Nature and distribution of dark matter. II - Binaries, groups, and clusters

The mass-radius relationship for aggregates of galaxies (binaries, small groups, and clusters) is studied using a simple best-fit analysis. It is found that the binaries are just two galaxies, each with an individual isothermal dark matter halo, moving under mutual gravitational attraction. Power-la...

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Bibliographic Details
Published in:Journal of astrophysics and astronomy 1989-12, Vol.10, p.425-432
Main Authors: Vasanthi, M M, Padmanabhan, T
Format: Article
Language:English
Online Access:Get full text
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Summary:The mass-radius relationship for aggregates of galaxies (binaries, small groups, and clusters) is studied using a simple best-fit analysis. It is found that the binaries are just two galaxies, each with an individual isothermal dark matter halo, moving under mutual gravitational attraction. Power-law relations to describe the groups and clusters are examined, suggesting that two components exist in dark matter: one clustered around the galaxies, and one distributed smoothly. (R.B.)
ISSN:0250-6335