Boosting the evolutionary picture of Cl 0024+17 and MS 0451-03: A case study at intermediate-redshift

Abstract

In this work we improve the dynamic-evolutionary framework of two massive clusters at intermediate redshifts: Cl 0024+17 at $z\sim 0.4$ and MS 0451-03 at $z\sim 0.5$. The spectroscopic galaxy members were selected from Moran et al. (2007a), which combine optical and UV imaging with spectroscopy. Using a set of dynamic estimators with different approaches, our results show that both Cl 0024+17 and MS 0451-03 are non-relaxed systems with distinct dynamical configurations. Cl 0024+17 exhibits a disturbed kinematics, displaying significant gaps and a velocity dispersion profile suggesting a merger. This is confirmed by the presence of previously reported substructures and new ones identified in this study. MS 0451-03 appears less disturbed than Cl 0024+17, indicating by the significant segregation between late and early-type galaxies, with the latter occupying more central regions of the projected phase-space. However, five previously unobserved substructures and non-Gaussianity in the velocity distribution indicate that MS 0451-03 is also out of equilibrium. In both clusters, there are substructures infalling onto the systems, indicating key moments in their assembly histories and potential effects on the pre-processing of galaxies within these subgroups. This is suggested by the high percentage of early-type galaxies outside $R_{200}$ (approximately $83\%$) in the case of CL 0024+17. This work reinforces the importance of more detailed dynamical analysis of clusters to better characterize their evolutionary picture.

Accepted for publication in MNRAS, 16 pages, 11 Figures

References in corpus (36)

• Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
• The relation between velocity dispersion and mass in simulated clusters of galaxies: dependence on the tracer and the baryonic physics
• LoCuSS: The slow quenching of star formation in cluster galaxies and the need for pre-processing
• BUDHIES II: A phase-space view of HI gas stripping and star-formation quenching in cluster galaxies
• A Wide-field Survey of Two Z~0.5 Galaxy Clusters: Identifying the Physical Processes Responsible for the Observed Transformation of Spirals into S0s
• The redshift evolution of massive galaxy clusters in the MACSIS simulations
• The universal distribution of halo interlopers in projected phase space. Bias in galaxy cluster concentration and velocity anisotropy?
• The Rest-Frame Optical Luminosity Function of Cluster Galaxies at z<0.8 and the Assembly of the Cluster Red Sequence
• Internal dynamics of the radio-halo cluster A2744
• The concentration-mass relation of clusters of galaxies from the OmegaWINGS survey
• The pre-processing of subhaloes in SDSS groups and clusters
• Morphological Fractions of Galaxies in WINGS Clusters: revisiting the Morphology-Density Paradigm
• NoSOCS in SDSS. VI. The Environmental Dependence of AGN in Clusters and Field in the Local Universe
• XMM-Newton study of the lensing cluster of galaxies CL0024+17
• Internal dynamics of the massive cluster Abell 697: a multiwavelength analysis
• Accretion of Galaxy Groups into Galaxy Clusters
• Investigating the Relation between Galaxy Properties and the Gaussianity of the Velocity Distribution of Groups and Clusters
• The Role of Groups in Galaxy Evolution: compelling evidence of pre-processing out to the turnaround radius of clusters
• Physical properties of the X-ray gas as a dynamical diagnosis for galaxy clusters
• Structural and dynamical modeling of WINGS clusters. I. The distribution of cluster galaxies of different morphological classes within regular and irregular clusters
• A Line-Of-Sight Galaxy Cluster Collision: Simulated X-Ray Observations
• From Blue Cloud to Red Sequence: Evidence of Morphological Transition Prior to Star Formation Quenching
• Connecting optical and X-ray tracers of galaxy cluster relaxation
• Deep spectroscopy of nearby galaxy clusters: II. The Hercules cluster
• Investigating the Projected Phase Space of Gaussian and Non-Gaussian Clusters
• The distribution of dark matter and gas spanning six megaparsecs around the post-merger galaxy cluster MS0451-03
• Pre- and post-processing of cluster galaxies out to $5\times R_{200}$: The extreme case of A2670
• The dynamical state of Abell 2399: a bullet-like cluster
• The Shape of Velocity Dispersion Profiles and the Dynamical State of Galaxy Clusters
• Global structure of the Local Universe according to 2MRS survey
• Measuring the physical imprints of gas flows in galaxies I: Accretion rate histories
• Substructures in galaxy clusters: a comparative X-ray and photometric analysis of the REXCESS sample
• Biases in the estimation of velocity dispersions and dynamical masses for galaxy clusters
• Late growth of early-type galaxies in low-z massive clusters
• Probing clustering features around Cl 0024+17
• Cluster--Galaxy Interactions in Coma