The Velocity Dispersion of MS 1054−03: A Massive Galaxy Cluster at High Redshift
نویسندگان
چکیده
منابع مشابه
Molecular gas in the halo fuels the growth of a massive cluster galaxy at high redshift.
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We present results from a dynamical study of the high redshift, massive, X-ray luminous galaxy cluster MS1054–03. We significantly increase the number of confirmed cluster members by adding 20 to an existing set of twelve; using the confirmed members, we estimate MS1054–03’s redshift, velocity dispersion, and mass. We find that z = 0.8329 ± 0.0017, σ = 1170 ± 150 km/s, and the central mass is a...
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We report the discovery of XMMXCS J2215.9 1738, a massive galaxy cluster at , which was found z p 1.45 in the XMM Cluster Survey. The cluster candidate was initially identified as an extended X-ray source in archival XMM data. Optical spectroscopy shows that six galaxies within a ∼60 diameter region lie at . z p 1.45 0.01 Model fits to the X-ray spectra of the extended emission yield keV (90% c...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1999
ISSN: 0004-637X,1538-4357
DOI: 10.1086/307624