Astronomy and Astrophysics – Astronomy
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0904g&link_type=abstract
American Astronomical Society Meeting 204, #09.04; Bulletin of the American Astronomical Society, Vol. 36, p.792
Astronomy and Astrophysics
Astronomy
Scientific paper
We present spectroscopic confirmation and wide field imaging of the Cl 1604 supercluster at z ˜ 0.9. Originally detected as two individual clusters, Cl 1604+4304 at z = 0.90 and Cl 1604+4321 at z = 0.92, closely separated in both redshift and sky position, subsequent imaging revealed a complex of red galaxies bridging the two clusters, suggesting that the region contained a large scale structure. We have carried out extensive multi-object spectroscopy, which, combined with previous measurements, provides over 600 redshifts in this area, including ˜240 confirmed supercluster members. We detect two additional clusters that are part of this structure, Cl 1604+4314 at z = 0.87 and Cl 1604+4316 at z = 0.93. All four have properties typical of local clusters, with line-of-sight velocity dispersions between ˜500 and ˜1000 km/s. Imaging of an extended area around the supercluster is used to estimate its maximal extent.
Gal Roy R.
Lubin Lori Maxine
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