Low X-Ray Luminosity Galaxy Clusters. II. Optical properties and morphological content at 0.18 < z < 0.70

Abstract

This is the second of a series of papers on low X-ray luminosity galaxy clusters, in which we present the $r^{\prime }$, $g^{\prime }$ and $i^{\prime }$ photometry obtained with GMOS-IMAGE at Gemini North and South telescopes for seven systems in the redshift range of 0.18 to 0.70. Optical magnitudes, colours and morphological parameters, namely, concentration index, ellipticity and visual morphological classification, are also given. At lower redshifts, the presence of a well-defined red cluster sequence extending by more than 4 magnitudes showed that these intermediate-mass clusters had reached a relaxed stage. This was confirmed by the small fraction of blue galaxy members observed in the central regions of $\sim$ 0.75 Mpc. In contrast, galaxy clusters at higher redshifts had a less important red cluster sequence. We also found that the galaxy radial density profiles in these clusters were well fitted by a single power law. At 0.18 $<$ z $<$ 0.70, we observed an increasing fraction of blue galaxies and a decreasing fraction of lenticulars, with the early-type fraction remaining almost constant. Overall, the results of these intermediate-mass clusters are in agreement with those for high mass clusters.

16 pages, 13 figures, 5 tables. Accepted for publication in MNRAS

References in corpus (13)

• Ages and metallicities of early-type galaxies in the SDSS: new insight into the physical origin of the colour-magnitude and the Mg2-sigmaV relations
• A GMBCG Galaxy Cluster Catalog of 55,424 Rich Clusters from SDSS DR7
• The Structures of Distant Galaxies I: Galaxy Structures and the Merger Rate to z~3 in the Hubble Ultra-Deep Field
• The build-up of the colour-magnitude relation in galaxy clusters since z~0.8
• Evolution of the Color-Magnitude Relation in Galaxy Clusters at z ~1 from the ACS Intermediate Redshift Cluster Survey
• Evolution of the Color-Magnitude relation in High-Redshift Clusters: Early-type Galaxies in the Lynx Supercluster at z~1.26
• Internal dynamics of the radio-halo cluster A2744
• The Red-Sequence Luminosity Function in Galaxy Clusters since z~1
• Cluster Abell 520: a perspective based on member galaxies. A cluster forming at the crossing of three filaments?
• X-ray Properties of Intermediate-Redshift Groups of Galaxies
• Exploring the Diversity of Groups at 0.1<z<0.8 with X-ray and Optically Selected Samples
• The Dwarf Galaxy Population in Nearby Groups. The data
• Witnessing the formation of a galaxy cluster at z=0.485: optical and X-ray properties of RX J1117.4+0743 ([VMF 98] 097)

Cited by in corpus (8)

• Searching for Extragalactic Sources in the VISTA Variables in the Vía Láctea Survey
• Low X-ray Luminosity Galaxy Clusters. III: Weak Lensing Mass Determination at 0.18 $<$ z $<$ 0.70
• A morphological study of galaxies in ZwCl0024+1652, a galaxy cluster at redshift z $\sim$ 0.4
• Measuring the Total Ultraviolet Light from Galaxy Clusters at z=0.5-1.6: The Balance of Obscured and Unobscured Star-Formation
• The effect of dynamical states on galaxy clusters populations. I. Classification of dynamical states
• Optical Confirmation of X-ray selected Galaxy clusters from the Swift AGN and Cluster survey with MDM and Pan-STARRS Data (Paper III)
• The Swift AGN and Cluster Survey. II. Cluster Confirmation with SDSS Data
• Low X-Ray Luminosity Galaxy Clusters: Main goals, sample selection, photometric and spectroscopic observations