2014A&A...568A..46E


Query : 2014A&A...568A..46E

2014A&A...568A..46E - Astronomy and Astrophysics, volume 568A, 46-46 (2014/8-1)

Tracing a high redshift cosmic web with quasar systems.

EINASTO M., TAGO E., LIETZEN H., PARK C., HEINAEMAEKI P., SAAR E., SONG H., LIIVAMAGI L.J. and EINASTO J.

Abstract (from CDS):

To understand the formation, evolution, and present-day properties of the cosmic web we need to study it at low and high redshifts. We trace the cosmic web at redshifts that range from 1.0≤z≤1.8 by using the quasar (QSO) data from the SDSS DR7 QSO catalogue. We apply a friend-of-friend algorithm to the quasar and random catalogues to determine systems at a series of linking length and analyse richness and sizes of these systems. At the linking lengths l≤30h–1Mpc, the number of quasar systems is larger than the number of systems detected in random catalogues, and the systems themselves have smaller diameters than random systems. The diameters of quasar systems are comparable to the sizes of poor galaxy superclusters in the local Universe. The richest quasar systems have four members. The mean space density of quasar systems, ≃10–7(h–1Mpc)–3, is close to the mean space density of local rich superclusters. At intermediate linking lengths (40≤l≤70h–1Mpc), the richness and length of quasar systems are similar to those derived from random catalogues. Quasar system diameters are similar to the sizes of rich superclusters and supercluster chains in the local Universe. The percolating system, which penetrate the whole sample volume appears in a quasar sample at a smaller linking length than in random samples (85h–1Mpc). At the linking length 70h–1Mpc, the richest systems of quasars have diameters exceeding 500h–1Mpc. Quasar luminosities in systems are not correlated with the system richness. Quasar system catalogues in our web pages and at the Strasbourg Astronomical Data Center (CDS) serve as a database for searching superclusters of galaxies and for tracing the cosmic web at high redshifts.

Abstract Copyright:

Journal keyword(s): large-scale structure of Universe - quasars: general

VizieR on-line data: <Available at CDS (J/A+A/568/A46): qso20all.dat qso30all.dat qso40all.dat qso50all.dat qso60all.dat qso70all.dat qso80all.dat qso20fof.dat qso30fof.dat qso40fof.dat qso50fof.dat qso60fof.dat qso70fof.dat qso80fof.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME Sloan Great Wall ? ~ ~           ~ 169 0

Query : 2014A&A...568A..46E

Basic data :
NAME Sloan Great Wall -- Object of Unknown Nature
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

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Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
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    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
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: 1
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NAME SDSS Great Wall NAME Sloan Great Wall

References (169 between 1850 and 2023) (Total 169)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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2023.02.08-01:45:15

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