Sloan Great Wall

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Not to be confused with the CfA2 Great Wall.
The Sloan Great Wall in a DTFE reconstruction of the inner parts of the 2dF Galaxy Redshift Survey

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 second largest known object in the observable universe after the Hercules–Corona Borealis Great Wall (HGW).

Until the discovery of HGW in November 2013,[2][3][4] it was the largest known galaxy filament.

The Sloan Great Wall is 2.74 times longer than the CfA2 Great Wall of galaxies, which was discovered by Margaret Geller and John Huchra of Harvard in 1989.[5] It 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. It is followed in size by the supercluster SCl 111.[6][7]

In 2011, it was suggested that the SGW is a chance alignment of three structures, and not a structure in itself.[8]

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References[edit]

  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  Figure 8 – "Logarithmic Maps of the Universe" – is available as a poster from the homepage of Mario Juric.
  2. ^ Horvath I., Hakkila J., and Bagoly Z. (2014). "Possible structure in the GRB sky distribution at redshift two". 
  3. ^ Horvath I., Hakkila J., and Bagoly Z. (2013). The largest structure of the Universe, defined by Gamma-Ray Bursts. arXiv:1311.1104. Bibcode:2013arXiv1311.1104H. 
  4. ^ "Universe's Largest Structure is a Cosmic Conundrum". discovery. 2013-11-19. Retrieved 2013-11-22. 
  5. ^ 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 
  6. ^ Einasto, M. et al. (July 2011), "The Sloan Great Wall. Morphology and Galaxy Content", The Astrophysical Journal 736 (1), arXiv:1105.1632, Bibcode:2011ApJ...736...51E, doi:10.1088/0004-637X/736/1/51 
  7. ^ "The Sloan Great Wall -- Supercluster of Galaxies", SIMBAD (Centre de Données astronomiques de Strasbourg), retrieved 2011-12-24 
  8. ^ 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 ; Bibcode2012MNRAS.419..556C ; doi:10.1111/j.1365-2966.2011.19719.x ;

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