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A sample of galaxy clusters to study the fundamental plane: Redshift measurements

We present the results of spectroscopic observations of galaxies in a sample of nearby clusters. We measured galaxy redshifts and estimated cluster velocity dispersions. These observations were carried out at the Observatoire de Haute Provence as part of a program aiming at a more detailed study of the Cluster Fundamental Plane.

Mapping the hot gas temperature in galaxy clusters using X-ray and Sunyaev-Zel’dovich imaging

. Coi ard 13 B. Comis 6 A. D'Addabbo 8 10 F.-X. Désert 3 S. Doyle 12 C. Ferrari 7 J. Goupy 10 C. Kramer 9 G. Lagache 4 S. Leclercq 13 J.-F. Macías-Pérez 6 S. Maurogordato 7 P. Mauskopf 1 12 F. Mayet 6 A

Chandra observation of the multiple merger cluster Abell 521

We present the Chandra  analysis of the rich galaxy cluster Abell 521 (). The high resolution of the Chandra  observation has allowed us to refine the original merging scenario proposed for A521, and to reveal new features in its X-ray emission. A521 has strongly substructured ICM density and temperature maps. Its X-ray diffuse emission is elongated along a NW/SE direction (SX2...

The fundamental plane of galaxy clusters

The velocity dispersion σ, radius R and luminosity L of elliptical galaxies are known to be related, leaving only two degrees of freedom and defining the so-called ‘fundamental plane’. In this Letter, we present observational evidence that rich galaxy clusters exhibit a similar behaviour. Assuming a relation L ∝ Rα σ 2β, the best-fitting values of α and β are very close to those...