Sloan Great Wall

Not to be confused with the CfA2 Great Wall.

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 Sloan Great Wall in a DTFE reconstruction of the inner parts of the 2dF Galaxy Redshift Survey

Size

The wall measures 1.37 billion light-years (1.30×10²⁵ m) in length, located approximately one billion light-years away. In the sky, it is located within the region of the constellations Corvus, Hydra and Centaurus. 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.

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 University in 1989).^[2] 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.^[3][4]

In 2011, it was suggested that the SGW is a chance alignment of three structures, and not a structure in itself.^[5]

See also

• BOSS Great Wall – One of the largest superstructures in the observable universe
• CMB cold spot – Region in space
• The Giant Arc
• Giant Void – Region of outer space
• Great Attractor – Region of overdensity of galaxies within the local supercluster
• Hercules–Corona Borealis Great Wall – Largest known structure in the observable universe
• Large-scale structure of the cosmos – All of space observable from the Earth at the presentPages displaying short descriptions of redirect targets
• Large-scale structure of the observable universe – All of space observable from the Earth at the present
• List of largest cosmic structures
• South Pole Wall – Massive cosmic structure

References

1. Gott, J. Richard, III; et al. (May 2005), "A Map of the Universe", The Astrophysical Journal, 624 (2): 463–484, arXiv:astro-ph/0310571, Bibcode:2005ApJ...624..463G, doi:10.1086/428890, S2CID 9654355{{citation}}: CS1 maint: multiple names: authors list (link) Figure 8 – "Logarithmic Maps of the Universe" – is available as a poster from the homepage of Mario Juric.
2. Geller, Margaret J.; Huchra, John P. (1989-11-17), "Mapping the Universe", Science, 246 (4932): 897–903, Bibcode:1989Sci...246..897G, doi:10.1126/science.246.4932.897, PMID 17812575, S2CID 31328798
3. Einasto, M.; et al. (July 2011), "The Sloan Great Wall. Morphology and Galaxy Content", The Astrophysical Journal, 736 (1): 51, arXiv:1105.1632, Bibcode:2011ApJ...736...51E, doi:10.1088/0004-637X/736/1/51, S2CID 119215944
4. "The Sloan Great Wall -- Supercluster of Galaxies", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-12-24
5. Clowes, Roger G.; Campusano, Luis E.; Graham, Matthew J.; Soechting, Ilona K. (2011). "Two close Large Quasar Groups of size ~ 350 Mpc at z ~ 1.2". Monthly Notices of the Royal Astronomical Society. 419 (1): 556–565. arXiv:1108.6221. Bibcode:2012MNRAS.419..556C. doi:10.1111/j.1365-2966.2011.19719.x. S2CID 31553670.

External links

• NASA Astronomy Picture of the Day: The Sloan Great Wall: Largest Known Structure? (7 November 2007)]