The structure of the merging RCS 231953+00 supercluster at z ~ 0.9
- Faloon, A. J.
- Webb, T. M. A.
- Ellingson, E.
- Yan, R.
- Gilbank, David G.
- Geach, J. E.
- Noble, A. G.
- Barrientos, L. F.
- Yee, H. K. C.
- Gladders, M.
- Richard, J.
DOIAbstract
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 predicte...
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