Centaurus Cluster

The Centaurus Cluster (A3526) is a cluster of hundreds of galaxies, located approximately 170 million light years away in the Centaurus constellation. The brightest member galaxy is the elliptical galaxy NGC 4696 (~11m). The Centaurus cluster shares its supercluster, the Hydra-Centaurus Supercluster, with IC4329 Cluster and Hydra Cluster.

Not to be confused with Hydra-Centaurus Supercluster or Centaurus A/M83 Group.
Centaurus Cluster
Chandra X-ray image showing the inner 6.7 arcminutes of the core of the Centaurus Cluster. This image shows the hot intracluster medium, at temperatures of a few tens of million kelvins.
Observation data (Epoch J2000)
Constellation(s)Centaurus
Right ascension 12h 48m 51.8s[1]
Declination−41° 18′ 21″[1]
Brightest memberNGC 4696
Number of galaxies~100[1]
Richness class0[2]
Bautz–Morgan classificationI-II [2]
Redshift0.01140 (3 418 km/s)[1]
Distance
(co-moving)		52.4 Mpc (170.9 Mly) h−1
0.705 [1]
X-ray flux15.7×10−11 erg s−1 cm−2 (0.5–2 keV) [1]
Other designations
Abell 3526[1]
NGC 4696: a cosmic question mark

The cluster consists of two different sub-groups of galaxies with different velocities.[3] Cen 30 is the main subgroup containing NGC 4696. Cen 45 which is centered on NGC 4709, is moving at 1500 km/s relative to Cen 30,[3] and is believed to be merging with the main cluster.[4]

See also

References
  1. "NASA/IPAC Extragalactic Database". Results for Centaurus Cluster. Retrieved 2006-10-19.
  2. Abell, George O.; Corwin, Harold G., Jr.; Olowin, Ronald P. (May 1989). "A catalog of rich clusters of galaxies" (PDF). Astrophysical Journal Supplement Series. 70 (May 1989): 1–138. Bibcode:1989ApJS...70....1A. doi:10.1086/191333. ISSN 0067-0049. Retrieved March 13, 2012.
  3. Lucey J. R.; Currie M. J.; Dickens R. J. (1986). "The Centaurus cluster of galaxies. II - The bimodal velocity structure". Monthly Notices of the Royal Astronomical Society. 221: 453–472. Bibcode:1986MNRAS.221..453L. doi:10.1093/mnras/221.2.453.
  4. Churazov, E.; Gilfanov, M.; Forman, W.; Jones, C. (1999). "Evidence for Merging in the Centaurus Cluster". The Astrophysical Journal. 520 (1): 105. arXiv:astro-ph/9802166. Bibcode:1999ApJ...520..105C. doi:10.1086/307421. ISSN 0004-637X.


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