The discovery of a massive supercluster at z=0.9 in the UKIDSS DXS

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dc.creatorSwinbank, A. M.
dc.creatorEdge, A.
dc.creatorSmail, I.
dc.creatorStott, J.
dc.creatorBremer, M.
dc.creatorSato, Y.
dc.creatorvan Breukelen, C.
dc.creatorJarvis, M.
dc.creatorWaddington, I.
dc.creatorClewley, L.
dc.creatorBergeron, J.
dc.creatorCotter, G.
dc.creatorDye, S.
dc.creatorGeach, J.
dc.creatorGonzalez-Solares, E.
dc.creatorHirst, P.
dc.creatorIvison, R.
dc.creatorRawlings, S.
dc.creatorSimpson, C.
dc.creatorSmith, G. P.
dc.creatorVerma, A.
dc.creatorYamada, T.
dc.date2007-06-01
dc.date.accessioned2026-07-07T10:55:59Z
dc.date.available2026-07-07T10:55:59Z
dc.descriptionWe analyse the first publicly released deep field of the UKIDSS Deep eXtragalactic Survey (DXS) to identify candidate galaxy over-densities at z~1 across ~1 sq. degree in the ELAIS-N1 field. Using I-K, J-K and K-3.6um colours we identify and spectroscopically follow-up five candidate structures with Gemini/GMOS and confirm they are all true over-densities with between five and nineteen members each. Surprisingly, all five structures lie in a narrow redshift range at z=0.89+/-0.01, although they are spread across 30Mpc on the sky. We also find a more distant over-density at z=1.09 in one of the spectroscopic survey regions. These five over-dense regions lying in a narrow redshift range indicate the presence of a supercluster in this field and by comparing with mock cluster catalogs from N-body simulations we discuss the likely properties of this structure. Overall, we show that the properties of this supercluster are similar to the well-studied Shapley and Hercules superclusters at lower redshift.
dc.descriptionIn press at MNRAS, 11 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0706.0090
dc.identifierhttp://arxiv.org/abs/0706.0090
dc.identifierMon.Not.Roy.Astron.Soc.379:1343-1351,2007
dc.identifierdoi:10.1111/j.1365-2966.2007.12037.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186262
dc.subjectAstrophysics
dc.titleThe discovery of a massive supercluster at z=0.9 in the UKIDSS DXS
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