Abell catalog

The Abell catalog ( Abell catalog of rich clusters of galaxies ) is a catalog of 4073 galaxy clusters .

The first version of the catalog was published in 1958 by George Ogden Abell , was created by inspecting the red-sensitive images of the Palomar Observatory Sky Survey with the help of a magnifying glass and contained 2712 galaxy clusters. In 1989 it was supplemented by 1,361 clusters from the previously unrecognized parts of the southern sky , which were found with the help of images from the UK Schmidt telescope . In addition to the coordinates , key figures for the number of members, compactness and approximate distance of the cluster were given.

Admission criteria

Each of these clusters comprises at least 50 galaxies between the brightness of the third brightest cluster member and two magnitudes weaker ( ). In addition, the at least 50 members, assuming a Hubble constant of , must lie in a radius of 2 mega parsec , the Abell radius . The redshifts of the clusters nominally go up to , in fact, larger values were later measured for several Abell clusters. ${\ displaystyle m_ {3}}$ ${\ displaystyle m_ {3} +2}$ ${\ displaystyle H_ {0} \ approx 70 {\ mathrm {km}} / ({\ mathrm {s \ cdot Mpc}})}$ ${\ displaystyle z = 0 {,} 2}$

Examples

Abell 262 in the constellation Andromeda .

Abell 520 in the constellation Orion .

Abell 901 in the constellation Leo forms a supercluster together with Abell 902 .

Abell S0373 Fornax Galaxy Cluster : the second closest galaxy cluster.

Abell 1656 Coma Galaxy Clusters: one of the most famous galaxy clusters.

Abell 1689 in the constellation Virgo , one of the most massive known objects in the universe.

Abell 1835 in the constellation Virgo.

Abell 2667 in the constellation Sculptor through whom a comet galaxy races.

Abell 3266 in the southern sky, one of the largest mass concentrations in the nearby universe.

Abell 3627 Norma galaxy cluster: with a distance of only 210 million light years, a fairly close and well-known galaxy cluster.

Web links

Abell's 1958 publication and catalog, bibcode : 1958ApJS .... 3..211A
Abell, Corwin and Olowin's 1989 publication and catalog, bibcode : 1989ApJS ... 70 .... 1A
Electronic form of the Abell catalog

Individual evidence

↑ ^a ^b G. O. Abell: The distribution of rich clusters of galaxies. A catalog of 2712 rich clusters found on the National Geographic Society Palomar Observatory Sky Survey . In: The Astrophysical Journal Supplement Series . tape 3 , 1958, pp. 211-288 .
^ GO Abell, HG Corwin, RP Olowin: A Catalog of Rich Clusters of Galaxies . In: The Astrophysical Journal Supplement Series . tape 70 , 1989, pp. 1-138 .

[abell-1] G. O. Abell: The distribution of rich clusters of galaxies. A catalog of 2712 rich clusters found on the National Geographic Society Palomar Observatory Sky Survey . In: The Astrophysical Journal Supplement Series . tape 3 , 1958, pp. 211-288 .

[aco-2] GO Abell, HG Corwin, RP Olowin: A Catalog of Rich Clusters of Galaxies . In: The Astrophysical Journal Supplement Series . tape 70 , 1989, pp. 1-138 .