Spatial correlations in a redshift survey of apm galaxy clusters
We have constructed a new catalog of rich clusters of galaxies by applying an objective selection algorithm to the APM Galaxy Survey. We have measured redshifts for 173 clusters from this catalog leading to a redshift survey of over 200 rich APM clusters with z ≲ 0.1 when we include published redshi...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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Institute of Physics Publishing
1993
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| _version_ | 1797084934649675776 |
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| author | Dalton, G Efstathiou, G Maddox, S Sutherland, W |
| author_facet | Dalton, G Efstathiou, G Maddox, S Sutherland, W |
| author_sort | Dalton, G |
| collection | OXFORD |
| description | We have constructed a new catalog of rich clusters of galaxies by applying an objective selection algorithm to the APM Galaxy Survey. We have measured redshifts for 173 clusters from this catalog leading to a redshift survey of over 200 rich APM clusters with z ≲ 0.1 when we include published redshifts. The mean space density for this subsample is n̄ = 2.4 × 10-5 h3 Mpc 3 ,2i.e., about four times the mean space density of R ≥ 1 Abell clusters. The spatial correlation function for our redshift sample can be approximated by ξcc(s) = (r0/s)2 with r0 = 12.9 ± 1.4 h-1 Mpc. The correlation length for the 93 richest clusters in our sample is r0 = 14 ± 4 h-1 Mpc. These results are consistent with the amplitude for ξcc expected in the standard cold dark matter model on scales ≲10 h-1 Mpc and are lower than the amplitude (r0 ∼ 25 h-1 Mpc) found by Bahcall and Soneira from the Abell catalog. However, our results indicate more clustering than expected in the standard cold dark matter model on scales ≲ 10 h-1 Mpc. We argue that the APM cluster catalog is more homogeneous than the Abell sample, and we demonstrate that our redshift-space correlation function is free from spurious large-scale anisotropies and is compatible with small (≳500 km s-1) cluster peculiar velocities. |
| first_indexed | 2024-03-07T02:02:06Z |
| format | Journal article |
| id | oxford-uuid:9db78cc1-c56f-498f-9368-cb80564a0094 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:02:06Z |
| publishDate | 1993 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:9db78cc1-c56f-498f-9368-cb80564a00942022-03-27T00:45:03ZSpatial correlations in a redshift survey of apm galaxy clustersJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9db78cc1-c56f-498f-9368-cb80564a0094EnglishSymplectic Elements at OxfordInstitute of Physics Publishing1993Dalton, GEfstathiou, GMaddox, SSutherland, WWe have constructed a new catalog of rich clusters of galaxies by applying an objective selection algorithm to the APM Galaxy Survey. We have measured redshifts for 173 clusters from this catalog leading to a redshift survey of over 200 rich APM clusters with z ≲ 0.1 when we include published redshifts. The mean space density for this subsample is n̄ = 2.4 × 10-5 h3 Mpc 3 ,2i.e., about four times the mean space density of R ≥ 1 Abell clusters. The spatial correlation function for our redshift sample can be approximated by ξcc(s) = (r0/s)2 with r0 = 12.9 ± 1.4 h-1 Mpc. The correlation length for the 93 richest clusters in our sample is r0 = 14 ± 4 h-1 Mpc. These results are consistent with the amplitude for ξcc expected in the standard cold dark matter model on scales ≲10 h-1 Mpc and are lower than the amplitude (r0 ∼ 25 h-1 Mpc) found by Bahcall and Soneira from the Abell catalog. However, our results indicate more clustering than expected in the standard cold dark matter model on scales ≲ 10 h-1 Mpc. We argue that the APM cluster catalog is more homogeneous than the Abell sample, and we demonstrate that our redshift-space correlation function is free from spurious large-scale anisotropies and is compatible with small (≳500 km s-1) cluster peculiar velocities. |
| spellingShingle | Dalton, G Efstathiou, G Maddox, S Sutherland, W Spatial correlations in a redshift survey of apm galaxy clusters |
| title | Spatial correlations in a redshift survey of apm galaxy clusters |
| title_full | Spatial correlations in a redshift survey of apm galaxy clusters |
| title_fullStr | Spatial correlations in a redshift survey of apm galaxy clusters |
| title_full_unstemmed | Spatial correlations in a redshift survey of apm galaxy clusters |
| title_short | Spatial correlations in a redshift survey of apm galaxy clusters |
| title_sort | spatial correlations in a redshift survey of apm galaxy clusters |
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