Empirical properties of the mass discrepancy in groups and clusters of galaxies. VI - Projection effects

Details Empirical properties of the mass discrepancy in groups and clusters of galaxies. VI - Projection effects Empirical properties of the mass discrepancy in groups and clusters of galaxies. VI - Projection effects

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199..549r&link_type=abstract

Astrophysical Journal, vol. 199, Aug. 1, 1975, pt. 1, p. 549-554.

Astronomy and Astrophysics

Astrophysics

Binary Stars, Galactic Clusters, Mass Ratios, Stellar Motions, Astronomical Models, Celestial Mechanics, Circular Orbits, Stellar Spectra, Velocity Distribution, Virial Theorem

Scientific paper

Study of a hypothetical sample of identical double galaxies with circular orbits and randomly distributed relative-velocity and separation vectors indicates that the empirical virial mass and velocity-dispersion relations for double galaxies are almost certainly caused by projection effects. Dynamic properties of loose groups of galaxies and spectroscopic double stars are discussed.

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