Lyons Groups of Galaxies
Encyclopedia
Lyons Groups of Galaxies (or LGG) are a catalog of nearby groups of galaxies that was created from the sample of galaxies complete up to the limiting apparent magnitude Bo=14.0 with a recession velocity smaller than 5500 km/s.
Two methods were used in group construction: a percolation method derived from Huchra and Geller (1982ApJ...257..423H) and a hierarchical method initiated by Tully (1980ApJ...237..390T). The catalog is a synthesized version of the two results.
The LGG includes 485 groups and 3933 member galaxies.
Two methods were used in group construction: a percolation method derived from Huchra and Geller (1982ApJ...257..423H) and a hierarchical method initiated by Tully (1980ApJ...237..390T). The catalog is a synthesized version of the two results.
The LGG includes 485 groups and 3933 member galaxies.