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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The discovery of a massive supercluster at z=0.9 in the UKIDSS Deep eXtragalactic Survey
AU - Swinbank, A. M.
AU - Edge, A. C.
AU - Smail, Ian
AU - Stott, J. P.
AU - Bremer, M.
AU - Sato, Y.
AU - van Breukelen, C.
AU - Jarvis, M.
AU - Waddington, I.
AU - Clewley, L.
AU - Bergeron, J.
AU - Cotter, G.
AU - Dye, S.
AU - Geach, J. E.
AU - Gonzalez-Solares, E.
AU - Hirst, P.
AU - Ivison, R. J.
AU - Rawlings, S.
AU - Simpson, C.
AU - Smith, G. P.
AU - Verma, A.
AU - Yamada, T.
PY - 2007/8/21
Y1 - 2007/8/21
N2 - We analyse the first publicly released deep field of the UK Infrared Deep Sky Survey (UKIDSS) Deep eXtragalactic Survey to identify candidate galaxy overdensities at z similar to 1 across similar to 1 deg(2) in the ELAIS-N1 field. Using I - K, J - K and K - 3.6 mu m colours, we identify and spectroscopically follow up five candidate structures with Gemini/Gemini Multi-Object Spectrograph and confirm that they are all true overdensities with between five and 19 members each. Surprisingly, all five structures lie in a narrow redshift range at z = 0.89 +/- 0.01, although they are spread across 30 Mpc on the sky. We also find a more distant overdensity at z = 1.09 in one of the spectroscopic survey regions. These five overdense regions lying in a narrow redshift range indicate the presence of a supercluster in this field and by comparing with mock cluster catalogues 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.
AB - We analyse the first publicly released deep field of the UK Infrared Deep Sky Survey (UKIDSS) Deep eXtragalactic Survey to identify candidate galaxy overdensities at z similar to 1 across similar to 1 deg(2) in the ELAIS-N1 field. Using I - K, J - K and K - 3.6 mu m colours, we identify and spectroscopically follow up five candidate structures with Gemini/Gemini Multi-Object Spectrograph and confirm that they are all true overdensities with between five and 19 members each. Surprisingly, all five structures lie in a narrow redshift range at z = 0.89 +/- 0.01, although they are spread across 30 Mpc on the sky. We also find a more distant overdensity at z = 1.09 in one of the spectroscopic survey regions. These five overdense regions lying in a narrow redshift range indicate the presence of a supercluster in this field and by comparing with mock cluster catalogues 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.
KW - galaxies : clusters : general
KW - galaxies : high-redshift
KW - LUMINOUS GALAXY CLUSTER
KW - EARLY DATA RELEASE
KW - RICH CLUSTERS
KW - CATALOG
KW - POPULATION
KW - EVOLUTION
KW - REDSHIFT
KW - XMM
KW - VELOCITIES
KW - SPECTRA
U2 - 10.1111/j.1365-2966.2007.12037.x
DO - 10.1111/j.1365-2966.2007.12037.x
M3 - Journal article
VL - 379
SP - 1343
EP - 1351
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 4
ER -