Optical Studies of Small Groups of Galaxies

  • Edwin L. Turner
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 79)


Galaxies occur in a wide variety of systems ranging from binary pairs through small groups to rich clusters. These systems in turn possess a wide range of densities, with typical separations between bright (L ≳ L* = 3.4 × 1010 L) galaxies varying from ≲ 10 kpc up to ~ 1 Mpc. Among the most common of these systems are small, loose groups containing ≲ 10 bright galaxies with separations ≳ 100 kpc. Such systems probably contain a substantial fraction of all galaxies (de Vaucouleurs 1975; van den Bergh 1962; Karachentseva 1973). Familiar examples include the Local Group and M81 group.


Local Group Galaxy Cluster Luminosity Function Simulated Group mUltiplicity Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© International Astronomical Union 1978

Authors and Affiliations

  • Edwin L. Turner
    • 1
  1. 1.Harvard College ObservatoryUSA

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