Table · dataset · 2014
High redshift cosmic web with quasar systems
Listed in IVOA Registry (Virtual Observatory)
To understand the formation, evolution, and present-day properties of the cosmic web we need to study it at low and high redshifts.
Description
We trace the cosmic web at redshifts 1.0<z<1.8 using the quasar (QSO) data from in the SDSS DR7 QSO catalogue. We apply a friend-of-friend (FoF) 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<=30Mpc/h, 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.
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The mean space density of quasar systems is close to the mean space density of local rich superclusters. At intermediate linking lengths (40<=l<=70Mpc/h), 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 (85Mpc/h). At the linking length 70Mpc/h, the richest systems of quasars have diameters exceeding 500Mpc. 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 for superclusters of galaxies and for tracing the cosmic web at high redshifts.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/568/A46 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2014A&A...568A..46E ui.adsabs.harvard.edu/abs/2014A%26A...568A..46E ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/a%2Ba/568/a46 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/568/a46 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |