Astronomy:Hydra-Centaurus Supercluster

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Hydra-Centaurus Supercluster
Hyamap.gif
Three-dimensional map of the Hydra Supercluster
Observation data (Epoch J2000)
Right ascension 12h 48m 49.3s
Declination−41° 18′ 40″
Distance
(co-moving)		~54 Mpc (176 Mly)
Other designations
SCI 128
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

The Hydra-Centaurus Supercluster (SCl 128), or the Hydra and Centaurus Superclusters, is a supercluster in two parts, the closest neighbour of Virgo Supercluster.

Hydra-Centaurus

The cluster includes four large galaxy clusters in the Centaurus part

and the proximate

Apart from the central clusters, which are 150 to 200 million light years away, several smaller clusters belong to the group.

Within the proximity of this supercluster lies the Great Attractor, dominated by the Norma Cluster (Abell 3627). This massive cluster of galaxies exerts a large gravitational force, causing all matter within 50 Mpc to experience a bulk flow of 600 km/s toward the Norma Cluster[1]

Laniakea

A 2014 announcement says that the Centaurus Supercluster (Hydra-Centaurus) is just a lobe in a greater supercluster, Laniakea, that is centered on the Great Attractor. That supercluster would include the Virgo Supercluster, therefore including the Milky Way where Earth resides.[2]

See also

References

  1. ↑ Plionis, Manolis; Valdarnini, Riccardo (March 1, 1991). "Evidence for large-scale structure on scales about 300/h MPC". Monthly Notices of the Royal Astronomical Society 249 (March 1, 1991): 46–61. doi:10.1093/mnras/249.1.46. Bibcode: 1991MNRAS.249...46P. 
  2. ↑ R. Brent Tully; Helene Courtois; Yehuda Hoffman; Daniel Pomarède (2 September 2014). "The Laniakea supercluster of galaxies". Nature 513 (7516): 71. doi:10.1038/nature13674. PMID 25186900. Bibcode: 2014Natur.513...71T. 

External links

Coordinates: Sky map 12h 48m 49.3s, −41° 18′ 40″




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