Lyons Groups of Galaxies

Lyons Groups of Galaxies (or LGG ) is an astronomical catalog of nearby galaxy groups completely down to an apparent brightness m _B0 = 14.0 ^m and escape speeds less than 5,500 km / s .

method

Two different methods of group assignment were used when creating the catalog:

A filtering method developed by Huchra and Geller and a hierarchical method first used by R. Brent Tully . The catalog is the combination of the results of both methods.

scope

The LGG contains 485 groups and 3,933 galaxies .

Web links

Individual evidence

^ JP Huchra, MJ Geller: Groups of galaxies. I - Nearby groups . (PDF) In: Astrophysical Journal . 257, No. June 15, 1982, June 1982, pp. 423-437. bibcode : 1982ApJ ... 257..423H . doi : 10.1086 / 160000 .
^ RB Tully : Nearby groups of galaxies. I - The NGC 1023 group . (PDF) In: Astrophysical Journal . 237, No. Apr. 15, 1980, April 1980, pp. 390-403. bibcode : 1980ApJ ... 237..390T . doi : 10.1086 / 157881 .

Web links

LGG description at CDS
complete LGG list at CDS
ADS: General study of group membership. II - Assignments to galaxy groups, bibcode : 1993A & AS..100 ... 47G

[HG-1] JP Huchra, MJ Geller: Groups of galaxies. I - Nearby groups . (PDF) In: Astrophysical Journal . 257, No. June 15, 1982, June 1982, pp. 423-437. bibcode : 1982ApJ ... 257..423H . doi : 10.1086 / 160000 .

[Tully-2] RB Tully : Nearby groups of galaxies. I - The NGC 1023 group . (PDF) In: Astrophysical Journal . 237, No. Apr. 15, 1980, April 1980, pp. 390-403. bibcode : 1980ApJ ... 237..390T . doi : 10.1086 / 157881 .