A structure in the early Universe at z ∼ 1.3 that exceeds the homogeneity scale of the R-W concordance cosmology

@article{Clowes2013ASI,
  title={A structure in the early Universe at z ∼ 1.3 that exceeds the homogeneity scale of the R-W concordance cosmology},
  author={Roger G. Clowes and Kathryn A. Harris and Srinivasan Raghunathan and Luis E. Campusano and Ilona K. Soechting and Matthew J. Graham},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={429},
  pages={2910-2916}
}
A Large Quasar Group (LQG) of particularly large size and high membership has been identified in the DR7QSO catalogue of the Sloan Digital Sky Survey. It has characteristic size (volume 1/3 ) � 500 Mpc (proper size, present epoch), longest dimension � 1240 Mpc, membership of 73 quasars, and mean redshift ¯ = 1.27. In terms of both size and membership it is the most extreme LQG found in the DR7QSO catalogue for the redshift range 1.0 6 z 6 1.8 of our current investigation. Its location on the… Expand
View PDF on arXiv
107 Citations
Highly Influential Citations
8
Background Citations
49
Methods Citations
12

Figures and Tables from this paper

107 Citations

Citation Type

Citation Type

A giant ring-like structure at 0.78
According to the cosmological principle, Universal large-scale structure is homogeneous and isotropic. The observable Universe, however, shows complex structures even on very large scales. The recent… Expand
Compatibility of the large quasar groups with the concordance cosmological model
We study the compatibility of large quasar groups with the concordance cosmological model. Large quasar groups are very large spatial associations of quasars in the cosmic web, with sizes of 50–250… Expand
Seeing patterns in noise: gigaparsec-scale ‘structures’ that do not violate homogeneity
Clowes et al. (2013) have recently reported the discovery of a Large Quasar Group (LQG), dubbed the Huge-LQG, at redshift z 1:3 in the Data Release 7 quasar catalogue of the Sloan Digital Sky Survey.… Expand
The Excess Density of Field Galaxies near z ~ 0.56 around the Gamma-Ray Burst GRB021004 Position
We test for reliability any signatures of field galaxies clustering in the GRB021004 line of sight. The first signature is the GRB021004 field photometric redshifts distribution based on the 6-m… Expand
Possible structure in the GRB sky distribution at redshift two
Context. Research over the past three decades has revolutionized cosmology while supporting the standard cosmological model. However, the cosmological principle of Universal homogeneity and isotropy… Expand
Environments of strong/ultrastrong, ultraviolet Fe II emitting quasars
We have investigated the strength of ultraviolet (UV) Fe ii emission from quasars within the environments of large quasar groups (LQGs) in comparison with quasars elsewhere, for 1.1 ≤ z_(LQG) ≤ 1.7,… Expand
Testing the homogeneity of the Universe using gamma-ray bursts
Aims. The discovery of a statistically significant clustering in the distribution of gamma-ray bursts (GRBs) has recently been reported. Given that the cluster has a characteristic size of 2000‐3000… Expand
Differential expansion of space and the Hubble flow anisotropy
The Universe on scales $10-100~h^{-1}$ Mpc is dominated by a cosmic web of voids, filaments, sheets and knots of galaxy clusters. These structures participate differently in the global expansion of… Expand
Direct Minkowski Functional analysis of large redshift surveys: a new high-speed code tested on the luminous red galaxy Sloan Digital Sky Survey-DR7 catalogue
As deeper galaxy catalogues are soon to come, it becomes even more important to measure large‐scale fluctuations in the catalogues with robust statistics that cover all moments of the galaxy… Expand
Quasars as a tracer of large-scale structures in the distant universe
We study the dependence of the number density and properties of quasars on the background galaxy density using the currently largest spectroscopic datasets of quasars and galaxies. We construct a… Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 55 REFERENCES
Large-Scale Structure at z = 1.2 Outlined by Mg II Absorbers*
The largest known structure in the high-redshift universe is mapped by at least 18 quasars and spans ~5° × 25 on the sky, with a quasar spatial overdensity of 6-10 times above the mean. This large… Expand
Two close large quasar groups of size ∼ 350 Mpc at
The Clowes & Campusano large quasar group (LQG) at  has been re-examined using the quasar data from the DR7QSO catalogue of the Sloan Digital Sky Survey. In the 1991 discovery, the LQG impinged on… Expand
Two 100-Mpc-scale structures in the three-dimensional distribution of radio galaxies and their implications
We present unequivocal evidence for a huge (80 x 100 x 100 Mpc 3 ) superstructure at redshift z = 0.27 in the three-dimensional distribution of radio galaxies from the Texas-Oxford NVSS Structure 08… Expand
The space distribution of quasars
The space distribution of quasars from the 2dF and SDSS DR5 catalogs in the redshift interval 0.3 < z < 1.9 is analyzed. The distributions of quasars in both catalogs are found to have the following… Expand
Excess clustering on large scales in the MegaZ DR7 photometric redshift survey.
TLDR
A large excess of power is observed in the statistical clustering of luminous red galaxies in the photometric SDSS galaxy sample called MegaZ DR7, which implies an anomaly on the largest physical scales probed by galaxies. Expand
The Challenge of the Largest Structures in the Universe to Cosmology
Large galaxy redshift surveys have long been used to constrain cosmological models and structure formation scenarios. In particular, the largest structures discovered observationally are thought to… Expand
Quasar Environment in the Context of Large Scale Structure at z 0.3
ABSTRACT We are looking at quasar environment in the context of large-scale structure (LSS) —a new approach, giving a more informed interpretation of quasar-galaxy correlations.This paper presents… Expand
The space distribution of faint quasars from the CFHT survey
Basic data are presented for 163 QSOs brighter than B = 20.5 selected from 1000 A/mm CFHT blue grens observations. The data are used to investigate the form of the evolution of QSOs in order to… Expand
200-Mpc-sized structure in the 2dF QSO Redshift survey
The completed 2dF QSO Redshift (2QZ) survey has been used to search for extreme large-scale cosmological structure (∼200 h -1 Mpc) over the redshift range 0 100 h -1 Mpc are in the linear or only… Expand
Structure and dynamics of the Shapley Supercluster Velocity catalogue, general morphology and mass
We present results of our wide-field redshift survey of galaxies in a 285 square degree region of the Shapley Supercluster (SSC), based on a set of 10 529 velocity measurements (including 1201 new… Expand
...
1
2
3
4
5
...