion give similar results on cluster samples of at least 20 galaxies each. However, only robust estimates of velocity dispersion seem to be efficient on cluster samples with 10 galaxies each. A significant correlation is found to exist between the velocity dispersion and the cluster richness. We provide the distribution function of cluster velocity dispersions, normalized to the complete sample by Abell, Corwin, & Olowin (1989). Available theoretical models are compared with this distribution function.

Country
Italy
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Keywords

STATISTICAL CORRELATION, COMPUTATIONAL ASTROPHYSICS, ASTRONOMICAL MODELS, CORRELATION COEFFICIENTS, DISTRIBUTION FUNCTIONS, GALACTIC CLUSTERS; VELOCITY DISTRIBUTION; ASTRONOMICAL MODELS; COMPUTATIONAL ASTROPHYSICS; CORRELATION COEFFICIENTS; DISTRIBUTION FUNCTIONS; RED SHIFT; STATISTICAL CORRELATION, RED SHIFT, GALACTIC CLUSTERS, VELOCITY DISTRIBUTION

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    selected citations
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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 115
    popularity
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    		 Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
115
Top 10%
Top 10%
Average
gold