Corona Borealis Supercluster

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Corona Borealis Supercluster
Corona borealis supercluster.png
Corona Borealis Supercluster view from Earth.
Observation data (Epoch )
Constellation(s)Corona Borealis
Redshift0.07[1]
Binding mass0.6-12 × 1016[2] M☉
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

The Corona Borealis Supercluster is a supercluster located in the constellation Corona Borealis and the most prominent example of its kind in the Northern Celestial Hemisphere.[3] Dense and compact compared with other superclusters, its mass has been calculated to lie somewhere between 0.6 and 12 × 1016 solar masses (M⊙). It contains the galaxy clusters , Abell 2061, Abell 2065 (the most massive galaxy cluster within the supercluster), Abell 2067, , , and . Of these, Abell 2056, 2061, 2065, 2067 and A2089 are gravitationally bound and in the process of collapsing to form a massive cluster.[2] This entity has an estimated mass of around 1 × 1016 M⊙. If there is inter-cluster mass present, then Abell 2092 may also be involved.[2] It has been estimated to be 100 megaparsecs (330 million light-years) wide and 40 megaparsecs (130 million light years) deep.[3] It has a redshift of 0.07,[1] which is equivalent to a distance of around 265.5 megaparsecs (964 million light-years).

Observational history[]

Astronomers C. Donald Shane and Carl A. Wirtanen were the first to note a concentration or "cloud" of "extragalactic nebulae" in the region during a large-scale survey of extragalactic structures in the sky.[4] George Abell was the first to note the presence of what he called "second-order clusters", namely clusters of clusters in the first publication of his Abell catalogue in 1958.[5]

Postman and colleagues were the first to study the supercluster in detail in 1988, calculating it to have a mass of 8.2 × 1015 solar masses, and contain the Abell clusters Abell 2061, Abell 2065, Abell 2067, , , and . lies 33 megaparsecs (110 million light-years) from the centre of the supercluster and has been considered part of the group by some authors.[1]

lies close by but is more distant, with a line-of-sight association only.[1]

See also[]

References[]

  1. ^ a b c d Postman, M.; Geller, M. J.; Huchra, J. P. (1988). "The dynamics of the Corona Borealis supercluster". Astronomical Journal. 95: 267–83. Bibcode:1988AJ.....95..267P. doi:10.1086/114635.
  2. ^ a b c Pearson, David W.; Batiste, Merida; Batuski, David J. (2014). "The Largest Gravitationally Bound Structures: The Corona Borealis Supercluster - Mass and Bound Extent". Mon. Not. R. Astron. Soc. 441 (2): 1601–1614. arXiv:1404.1308. Bibcode:2014MNRAS.441.1601P. doi:10.1093/mnras/stu693.
  3. ^ a b Marini, F.; Bardelli, S.; Zucca, E.; De Grandi, S.; Cappi, A.; Ettori, S.; Moscardini, L.; Tormen, G.; Diaferio, A. (2004). "BeppoSAX temperature maps of galaxy clusters in the Corona Borealis supercluster: A2061, A2067 and A2124". Monthly Notices of the Royal Astronomical Society. 353 (4): 1219–30. arXiv:astro-ph/0406538. Bibcode:2004MNRAS.353.1219M. doi:10.1111/j.1365-2966.2004.08148.x. S2CID 16713608.
  4. ^ Shane, C. Donald; Wirtanen, Carl A. (1954). "The distribution of extragalactic nebulae". Astronomical Journal. 59: 285–303. Bibcode:1954AJ.....59..285S. doi:10.1086/107014.
  5. ^ Abell, George O. (1958). "The distribution of rich clusters of galaxies. A catalogue of 2712 rich clusters found on the National Geographic Society Palomar Observatory Sky Survey" (PDF). The Astrophysical Journal Supplement Series. 3: 211–88. Bibcode:1958ApJS....3..211A. doi:10.1086/190036. Archived from the original (PDF) on 2018-07-21. Retrieved 2018-11-04.
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