Ophiuchus Supercluster

The local Universe, including the Ophiuchus Supercluster
Credit: Ken-ichi Wakamatsu and Matthew Malkan

Observation data (Epoch J2000)
Constellation(s)| Ophiuchus
Right ascension|  13h 25m 00s[1][2]
Declination| −30° 00′ 00″[2][1]
Major axis| 303 Mly (92.8 Mpc)[3]: 14 [lower-alpha 1]
Redshift| z= 0,028
Distance
(co-moving)| 455 ± 32.0 Mly (139.6 ± 9.8 Mpc) h−167.80 ± 0.077 (Ophiuchus Cluster)[4]
Other designations
Ophiuchus Supercluster[1], Oph Supercl[1], Ophiuchus BoA[3]
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

The Ophiuchus Supercluster is a nearby galaxy supercluster in the constellation Ophiuchus.[6][7] The supercluster forms the far wall of the Ophiuchus Void; it may also be connected in a filament with the Pavo-Indus-Telescopium and the Hercules Superclusters.[7][8] This supercluster is centered on the cD cluster (Abell class type I) Ophiuchus Cluster, and has at least two more galaxy clusters, four more galaxy groups, and several field galaxies as members.[citation needed]

In 2014, it was identified that the Ophiuchus Cluster, alongside its surroundings, is part of a greater supercluster, Laniakea–a basin of attraction centered on the Great Attractor, in which the Virgo Supercluster is also now considered a lobe of.[5][lower-alpha 2] A subsequent study based on observations of basins of attraction suggested a basin of attraction around Ophiuchus Cluster may be associated with Laniakea, and also have found both are moving toward the Shapley Concentration.[3] They have hence been suggested to be likely part of this even larger structure.[3]

In February 2020, astronomers reported that a 1.5 million light-year wide cavity in the Ophiuchus Supercluster originated from the central galaxy of the Ophiuchus Cluster. The cD galaxy, NeVe 1, is the site of the Ophiuchus Supercluster eruption, triggered by the ejection of ~270 million solar masses (M☉) from the supermassive black hole of NeVe 1, called WISEA J171227.81-232210.7. This may be the largest known explosion in the Universe since the Big Bang.[9][10][11][12]

## Discovery

Ken-ichi Wakamatsu of Gifu University and Matthew Malkan discovered Ophiuchus Cluster in 1981 on Palomar Schmidt IV-N Plates during a hidden globular cluster survey.[6] Perhaps, determining characteristics of a supercluster will help to more correctly explain the excess velocity component of the local group of galaxies.[7]

## Notes

1. ↑ The calculated volume in Valade et al. (2024) is 0.80×106 Mpc per cube.
2. ↑ Although not directly stated in Tully et al. (2014), the said paper mentioned "an extension to the Ophiuchus Cluster"

## References

1. ↑ 1.0 1.1 1.2 1.3 "Ophiuchus Supercluster". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Ophiuchus+Supercluster.
2. ↑ 2.0 2.1 Colin, Jacques; Mohayaee, Roya; Rameez, Mohamed; Sarkar, Subir (2017). "High-redshift radio galaxies and divergence from the CMB dipole". Monthly Notices of the Royal Astronomical Society 471 (1): 1045. doi:10.1093/mnras/stx1631. Bibcode: 2017MNRAS.471.1045C.
3. ↑ 3.0 3.1 3.2 3.3 Valade, A.; Libeskind, N. I.; Pomarède, D.; Tully, R. B.; Hoffman, Y.; Pfeifer, S.; Kourkchi, E. (2024). "Identification of basins of attraction in the local Universe". Nature Astronomy 8 (12): 1610. doi:10.1038/s41550-024-02370-0. Bibcode: 2024NatAs...8.1610V.
4. ↑ Template:NED link
5. ↑ 5.0 5.1 R. Brent Tully; Helene Courtois; Yehuda Hoffman; Daniel Pomarède (2 September 2014). "The Laniakea supercluster of galaxies". Nature 513 (7516): 71–3. 4 September 2014. doi:10.1038/nature13674. PMID 25186900. Bibcode: 2014Natur.513...71T.
6. ↑ 6.0 6.1 Wakamatsu, Ken-ichi (January 2000). "The Ophiuchus Supercluster Observed with FLAIR". https://www.researchgate.net/publication/234384028. Retrieved 18 April 2019.
7. ↑ 7.0 7.1 7.2 Okamura, Sadanori; Karoji, Hiroshi; Jugaku, Jun; Parker, Quentin A.; Menzies, John W.; Sekiguchi, Kazuhiro; Malkan, Matthew; Wakamatsu, Ken-ichi et al. (1 August 2000). "Large-scale structure of galaxies in the Ophiuchus region" (in en). Monthly Notices of the Royal Astronomical Society 316 (2): 326–344. doi:10.1046/j.1365-8711.2000.03531.x. Bibcode: 2000MNRAS.316..326H.
8. ↑ (in en) Mysteries of the Milky Way. The Rosen Publishing Group. 2008. p. 129. ISBN 978-1-4042-1404-0. https://books.google.com/books?id=x0iKqa3CdY0C&pg=PA129.
9. ↑ Giacintucci, S.; Markevitch, M.; Johnston-Hollitt, M.; Wik, D. R.; Wang, Q. H. S.; Clarke, T. E. (2020-02-27). "Discovery of a giant radio fossil in the Ophiuchus galaxy cluster". The Astrophysical Journal 891 (1): 1. doi:10.3847/1538-4357/ab6a9d. ISSN 1538-4357. Bibcode: 2020ApJ...891....1G.
10. ↑ Overbye, Dennis (6 March 2020). "This Black Hole Blew a Hole in the Cosmos – The galaxy cluster Ophiuchus was doing just fine until WISEA J171227.81-232210.7 – a black hole several billion times as massive as our sun – burped on it.". The New York Times. https://www.nytimes.com/2020/03/06/science/black-hole-cosmos-astrophysics.html. Retrieved 6 March 2020.
11. ↑ "Biggest cosmic explosion ever detected left huge dent in space". The Guardian. 27 February 2020. https://www.theguardian.com/science/2020/feb/27/biggest-cosmic-explosion-ever-detected-makes-huge-dent-in-space. Retrieved 6 March 2020.
12. ↑ "Astronomers detect biggest explosion in the history of the Universe". Science Daily. 27 February 2020. https://www.sciencedaily.com/releases/2020/02/200227114459.htm. Retrieved 6 March 2020.

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