X-ray Properties of Intermediate-Redshift Groups of Galaxies

Abstract

We have undertaken a multiwavelength project to study the relatively unknown properties of groups and poor clusters of galaxies at intermediate redshifts. In this paper, we describe the XMM-Newton observations of six X-ray selected groups with 0.2<z<0.6. The X-ray properties of these systems are generally in good agreement with the properties of low-redshift groups. They appear to follow the scaling relations between luminosity, temperature, and velocity dispersion defined by low-redshift groups and clusters. The X-ray emission in four of the six groups is also centered on a dominant early-type galaxy. The lack of a bright elliptical galaxy at the peak of the group X-ray emission is rare at low-redshifts, and the other two groups may be less dynamically evolved. We find indications of excess entropy in these systems over self-similar predictions out to large radii. We also confirm the presence of at least one X-ray luminous AGN associated with a group member galaxy and find several other potential group AGN.

arXiv comment31 pages, 13 figures, accepted to ApJ for version with full resolution figures see http://www.ociw.edu/~tesla/midzgroups.ps.gz

References in corpus (53)

• Properties of the Intracluster Medium in an Ensemble of Nearby Galaxy Clusters
• The Lx-T Relation and Temperature Function for Nearby Clusters Revisited
• The Imprint of Galaxy Formation on X-ray Clusters
• The Lx-T Relation and Intracluster Gas Fractions of X-ray Clusters
• The Evolution of X-ray Clusters and the Entropy of the Intra Cluster Medium
• Resolving the extragalactic hard X-ray background
• An investigation of cooling flows and general cluster properties from an X-ray image deprojection analysis of 207 clusters of galaxies
• X-ray background measurements with XMM-Newton EPIC
• The ROSAT Deep Cluster Survey: the X-ray Luminosity Function out to z=0.8
• The Chandra Deep Field North Survey. V. 1 Ms Source Catalogs
• The resolved fraction of the Cosmic X-ray Background
• The GEMS project: X-ray analysis and statistical properties of the group sample
• A ROSAT survey of Hickson's compact galaxy groups
• The Birmingham-CfA cluster scaling project - III: entropy and similarity in galaxy systems
• The intragroup medium in loose groups of galaxies
• The Properties of Poor Groups of Galaxies: II. X-ray and Optical Comparisons
• The entropy and energy of intergalactic gas in galaxy clusters
• The XMM-Newton EPIC Background: Production of Background Maps and Event Files
• New Results from the X-ray and Optical Survey of the Chandra Deep Field South: The 300ks Exposure
• An X-ray Atlas of Groups of Galaxies
• Scaling laws in X-ray Galaxy Clusters at redshift between 0.4 and 1.3
• Regulation of the X-ray luminosity of clusters of galaxies by cooling and supernova feedback
• Pre-Heated Isentropic Gas in Groups of Galaxies
• Physical Implications of the X-ray Properties of Galaxy Groups and Clusters
• Measuring Cluster Temperature Profiles with XMM/EPIC
• Explaining the entropy excess in clusters and groups of galaxies without additional heating
• The effect of radiative cooling on the X-ray properties of galaxy clusters
• Spectroscopic Confirmation of a Large AGN Population in Clusters of Galaxies
• The Luminosity-Temperature Relation for Groups and Clusters of Galaxies
• The Entropy-Driven X-ray Evolution of Galaxy Clusters
• The effect of radiative cooling on scaling laws of X-ray groups and clusters
• Heating of Intergalactic Gas and Cluster Scaling Relations
• Galaxy Groups at 0.3 <= z <= 0.55. I. Group Properties
• X-Ray Scaling Relations of Galaxy Groups in a Hydrodynamic Cosmological Simulation
• Are X-ray properties of loose groups different from those of compact groups?
• Heating of the intracluster medium by quasar outflows
• XMM-Newton EPIC background modeling for extended sources
• Galaxy Groups at 0.3 <= z <= 0.55. II. Evolution to z ~ 0
• The Origin of the Spatial Distribution of X-ray luminous AGN in Massive Galaxy Clusters
• ASCA observations of groups at radii of low overdensity. Implications for the cosmic preheating
• The discovery of two new galaxy-galaxy lenses from the SDSS
• Chandra study of an overdensity of X-ray sources around two distant (z~0.5) clusters
• X-ray Selected Intermediate-Redshift Groups of Galaxies
• The Properties of the Hot Gas in Galaxy Groups and Clusters from 1-D Hydrodynamical Simulations -- I. Cosmological Infall Models
• Competition between shocks and entropy floor : unifying groups and clusters of galaxies
• X-ray source overdensities in Chandra distant cluster fields: a new probe to map the cosmic tapestry?
• Chandra Observations of Unresolved X-ray Sources around two Clusters of Galaxies
• The Effect of radiative cooling on the scale-dependence of global stellar and gas contents of groups and clusters of galaxies
• AGN heating, thermal conduction and Sunyaev-Zeldovich effect in galaxy groups and clusters
• Chandra view of the dynamically young cluster of galaxies A1367 II. point sources
• Chandra Observations of low velocity dispersion groups
• XMM-Newton observations of two X-ray bright galaxy groups - pushing out to r_500
• The detection and X-ray evolution of galaxy groups at high redshift

