DISCOVERY AND COSMOLOGICAL IMPLICATIONS OF SPT-CL J2106-5844, THE MOST MASSIVE KNOWN CLUSTER AT <i>z</i> &gt; 1

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dc.contributor.authorFoley, R. J.
dc.contributor.authorAndersson, K.
dc.contributor.authorBazin, G.
dc.contributor.authorde Haan, T.
dc.contributor.authorRuel, J.
dc.contributor.authorAde, P. A. R.
dc.contributor.authorAird, K. A.
dc.contributor.authorArmstrong, R.
dc.contributor.authorAshby, M. L. N.
dc.contributor.authorBautz, M.
dc.contributor.authorBenson, B. A.
dc.contributor.authorBleem, L. E.
dc.contributor.authorBonamente, M.
dc.contributor.authorBrodwin, M.
dc.contributor.authorCarlstrom, J. E.
dc.contributor.authorChang, C. L.
dc.contributor.authorClocchiatti, A.
dc.contributor.authorCrawford, T. M.
dc.contributor.authorCrites, A. T.
dc.contributor.authorDesai, S.
dc.contributor.authorDobbs, M. A.
dc.contributor.authorDudley, J. P.
dc.contributor.authorFazio, G. G.
dc.contributor.authorForman, W. R.
dc.contributor.authorGarmire, G.
dc.contributor.authorGeorge, E. M.
dc.contributor.authorGladders, M. D.
dc.contributor.authorGonzalez, A. H.
dc.contributor.authorHalverson, N. W.
dc.contributor.authorHigh, F. W.
dc.contributor.authorHolder, G. P.
dc.contributor.authorHolzapfel, W. L.
dc.contributor.authorHoover, S.
dc.contributor.authorHrubes, J. D.
dc.contributor.authorJones, C.
dc.contributor.authorJoy, M.
dc.contributor.authorKeisler, R.
dc.contributor.authorKnox, L.
dc.contributor.authorLee, A. T.
dc.contributor.authorLeitch, E. M.
dc.contributor.authorLueker, M.
dc.contributor.authorLuong-Van, D.
dc.contributor.authorMarrone, D. P.
dc.contributor.authorMcMahon, J. J.
dc.contributor.authorMehl, J.
dc.contributor.authorMeyer, S. S.
dc.contributor.authorMohr, J. J.
dc.contributor.authorMontroy, T. E.
dc.contributor.authorMurray, S. S.
dc.contributor.authorPadin, S.
dc.contributor.authorPlagge, T.
dc.contributor.authorPryke, C.
dc.contributor.authorReichardt, C. L.
dc.contributor.authorRest, A.
dc.contributor.authorRuhl, J. E.
dc.contributor.authorSaliwanchik, B. R.
dc.contributor.authorSaro, A.
dc.contributor.authorSchaffer, K. K.
dc.contributor.authorShaw, L.
dc.contributor.authorShirokoff, E.
dc.contributor.authorSong, J.
dc.contributor.authorSpieler, H. G.
dc.contributor.authorStalder, B.
dc.contributor.authorStanford, S. A.
dc.contributor.authorStaniszewski, Z.
dc.contributor.authorStark, A. A.
dc.contributor.authorStory, K.
dc.contributor.authorStubbs, C. W.
dc.contributor.authorVanderlinde, K.
dc.contributor.authorVieira, J. D.
dc.contributor.authorVikhlinin, A.
dc.contributor.authorWilliamson, R.
dc.contributor.authorZenteno, A.
dc.date.accessioned2025-01-21T00:02:23Z
dc.date.available2025-01-21T00:02:23Z
dc.date.issued2011
dc.description.abstractUsing the South Pole Telescope (SPT), we have discovered the most massive known galaxy cluster at z > 1, SPT-CL J2106-5844. In addition to producing a strong Sunyaev-Zel'dovich (SZ) effect signal, this system is a luminous X-ray source and its numerous constituent galaxies display spatial and color clustering, all indicating the presence of a massive galaxy cluster. Very Large Telescope and Magellan spectroscopy of 18 member galaxies shows that the cluster is at z = 1.132(-0.003)(+0.002). Chandra observations obtained through a combined HRC-ACIS GTO program reveal an X-ray spectrum with an Fe K line redshifted by z = 1.18 +/- 0.03. These redshifts are consistent with the galaxy colors found in optical, near-infrared, and mid-infrared imaging. SPT-CL J2106-5844 displays extreme X-ray properties for a cluster having a core-excluded temperature of T-X = 11.0(-1.9)(+2.6) keV and a luminosity (within r(500)) of L-X(0.5-2.0 keV) = (13.9 +/- 1.0) x 10(44) erg s(-1). The combined mass estimate from measurements of the SZ effect and X-ray data is M-200 = (1.27 +/- 0.21) x 10(15) h(70)(-1) M-circle dot. The discovery of such amassive gravitationally collapsed system at high redshift provides an interesting laboratory for galaxy formation and evolution, and is a probe of extreme perturbations of the primordial matter density field. We discuss the latter, determining that, under the assumption of Lambda CDM cosmology with only Gaussian perturbations, there is only a 7% chance of finding a galaxy cluster similar to SPT-CL J2106-5844 in the 2500 deg(2) SPT survey region and that only one such galaxy cluster is expected in the entire sky.
dc.fuente.origenWOS
dc.identifier.doi10.1088/0004-637X/731/2/86
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.1088/0004-637X/731/2/86
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95422
dc.identifier.wosidWOS:000289779600009
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectearly universe
dc.subjectgalaxies: clusters: individual (SPT-CL J2106-5844)
dc.subjectgalaxies: evolution
dc.subjectgalaxies: formation
dc.subjectlarge-scale structure of universe
dc.titleDISCOVERY AND COSMOLOGICAL IMPLICATIONS OF SPT-CL J2106-5844, THE MOST MASSIVE KNOWN CLUSTER AT <i>z</i> &gt; 1
dc.typeartículo
dc.volumen731
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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