PavoâIndus Supercluster | |
---|---|
![]() Location of the Pavo-Indus Supercluster relative to other superclusters. | |
Observation data ( Epoch J2000) | |
Constellation(s) | Pavo, Indus, Telescopium |
Right ascension | 20h 48m 26s [1] |
Declination | â39° 06′ 09″ [1] |
Parent structure | Laniakea Supercluster |
Major axis | 66 Mpc (215 Mly) |
Redshift | 0.015 (4,500 km/s) [2] |
Distance | 60â70 Mpc (196â228 Mly) |
Other designations | |
SCL 175 [1] |
The PavoâIndus Supercluster is a neighboring supercluster located about 60â70 Mpc (196â228 Mly) [3] [2] [4] away in the constellations of Pavo, Indus, and Telescopium. [5] The supercluster contains three main clusters, Abell 3656, Abell 3698, and Abell 3742. [6]
Other groups and clusters in the supercluster include the NGC 6769 Group and Abell S805 (IC 4765 Group, Pavo II, DRCG 1842-63) [7] [8] and the massive Norma Cluster. [9]
In 2014, it was announced that the PavoâIndus Supercluster is a lobe in a greater supercluster, Laniakea, that is centered on the Great Attractor. The Virgo Supercluster would also be part of this greater supercluster, thus becoming the local supercluster. [10]
The PavoâIndus Supercluster exhibits a wall [11] [12] or filamentary [13] [14] [15] structure that extends to a total length of 66 Mpc (215 Mly). [16] The supercluster along with the TelescopiumâGrus Cloud form parts of a wall bounding the Local Void and the Sculptor Void. [13]
In 1983, in a paper by Winkler et al it was suggested based on redshift maps of the distribution of galaxies that the PavoâIndus Supercluster may be connected to the Centaurus Supercluster. [7] 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 AustraleâAra 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 PavoâIndus supercluster was indeed connected to the Centaurus and Hydra supercluster and that the Virgo Supercluster was an appendage of a larger structure involving these superclusters. [8] Later studies concluded that PavoâIndus formed part of a wall of galaxies similar in size to the CfA2 Great Wall, dubbed the Norma Wall [17] with the Norma Cluster at its center similar to the Coma Cluster. [18] [17] This wall encompasses the PavoâIndus supercluster through the Norma Cluster, passing the ZOA in the Great Attractor region, to meet up with the CentaurusâCrux Cluster at a redshift at about 5,700â6,200 km/s s and the CIZA J1324.7â5736 cluster at a redshift of 5700 km/s [17] while also splitting off to form the Centaurus Wall [19] passing the galactic plane to meet up with Centaurus Cluster [20] where the supercluster originates. [13]
Di Nel la H. et al found no evidence of a connection between PavoâIndus and the PerseusâPisces Supercluster. [11] However, Tully et al. revealed the existence of a filamentary extension of the PavoâIndus Supercluster known as the Arch [10] that caps the Local Void in the supergalactic north and provides a connection to the PerseusâPisces Supercluster [14] [15] before terminating close to the NGC 7242 Cluster. [14]
The PavoâIndus supercluster lies physically close to the Ophiuchus Supercluster and may be connected in an unknown filament between the two superclusters. [21]
PavoâIndus Supercluster | |
---|---|
![]() Location of the Pavo-Indus Supercluster relative to other superclusters. | |
Observation data ( Epoch J2000) | |
Constellation(s) | Pavo, Indus, Telescopium |
Right ascension | 20h 48m 26s [1] |
Declination | â39° 06′ 09″ [1] |
Parent structure | Laniakea Supercluster |
Major axis | 66 Mpc (215 Mly) |
Redshift | 0.015 (4,500 km/s) [2] |
Distance | 60â70 Mpc (196â228 Mly) |
Other designations | |
SCL 175 [1] |
The PavoâIndus Supercluster is a neighboring supercluster located about 60â70 Mpc (196â228 Mly) [3] [2] [4] away in the constellations of Pavo, Indus, and Telescopium. [5] The supercluster contains three main clusters, Abell 3656, Abell 3698, and Abell 3742. [6]
Other groups and clusters in the supercluster include the NGC 6769 Group and Abell S805 (IC 4765 Group, Pavo II, DRCG 1842-63) [7] [8] and the massive Norma Cluster. [9]
In 2014, it was announced that the PavoâIndus Supercluster is a lobe in a greater supercluster, Laniakea, that is centered on the Great Attractor. The Virgo Supercluster would also be part of this greater supercluster, thus becoming the local supercluster. [10]
The PavoâIndus Supercluster exhibits a wall [11] [12] or filamentary [13] [14] [15] structure that extends to a total length of 66 Mpc (215 Mly). [16] The supercluster along with the TelescopiumâGrus Cloud form parts of a wall bounding the Local Void and the Sculptor Void. [13]
In 1983, in a paper by Winkler et al it was suggested based on redshift maps of the distribution of galaxies that the PavoâIndus Supercluster may be connected to the Centaurus Supercluster. [7] 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 AustraleâAra 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 PavoâIndus supercluster was indeed connected to the Centaurus and Hydra supercluster and that the Virgo Supercluster was an appendage of a larger structure involving these superclusters. [8] Later studies concluded that PavoâIndus formed part of a wall of galaxies similar in size to the CfA2 Great Wall, dubbed the Norma Wall [17] with the Norma Cluster at its center similar to the Coma Cluster. [18] [17] This wall encompasses the PavoâIndus supercluster through the Norma Cluster, passing the ZOA in the Great Attractor region, to meet up with the CentaurusâCrux Cluster at a redshift at about 5,700â6,200 km/s s and the CIZA J1324.7â5736 cluster at a redshift of 5700 km/s [17] while also splitting off to form the Centaurus Wall [19] passing the galactic plane to meet up with Centaurus Cluster [20] where the supercluster originates. [13]
Di Nel la H. et al found no evidence of a connection between PavoâIndus and the PerseusâPisces Supercluster. [11] However, Tully et al. revealed the existence of a filamentary extension of the PavoâIndus Supercluster known as the Arch [10] that caps the Local Void in the supergalactic north and provides a connection to the PerseusâPisces Supercluster [14] [15] before terminating close to the NGC 7242 Cluster. [14]
The PavoâIndus supercluster lies physically close to the Ophiuchus Supercluster and may be connected in an unknown filament between the two superclusters. [21]