SIMBAD references

1999ApJ...522...39T - Astrophys. J., 522, 39-45 (1999/September-1)

The velocity dispersion of MS 1054-03: a massive galaxy cluster at high redshift.

TRAN K.-V., KELSON D.D., VAN DOKKUM P., FRANX M., ILLINGWORTH G.D. and MAGEE D.

Abstract (from CDS):

We present results from a dynamical study of the high-redshift, massive, X-ray-luminous galaxy cluster MS 1054-03. We significantly increase the number of confirmed cluster members by adding 20 to an existing set of 12; using the confirmed members, we estimate MS 1054-03's redshift, velocity dispersion, and mass. We find that z=0.8329±0.0017, σ=1170±150 km.s–1, and the central mass is approximately 1.9±0.5x1015 h–1 M (within R=1 h–1 Mpc; H0=100 h km.s–1.Mpc–1, q0=0.5). MS 1054-03 is one of a handful of high-redshift (z>0.5) clusters known that also has X-ray and weak-lensing observations; we find our dynamical mass agrees with mass estimates from both studies. The confirmation of MS 1054-03 as a massive cluster at z∼0.8 is consistent with an open (ΩM∼0.3) or flat, Λ-dominated (ΩMΛ=1) universe. In addition, we compare MS 1054-03's velocity dispersion and X-ray temperature to a sample of low- and intermediate-redshift galaxy clusters to test for evolution in the σ-TX relation; we find no evidence for evolution in this relation to z∼0.8.

Abstract Copyright:

Journal keyword(s): Cosmology: Observations - galaxies: clusters: individual (MS 1054-0321) - Cosmology: Large-Scale Structure of Universe

Nomenclature: Table 1: [VFK98] NNNN N=24 among (Nos 696-1986).

Status at CDS:  

CDS comments: MS 1054-03 = ClG 1054-03 = 1E 1054.4-0321. T.1: objects 1st created as [TKV99], but they are objects from the same catalogue of 1998ApJ...504L..17V.

Simbad objects: 39

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