Mass-to-light ratios of two compact groups of galaxies

Details Mass-to-light ratios of two compact groups of galaxies Mass-to-light ratios of two compact groups of galaxies

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231..320r&link_type=abstract

Astrophysical Journal, Part 1, vol. 231, July 15, 1979, p. 320-326.

Astronomy and Astrophysics

Astrophysics

17

Galactic Clusters, Mass To Light Ratios, Radial Velocity, Astronomical Models, Astronomical Spectroscopy, Group Velocity, Ratios, Stellar Magnitude

Scientific paper

The modified virial theorem of Rose (1979) is applied to the Klemola 30 and Phoenix compact groups of galaxies in order to derive the overall group M/L ratios. Spectroscopic data for the two groups are presented which are of sufficient accuracy to determine properly the group velocity dispersions, and magnitude data for the individual group members are discussed. The M/L ratios are found to be 4 for the Phoenix group and 24 for the Klemola 30 group. These results are shown to be strongly model-dependent and in apparent conflict with many previous determinations of M/L ratios for small groups of galaxies.

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