Table · dataset · 2002
Kinematics of dense clusters of galaxies
Listed in IVOA Registry (Virtual Observatory)
We have measured redshifts in the fields of the 31 R>=1 Abell clusters with 0.02<z<0.05 and |bII|>30{deg}, from medium resolution spectra (5 or 7{AA}).
Description
At least ten of the fields are severely contaminated by superimposed velocity peaks. We derive the mean velocities and velocity dispersions of the 25 dense peaks in the sample.
The abundance of peaks, 6.6x10^-6^h^3^ Mpc^-3^, is consistent with the mean number density of R>1 Abell clusters (Bahcall & Soneira 1983ApJ...270...20B). The range of velocity dispersions is 304-1346 km/s. The median dispersion is 718 km/s.
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The subset of eight systems with cD galaxies has a median velocity dispersion of 792 km/s, close to that of non-cD systems (626 km/s). When these data are combined with 16 cD cluster velocity dispersions from our previous study (Zabludoff et al. 1990ApJS...74....1Z, and Dunn [Proceedings of NATO Conf. 1991]), eight of 25 cD galaxies have peculiar motions larger than half the cluster velocity dispersions. These findings further support the conclusions of Beers & Geller (1983ApJ...274..491B), and Dunn (1991), who argue that cD galaxies do not lie in the global kinematic center, but in local potential minima.
If so, systems with speeding cD's are probably a guide to substructure in dynamically evolving systems.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/106/1273 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 1993AJ....106.1273Z ui.adsabs.harvard.edu/abs/1993AJ....106.1273Z ↗
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/aj/106/1273 ↗
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/aj/106/1273 | 11 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 |