Hydra–Centaurus Supercluster

Template:Short description Template:Infobox galaxy cluster The Hydra–Centaurus Supercluster (SCl 128),<ref name=":6">Template:Cite journal</ref> or the Hydra and Centaurus Superclusters,<ref name=":7">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> was a previously defined supercluster in two parts, which prior to the identification of Laniakea Supercluster in 2014 is the closest neighbour of the former Virgo Supercluster. Its center is located about Template:Convert away,<ref name=":6" /> with it extending to a maximum distance of around Template:Convert.<ref name=":8">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Physical characteristicsEdit

The supercluster includes four large galaxy clusters in the Centaurus part, also known as the "4 clusters'' filament,<ref name=":0" /> or ''4 clusters strand'':<ref name=":3">Template:Cite journal</ref>

The filament which also includes the major cluster Abell S753 and exends up to around Template:Convert to reach the rich galaxy cluster Abell 3581.<ref name=":0" />

Antlia WallEdit

The Antlia Wall,<ref name=":0">Template:Cite journal</ref> also known as the Antlia Strand,<ref name=":1">Template:Cite journal</ref><ref name=":2">Template:Cite journal</ref><ref name=":3" /> Hydra Wall,<ref>Template:Cite journal</ref> Hydra-Antlia wall, Hydra-Antlia extension,<ref name=":5" /> and the Hydra-Antlia filament,<ref>Template:Cite journal</ref> is a filament that emeges from the Centaurus Cluster, passes under the Zone of Avoidance (ZOA) as the "Puppis filament",<ref name=":1" /> to link up the Lepus Cloud.<ref name=":0" /> This filament then passes though a region containing the NGC 1600 Group before crossing the boundary where the gravitional flows of galaxies between the Laniakea and Perseus–Pisces superclusters diverge<ref name=":1" /> to link up with the Perseus–Pisces supercluster at a distance of around Template:Convert from the Centaurus Cluster.<ref name=":2" /> The filament contains two major clusters:

Hydra Cluster (A1060)
Antlia Cluster (AS0636)<ref name=":5">Template:Cite journal</ref>

In 2014, it was revealed that the Antlia Wall along with the rest of the Hydra–Centaurus supercluster is connected to the Perseus–Pisces Supercluster.<ref name=":4">Template:Cite journal</ref> Later in 2017, Pomarède et.al identified based on the flow of galaxies that the Antlia Wall along with the Lepus Cloud are part of a substantial filament known as the Centaurus–Puppis–PP Filament<ref name=":1" /> that extends around Template:Convert from the Centaurus Cluster all the way to the Perseus–Pisces supercluster.<ref name=":2" /> The Centaurus–Puppis–PP Filament along with the Southern Supercluster Strand<ref name=":1" /> which contains the Eridanus-Fornax-Dorado Filament and the Telescopium−Grus Cloud,<ref name=":0" /> are part of wall that makes up the front boundary of the Sculptor Void.

Before 2017, it was not known that the Antlia Wall and the Lepus Cloud were part of the same structure, the Centaurus–Puppis–PP Filament. This is because the Centaurus–Puppis–PP Filament goes under the ZOA of the Milky Way, which caused parts of the filament to be obscured by the disk of the galaxy on the sky, resulting in the naming of the different visible pieces of filament.<ref name=":1" />

Other clustersEdit

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.<ref name="plionis91"> Template:Cite journal</ref>

LaniakeaEdit

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.

ReferencesEdit

Template:Reflist

External linksEdit

Template:Sky