Sloan Great Wall
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The Sloan Great Wall (SGW) is a cosmic structure formed by a giant wall of galaxies (a galaxy filament). Its discovery was announced from Princeton University on October 20, 2003, by J. Richard Gott III, Mario Jurić, and their colleagues, based on data from the Sloan Digital Sky Survey.[1]
The wall measures 1.38 billion light-years (1.30×1025 m) in length, located approximately one billion light-years from Earth. It is approximately 1/60 of the diameter of the observable universe, making it the sixth largest known object after the large quasar groups Clowes-Campusano LQG, U1.11, Huge-LQG, the Giant GRB Ring and the galaxy filament Hercules–Corona Borealis Great Wall (Her-CrB GW), respectively.
Until the discovery of the Her–CrB GW in November 2013,[2][3][4] it was the largest known galaxy filament.
The Sloan Great Wall is between 1.8-2.7 times longer than the CfA2 Great Wall of galaxies (discovered by Margaret Geller and John Huchra of Harvard in 1989).[5] It also contains several galactic superclusters, the largest and richest of which is named SCl 126. This is located in the highest density region of the structure.[6][7]
In 2011, it was suggested that the SGW is a chance alignment of three structures, and not a structure in itself.[8]
See also
- List of largest cosmic structures
- Hercules–Corona Borealis Great Wall
- Giant Void
- CMB cold spot
- Large-scale structure of the universe
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found. Figure 8 – "Logarithmic Maps of the Universe" – is available as a poster from the homepage of Mario Juric.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Roger G. Clowes, Luis E. Campusano, Matthew J. Graham, Ilona K. Soechting; "Two close Large Quasar Groups of size ~ 350 Mpc at z ~ 1.2"; Monthly Notices of the Royal Astronomical Society, Volume 419, Issue 1, pp. 556-565 ; January 2012 ; arXiv:1108.6221 ; Bibcode: 2012MNRAS.419..556C ; doi:10.1111/j.1365-2966.2011.19719.x ;
External links
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