10 papers · 1 filter
Clusters of Galaxies as Self-Gravitating Systems
Florence Durret, Ricardo Demarco, Frederic Magnard +1
Self-gravitating systems such as elliptical galaxies appear to have a constant specific entropy and obey a scaling law relating their potential energy to their mass. These properti…
Optical and X-ray analysis of the cluster of galaxies Abell 496
F. Durret, C. Adami, D. Gerbal +1
We present a detailed analysis of the cluster of galaxies \a4. The optical data include a redshift catalogue of 466 galaxies, out of which 274 belong to the main cluster and a CCD…
Gravo-thermal properties and formation of elliptical galaxies
I. Marquez, G. B. Lima Neto, H. Capelato +2
We have analyzed a sample of galaxies belonging to three clusters: Coma, Abell 85, and Abell 496 (real galaxies) and a sample of simulated elliptical galaxies formed in a hierarchi…
A multi-wavelength analysis of the cluster of galaxies ABCG 194
Elena Nikogossyan, Florence Durret, Daniel Gerbal +1
(Abridged) We present a morphological and structural analysis of the Richness zero cluster ABCG 194, known as a ``linear cluster'', based on a catalogue of 97 galaxies with B magni…
The rich cluster of galaxies ABCG 85. III. Analyzing the ABCG 85/87/89 complex
F. Durret, W. Forman, D. Gerbal +2
We present a combined X-ray and optical analysis of the ABCG 85/87/89 complex of clusters of galaxies, based on the ROSAT PSPC image, optical photometric catalogues (Slezak et al.…
The rich cluster of galaxies ABCG 85. II. X-ray analysis using the ROSAT HRI
G. B. Lima Neto, V. Pislar, F. Durret +2
We present a new X-ray analysis mainly based on ROSAT HRI data. The HRI spatial resolution combined with an improved wavelet analysis method and with complementary radio and optica…