dc.contributor.author | Faloon, A. J. | |
dc.contributor.author | Webb, T. M. A. | |
dc.contributor.author | Ellingson, E. | |
dc.contributor.author | Yan, R. | |
dc.contributor.author | Gilbank, David G. | |
dc.contributor.author | Geach, J. E. | |
dc.contributor.author | Noble, A. G. | |
dc.contributor.author | Barrientos, L. F. | |
dc.contributor.author | Yee, H. K. C. | |
dc.contributor.author | Gladders, M. | |
dc.contributor.author | Richard, J. | |
dc.date.accessioned | 2013-06-11T13:30:51Z | |
dc.date.available | 2013-06-11T13:30:51Z | |
dc.date.issued | 2013-05-10 | |
dc.identifier.citation | Faloon , A J , Webb , T M A , Ellingson , E , Yan , R , Gilbank , D G , Geach , J E , Noble , A G , Barrientos , L F , Yee , H K C , Gladders , M & Richard , J 2013 , ' The structure of the merging RCS 231953+00 supercluster at z ~ 0.9 ' , The Astrophysical Journal , vol. 768 , no. 2 , 104 . https://doi.org/10.1088/0004-637X/768/2/104 | |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | http://hdl.handle.net/2299/10750 | |
dc.description.abstract | The RCS2319+00 supercluster is a massive supercluster at z = 0.9 comprising three optically selected, spectroscopically confirmed clusters separated by <3Mpc on the plane of the sky. This supercluster is one of a few known examples of the progenitors of present-day massive clusters (1015 M ☉ by z ~ 0.5). We present an extensive spectroscopic campaign carried out on the supercluster field resulting, in conjunction with previously published data, in 1961 high-confidence galaxy redshifts. We find 302 structure members spanning three distinct redshift walls separated from one another by ~65Mpc (Δ z = 0.03). The component clusters have spectroscopic redshifts of 0.901, 0.905, and 0.905. The velocity dispersions are consistent with those predicted from X-ray data, giving estimated cluster masses of ~10 14.5-10 14.9 M ☉. The Dressler-Shectman test finds evidence of substructure in the supercluster field and a friends-of-friends analysis identified five groups in the supercluster, including a filamentary structure stretching between two cluster cores previously identified in the infrared by Coppin etal. The galaxy colors further show this filamentary structure to be a unique region of activity within the supercluster, comprised mainly of blue galaxies compared to the ~43%-77% red-sequence galaxies present in the other groups and cluster cores. Richness estimates from stacked luminosity function fits result in average group mass estimates consistent with ~1013 M ☉ halos. Currently, 22% of our confirmed members reside in 1013 M ☉ groups/clusters destined to merge onto the most massive cluster, in agreement with the massive halo galaxy fractions important in cluster galaxy pre-processing in N-body simulation merger tree studies | en |
dc.format.extent | 21 | |
dc.format.extent | 1629457 | |
dc.language.iso | eng | |
dc.relation.ispartof | The Astrophysical Journal | |
dc.subject | RICH CLUSTERS | |
dc.subject | SEQUENCE CLUSTER SURVEY | |
dc.subject | SDSS DR7 SUPERCLUSTERS | |
dc.subject | REDSHIFT SURVEY | |
dc.subject | CL-1604 SUPERCLUSTER | |
dc.subject | COLOR-MAGNITUDE RELATION | |
dc.subject | techniques: spectroscopic | |
dc.subject | GALAXY CLUSTERS | |
dc.subject | galaxies: clusters: individual (RCS 231953+0038.0, RCS 232002+0033.4, RCS 231948+0030.1) | |
dc.subject | LUMINOSITY FUNCTION | |
dc.subject | galaxies: high-redshift | |
dc.subject | DIGITAL SKY SURVEY | |
dc.subject | RED-SEQUENCE | |
dc.title | The structure of the merging RCS 231953+00 supercluster at z ~ 0.9 | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1088/0004-637X/768/2/104 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |