J/A+A/542/A36 Rich clusters from SDSS DR8 (Einasto+, 2012)
Multimodality of rich clusters from the SDSS DR8 within the supercluster-void network. Einasto M., Liivamaegi L.J., Tempel E., Saar E., Vennik J., Nurmi P., Gramann M., Einasto J., Tago E., Heinaemaeki P., Ahvensalmi A., Martinez V.J. <Astron. Astrophys., 542, A36-36 (2012)> =2012A&A...542A..36E
ADC_Keywords: Galaxy catalogs; Clusters, galaxy Keywords: large-scale structure of Universe - galaxies: clusters: general Abstract: The study of the properties of galaxy clusters and their environment gives us information about the formation and evolution of galaxies, groups and clusters, and larger structures - superclusters of galaxies and the whole cosmic web. We study the relations between the multimodality of galaxy clusters drawn from the SDSS DR8 and the environment where they reside. As cluster environment we consider the global luminosity density field, supercluster membership, and supercluster morphology. Description: We use 3D normal mixture modelling, the Dressler-Shectman test, and the peculiar velocity of cluster main galaxies as signatures of multimodality of clusters. We calculate the luminosity density field to study the environmental densities around clusters, and to find superclusters where clusters reside. We determine the morphology of superclusters with the Minkowski functionals and compare the properties of clusters in superclusters of different morphology. We apply principal component analysis to study the relations between the multimodality parameters of clusters and their environment simultaneously. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 92 109 Data on clusters table6.dat 71 50 Data on superclusters
See also: J/A+AS/123/119 : The supercluster-void network. I. (Einasto+ 1997) J/AJ/122/2222 : Superclusters of Abell and X-ray clusters (Einasto+, 2001) J/A+A/459/L1 : Supercluster sample from SDSS DR4 (Einasto+, 2006) J/AN/327/365 : Clusters and groups of galaxies in 2dF (Tago+, 2006) J/A+A/462/811 : Superclusters of galaxies from 2dF (Einasto+, 2007) J/A+A/479/927 : Group of galaxies in SDSS 5 (Tago+, 2008) J/A+A/514/A102 : SDSS DR7 groups of galaxies (Tago+, 2010) J/A+A/540/A106 : SDSS-DR8 groups and clusters of galaxies (Tempel+, 2012) J/A+A/539/A80 : SDSS DR7 superclusters. The catalogues (Liivamagi+, 2012) Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Seq ID of cluster 7- 9 I3 --- Ngal Number of galaxies in the cluster 11- 13 I3 10+10Lsun Ltot Total luminosity of the cluster, (in 1010h-2Lsun) 15- 18 I4 km/s sigma rms velocity of the cluster σ 20- 23 F4.2 Mpc rvir Virial radius of the cluster (in Mpc/h) 25- 29 I5 km/s Vpec Peculiar velocity of the main galaxy 31 I1 --- Nc Number of components in the cluster 33 A1 --- l_pDS Limit flag on pDS 34- 39 F6.4 --- pDS p-value of the Δ test (Dressler-Shectman test, 1988AJ.....95..985D) 41- 46 F6.1 --- D4 ?=-999 Environmental density around the cluster, at smoothing lengths 4Mpc/h (1) 48- 53 F6.1 --- D8 ?=-999 Environmental density around the cluster, at smoothing lengths 8Mpc/h (1) 55- 60 F6.1 --- D16 ?=-999 Environmental density around the cluster, at smoothing lengths 16Mpc/h (1) 62- 65 I4 --- ID8 [0/1295]?=0 ID of the supercluster where the cluster resides in table6 67- 92 A26 --- Abell Abell ID(s) of the cluster
Note (1): in units of the mean density; -999 denotes cluster at the edge of a survey where the density cannot be calculated).
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 12 A12 --- IDscl Long ID of a supercluster AAA+BBB+ZZZZ (1) 14- 17 I4 --- ID8 ID of a supercluster from the SDSS DR8 superclusters catalogue 19- 22 I4 --- ID7 ID of a supercluster from the SDSS DR7 superclusters catalogue (Liivamagi et al., 2012, Cat. J/A+A/539/A80) 24- 27 I4 --- Ngal Number of galaxies in the supercluster 29- 31 I3 Mpc Dist Distance of supercluster (in Mpc/h) 33- 36 I4 10+10Lsun Ltot Total weighted luminosity of galaxies in the supercluster (in 10+10h-2^Lsun) 38- 41 F4.1 --- Dpeak Density at the density maximum, in units of mean density 43- 46 F4.1 --- V3 Maximum value of the fourth Minkowski functional V3 (clumpiness) for the supercluster 48- 52 F5.2 --- K1 Shapefinders K1 (planarity) for the full supercluster 54- 58 F5.2 --- K2 Shapefinders K2 (filamentarity) for the full supercluster 60- 65 F6.2 --- K1/K2 Ratio of the shapefinders K1/K2 for the full supercluster 67 A1 --- Mt [FS] Morphological type of a supercluster (Filament or Spider) 69- 71 I3 --- SCl ? Supercluster ID in the catalogue by Einasto et al. (2001, Cat. J/AJ/122/2222) (2)
Note (1): where AAA is RA, ±BBB is Dec (in degrees), and ZZZZ is 1000z Note (2): Peculiar superclusters: * SCl 160: the Hercules supercluster, * SCl 111 and SCl 126: members of the Sloan Great Wall, * SCl 158: the Corona Borealis supercluster, * SCl 138: the Bootes supercluster, * SCl 336: the Ursa Major supercluster.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Jul-2012
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|