An X-ray Selected Galaxy Cluster at z=1.26
Preprint
- 25 March 1999
Abstract
We report the discovery of an X-ray luminous galaxy cluster at z=1.26. RXJ0848.9+4452 was selected as an X-ray cluster candidate in the ROSAT Deep Cluster Survey, on the basis of its spatial extent. Deep optical and near-IR imaging have revealed a galaxy overdensity around the peak of the X-ray emission, with a significant excess of red objects with J-K colors typical of elliptical galaxies at z>1. Spectroscopic observations at the Keck II telescope have secured 6 galaxy redshifts in the range 1.2571.Keywords
All Related Versions
- Version 1, 1999-03-25, ArXiv
- Published version: The Astronomical Journal, 118 (1), 76.
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