Cited by in corpus (33)

• Gas entropy in a representative sample of nearby X-ray galaxy clusters (REXCESS): relationship to gas mass fraction
• Scaling relations in fossil galaxy groups
• The dynamical state of brightest cluster galaxies and the formation of clusters
• Lost but not Forgotten: Intracluster Light in Galaxy Groups and Clusters
• The Mass Assembly of Fossil Groups of Galaxies in the Millennium Simulation
• Scaling Properties of Galaxy Groups
• The roadmap for unification in galaxy group selection:. I. A search for extended X-ray emission in the CNOC2 survey
• Hot Gas Halos in Early-Type Field Galaxies
• PS1-12sk is a Peculiar Supernova From a He-rich Progenitor System in a Brightest Cluster Galaxy Environment
• Active Galactic Nuclei in Groups and Clusters of Galaxies: Detection and Host Morphology
• The Evolution of Galaxies in X-ray Luminous Groups
• The Gravitational Lens -- Galaxy Group Connection. II. Groups Associated with B2319+051 and B1600+434
• Galaxy And Mass Assembly (GAMA): Gas Fuelling of Spiral Galaxies in the Local Universe I. - The Effect of the Group Environment on Star Formation in Spiral Galaxies
• Differences in the AGN Populations of Groups and Clusters: Clues to AGN Evolution
• Finding Fossil Groups: Optical Identification and X-ray Confirmation
• The X-ray Properties of Moderate-redshift Galaxy Groups Selected by Association with Gravitational Lenses
• Chandra point-source counts in distant galaxy clusters
• J0454-0309: Evidence for a strong lensing fossil group falling into a poor galaxy cluster
• Groups of Galaxies in AEGIS: The 200 ksec Chandra Extended X-ray Source catalogue
• SARCS strong lensing galaxy groups: I - optical, weak lensing, and scaling laws
• Five new INTEGRAL unidentified hard X-Ray sources uncovered by Chandra
• The mass distribution of a moderate redshift galaxy group and brightest group galaxy from gravitational lensing and kinematics
• Evolution of the X-ray Profiles of Poor Clusters from the XMM-LSS Survey
• Witnessing the formation of a galaxy cluster at z=0.485: optical and X-ray properties of RX J1117.4+0743 ([VMF 98] 097)
• Low X-Ray Luminosity Galaxy Clusters. II. Optical properties and morphological content at 0.18 < z < 0.70
• Serendipitous XMM-Newton discovery of a cluster of galaxies at z=0.28
• XMM-Newton observation of the cluster ZW 1305.4+2941 in the field SA 57
• Detection of a hot intergalactic medium in the spiral-only compact group SCG0018-4854
• Superdisks and the structural asymmetry of radio galaxies
• RXJ1648.7+6109: Witnessing the Formation of a Massive Group/Poor Cluster and its Brightest Galaxy
• Towards understanding feedback from supermassive black holes using convolutional neural networks
• Low X-Ray Luminosity Galaxy Clusters: Main goals, sample selection, photometric and spectroscopic observations
• The X-ray View of Abell 3120