George Ogden Abell (March 1, 1927 – October 7, 1983) was an astronomer at UCLA who is best known for his catalogue of clusters of galaxies.
The Abell catalogue is an almost complete list of approximately 4000 clusters containing at least 30 members up to a redshift of z = 0.2. See List of galaxy clusters. The original catalogue of clusters in the northern hemisphere was published in 1958. The extended catalogue, including clusters in the southern hemisphere, was published posthumously in 1987 in collaboration with Corwin and Olowin.
GeorgeOgdenAbell (1 marzo 1927 – 7 ottobre 1983) è stato un astronomo statunitense.
Abell ottenne il dottorato nel 1957 al California Institute of Technology, ed iniziò la sua carriera da astronomo facendo da guida nei tour per turisti all'Osservatorio Griffith di Los Angeles.
Abell fu anche co-scopritore di una cometa periodica, 52P/Harrington-Abell.
Abell Cluster: A specific type of galaxy that can be found in the Abell catalogue.
Objects that are considered as an Abell cluster are typically have a very dense concentration of galaxies, usually about 30-50 or more.
Abell radius: A region of space that has a radius of about 2 megaparsecs (or an area of about 12.6 megaparsecs) that contain at least 30-50 galaxies which they can then consider as an Abell cluster.
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