Discovery of a massive supercluster system at z ~ 0.47

H. Lietzen; E. Tempel; L. J. Liivamägi; A. Montero-Dorta; M. Einasto; A. Streblyanska; C. Maraston; J. A. Rubiño-Martín; E. Saar

doi:10.1051/0004-6361/201628261

Discovery of a massive supercluster system at z ~ 0.47

H. Lietzen, E. Tempel, L. J. Liivamägi, A. Montero-Dorta, M. Einasto, A. Streblyanska, C. Maraston, J. A. Rubiño-Martín, E. Saar

Institute of Cosmology & Gravitation

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Abstract

Aims - Superclusters are the largest relatively isolated systems in the cosmic web. Using the SDSS BOSS survey, we search for the largest superclusters in the redshift range 0.43 < z < 0.71.

Methods - We generate a luminosity-density field smoothed over 8 h-1Mpc to detect the large-scale over-density regions. Each individual over-density region is defined as single supercluster in the survey. We define the superclusters so that they are comparable to the superclusters found in the SDSS main survey.

Results - We find a system that we call the BOSS Great Wall (BGW), which consists of two walls with diameters 186 and 173 h-1 Mpc and two other major superclusters with diameters of 64 and 91 h-1 Mpc. As a whole, this system consists of 830 galaxies with the mean redshift 0.47. We estimate the total mass to be approximately 2 × 1017h-1 M⊙. The morphology of the superclusters in the BGW system is similar to the morphology of the superclusters in the Sloan Great Wall region.

Conclusions - The BGW is one of the most extended and massive systems of superclusters found so far in the Universe.

Original language	English
Article number	L4
Journal	Astronomy and Astrophysics
Volume	588
Early online date	15 Mar 2016
DOIs	https://doi.org/10.1051/0004-6361/201628261
Publication status	Published - Apr 2016

Keywords

astro-ph.CO

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title = "Discovery of a massive supercluster system at z ~ 0.47",

abstract = "Aims - Superclusters are the largest relatively isolated systems in the cosmic web. Using the SDSS BOSS survey, we search for the largest superclusters in the redshift range 0.43 < z < 0.71.Methods - We generate a luminosity-density field smoothed over 8 h-1Mpc to detect the large-scale over-density regions. Each individual over-density region is defined as single supercluster in the survey. We define the superclusters so that they are comparable to the superclusters found in the SDSS main survey.Results - We find a system that we call the BOSS Great Wall (BGW), which consists of two walls with diameters 186 and 173 h-1 Mpc and two other major superclusters with diameters of 64 and 91 h-1 Mpc. As a whole, this system consists of 830 galaxies with the mean redshift 0.47. We estimate the total mass to be approximately 2 × 1017h-1 M⊙. The morphology of the superclusters in the BGW system is similar to the morphology of the superclusters in the Sloan Great Wall region.Conclusions - The BGW is one of the most extended and massive systems of superclusters found so far in the Universe.",

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author = "H. Lietzen and E. Tempel and Liivam{\"a}gi, {L. J.} and A. Montero-Dorta and M. Einasto and A. Streblyanska and C. Maraston and Rubi{\~n}o-Mart{\'i}n, {J. A.} and E. Saar",

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T1 - Discovery of a massive supercluster system at z ~ 0.47

AU - Lietzen, H.

AU - Tempel, E.

AU - Liivamägi, L. J.

AU - Montero-Dorta, A.

AU - Einasto, M.

AU - Streblyanska, A.

AU - Maraston, C.

AU - Rubiño-Martín, J. A.

AU - Saar, E.

N1 - 4 pages, accepted as a letter in A

PY - 2016/4

Y1 - 2016/4

N2 - Aims - Superclusters are the largest relatively isolated systems in the cosmic web. Using the SDSS BOSS survey, we search for the largest superclusters in the redshift range 0.43 < z < 0.71.Methods - We generate a luminosity-density field smoothed over 8 h-1Mpc to detect the large-scale over-density regions. Each individual over-density region is defined as single supercluster in the survey. We define the superclusters so that they are comparable to the superclusters found in the SDSS main survey.Results - We find a system that we call the BOSS Great Wall (BGW), which consists of two walls with diameters 186 and 173 h-1 Mpc and two other major superclusters with diameters of 64 and 91 h-1 Mpc. As a whole, this system consists of 830 galaxies with the mean redshift 0.47. We estimate the total mass to be approximately 2 × 1017h-1 M⊙. The morphology of the superclusters in the BGW system is similar to the morphology of the superclusters in the Sloan Great Wall region.Conclusions - The BGW is one of the most extended and massive systems of superclusters found so far in the Universe.

AB - Aims - Superclusters are the largest relatively isolated systems in the cosmic web. Using the SDSS BOSS survey, we search for the largest superclusters in the redshift range 0.43 < z < 0.71.Methods - We generate a luminosity-density field smoothed over 8 h-1Mpc to detect the large-scale over-density regions. Each individual over-density region is defined as single supercluster in the survey. We define the superclusters so that they are comparable to the superclusters found in the SDSS main survey.Results - We find a system that we call the BOSS Great Wall (BGW), which consists of two walls with diameters 186 and 173 h-1 Mpc and two other major superclusters with diameters of 64 and 91 h-1 Mpc. As a whole, this system consists of 830 galaxies with the mean redshift 0.47. We estimate the total mass to be approximately 2 × 1017h-1 M⊙. The morphology of the superclusters in the BGW system is similar to the morphology of the superclusters in the Sloan Great Wall region.Conclusions - The BGW is one of the most extended and massive systems of superclusters found so far in the Universe.

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DO - 10.1051/0004-6361/201628261

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VL - 588

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - L4

ER -

Discovery of a massive supercluster system at z ~ 0.47

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