Bautz-Morgan classification

The Bautz-Morgan classification was developed in 1970 by Laura P. Bautz and William Wilson Morgan to categorize galaxy clusters based on their morphology.[1] It defines three main types: I, II, and III. Intermediate types (I-II, II-III) are also allowed. A type IV was initially proposed, but later redacted before the final paper was published.[2]

Classificiation

Examples

Example Type Notes
Abell 2199 Type I
Abell S740 Type I-II
Coma Cluster Type II
Abell 1689 Type II-III
Virgo Cluster Type III
Type IIIS
Type IIIE

See also

References

  1. Bautz, L. P.; Morgan, W. W. (December 1970). "On the Classification of the Forms of Clusters of Galaxies" (PDF). Astrophysical Journal 162: L149. Bibcode:1970ApJ...162L.149B. doi:10.1086/180643. A&AA ID. AAA004.160.015. Retrieved March 10, 2012.
  2. 2.0 2.1 Bautz, Laura P.; Morgan, W. W. (September 1970). "Preliminary Classification of Clusters of Galaxies" (PDF). Bulletin of the American Astronomical Society 2: 294. Bibcode:1970BAAS....2R.294B. A&AA ID. AAA004.160.006. Retrieved March 10, 2012.