N-body simulations of small groups of galaxies

Details N-body simulations of small groups of galaxies N-body simulations of small groups of galaxies

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...277...38g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 277, Feb. 1, 1984, p. 38-42.

Astronomy and Astrophysics

Astrophysics

15

Astronomical Models, Computerized Simulation, Galactic Clusters, Mass Distribution, Mass To Light Ratios, Virial Theorem, Astronomical Catalogs, Luminosity, Mass Spectra, Standard Deviation

Scientific paper

Loose groups of galaxies, with a small number of members, have been studied by means of N-body dynamical simulations in which the mass spectrum adopted spans nearly four decades. Basically, the standard deviation of the logarithms of the virial masses, due to projection, quasi-equilibrium, and undersampling effects, is larger than previous estimates. The simulations satisfactorily reproduce the standard deviations of the logarithms of virial masses and luminosities, obtained from a subsample of small galaxy deviations of the logarithms of virial masses and luminosities, obtained from a subsample of small galaxy groups taken form Huchra and Geller's (1982) catalog; however, the standard deviation of the mass-to-light ratio shows that masses and luminosities are poorly correlated.

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