The Pavo-Indus Supercluster is a neighboring

supercluster A supercluster is a large group of smaller galaxy clusters or galaxy groups; they are among the largest known structures in the universe. The Milky Way is part of the Local Group galaxy group (which contains more than 54 galaxies), which in turn ...

located about away in the constellations of Pavo,

Indus The Indus ( ) is a transboundary river of Asia and a trans-Himalayan river of South and Central Asia. The river rises in mountain springs northeast of Mount Kailash in Western Tibet, flows northwest through the disputed region of Kashmir, ...

, and

Telescopium Telescopium is a minor constellation in the southern celestial hemisphere, one of twelve named in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments. Its name is a Latinized for ...

. The supercluster contains three main clusters, Abell 3656, Abell 3698, and Abell 3742. Other groups and clusters in the supercluster include the NGC 6769 Group and Abell S805 (IC 4765 Group, Pavo II, DRCG 1842-63) and the massive

Norma Cluster The Norma Cluster (ACO 3627 or Abell 3627) is a rich cluster of galaxies located near the center of the Great Attractor; it is about distant. Although it is both nearby and bright, it is difficult to observe because it is located in the Zone of ...

. In 2014 it was announced that the Pavo-Indus Supercluster is a lobe in a greater supercluster, Laniakea, that is centered on the

Great Attractor The Great Attractor is a gravitational anomaly in intergalactic space and the apparent central gravitational point of the Laniakea Supercluster. The observed anomalies suggest a localized concentration of mass millions of times more massive than ...

. The Virgo Supercluster would also be part of this greater supercluster, thus becoming the local supercluster.

Structure

The Pavo-Indus Supercluster exhibits a wall or filamentary structure that extends to a total length of . The supercluster along with the Telescopium−Grus Cloud form parts of a wall bounding the

Local Void The Local Void is a vast, empty region of space, lying adjacent to the Local Group. Discovered by Brent Tully and Rick Fisher in 1987, the Local Void is now known to be composed of three separate sectors, separated by bridges of "wispy fil ...

and the Sculptor Void. Pavo-Indo Supercluster

Nearby superclusters

Centaurus Supercluster

In 1983, Winkler. et al suggested based on redshift maps of the distribution of galaxies that the Pavo-Indus Supercluster may be connected to the

Centaurus Supercluster Centaurus is a bright constellation in the southern sky. One of the 88 modern constellations by area, largest constellations, Centaurus was included among the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one o ...

. Later in 1984, in a collaboration with astronomer Tony Fairall and in a separate paper by Fairall published in 1988 titled ''A redshift map of the Triangulum Australe-Ara region : further indication that Centaurus and Pavo are one and the same supercluster.'' it was concluded based on distribution of galaxies in redshift space that the Pavo-Indus supercluster was indeed connected to the

Centaurus Centaurus is a bright constellation in the southern sky. One of the 88 modern constellations by area, largest constellations, Centaurus was included among the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one o ...

and

Hydra Hydra generally refers to: * Lernaean Hydra, a many-headed serpent in Greek mythology * ''Hydra'' (genus), a genus of simple freshwater animals belonging to the phylum Cnidaria Hydra or The Hydra may also refer to: Astronomy * Hydra (constel ...

supercluster and that the

Virgo Supercluster The Virgo Supercluster (Virgo SC) or the Local Supercluster (LSC or LS) is a mass concentration of galaxies containing the Virgo Cluster and Local Group, which itself contains the Milky Way and Andromeda galaxies, as well as others. At least ...

was an appendage of a larger structure involving these superclusters. Later studies concluded that Pavo-Indus formed part of a wall of galaxies similar in size to the

CfA2 Great Wall The Great Wall (also called Coma Wall), sometimes specifically referred to as the CfA2 Great Wall, is an immense galaxy filament. It is one of the largest known superstructures in the observable universe. This structure was discovered c. 1989 ...

, dubbed the

Norma Wall Norma may refer to: * Norma (given name), a given name (including a list of people with the name) Astronomy *Norma (constellation) * 555 Norma, a minor asteroid *Cygnus Arm or Norma Arm, a spiral arm in the Milky Way galaxy Geography *Norma, Lazi ...

with the

at its center similar to the

Coma Cluster The Coma Cluster (Abell 1656) is a large galaxy cluster, cluster of galaxies that contains over 1,000 identified galaxies. Along with the Leo Cluster (Abell 1367), it is one of the two major clusters comprising the Coma Supercluster. It is loc ...

. This wall compasses the Pavo-Indus supercluster though the Norma Cluster, passing the ZOA in the

region, to meet up with the Centaurus–Crux Cluster at a redshift at about 5,700-6,200 km/s s and the CIZA J1324.7−5736 cluster at a redshift of 5700 km/s while also splitting off to form the Centaurus Wall passing the

galactic plane The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies. The directions perpendicular to the galactic plane point to the galactic poles. In actual usage, the terms ''galactic plane'' and ''galactic poles'' usuall ...

to meet up with Centaurus Cluster where the supercluster originates.

Perseus–Pisces Supercluster

Di Nel la H. et al found no evidence of a connection between Pavo–Indus and the

Perseus–Pisces Supercluster The Perseus–Pisces Supercluster (SCl 40) is one of the largest known structures in the universe. Even at a distance of 250 million light-years, this chain of galaxy clusters extends more than 40° across the northern winter sky. The Perseus-Pis ...

. However, Tully et al. revealed the existence of a filamentary extension of the Pavo-Indus Supercluster known as the Arch that caps the

in the supergalactic north and provides a connection to the Perseus–Pisces Supercluster before terminating close to the NGC 7242 Cluster.

Ophiuchus Supercluster

The Pavo–Indus supercluster lies physically close to the Ophiuchus Supercluster and may be connected in an unknown filament between the two superclusters.

References

External links

The Pavo-Indus Supercluster
from ''An Atlas of the Universe'' {{DEFAULTSORT:Pavo-Indus Supercluster Laniakea Supercluster Galaxy superclusters