Discovery of an X-Ray-luminous Galaxy Cluster at z = 1.4 | Zendy

C. R. Mullis | Zendy; P. Rosati | Zendy; G. Lamer | Zendy; H. Böhringer | Zendy; A. Schwope | Zendy; P. Schuecker | Zendy; R. Fassbender | Zendy

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Discovery of an X-Ray-luminous Galaxy Cluster at z = 1.4

Author(s) -

C. R. Mullis,

P. Rosati,

G. Lamer,

H. Böhringer,

A. Schwope,

P. Schuecker,

R. Fassbender

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/429801

Subject(s) - physics , astrophysics , redshift , galaxy , galaxy cluster , cluster (spacecraft) , velocity dispersion , brightest cluster galaxy , astronomy , sky , luminosity , computer science , programming language

We report the discovery of a massive, X-ray-luminous cluster of galaxies atz=1.393, the most distant X-ray-selected cluster found to date. XMMUJ2235.3-2557 was serendipitously detected as an extended X-ray source in anarchival XMM-Newton observation of NGC 7314. VLT-FORS2 R and z band snapshotimaging reveals an over-density of red galaxies in both angular and colorspaces. The galaxy enhancement is coincident in the sky with the X-rayemission; the cluster red sequence at R-z ~ 2.1 identifies it as ahigh-redshift candidate. Subsequent VLT-FORS2 multi-object spectroscopyunambiguously confirms the presence of a massive cluster based on 12 concordantredshifts in the interval 1.381 cluster found with XMM-Newton,the relative ease and efficiency of discovery demonstrates that it should bepossible to build large samples of z>1 clusters through the joint use of X-rayand large, ground-based telescopes.

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