#Author Last NameAuthor First NameEmail AddressInstitutionTitleAbstractPresentationDiscussionSplinter SessionSession
1FangTaotaofangt@astro.berkeley.eduUCBChandra Observation of DEEP2 Galaxy Groups and ClustersI will present a 200 ksec Chandra observation of seven spectroscopically selected, high redshift (0.75 < z < 1.03) galaxy groups and clusters discovered by the DEEP2 Galaxy Redshift Survey in the Extended Groth Strip (EGS).oral Monday: 'Normal' Galaxies, Tuesday: Cluster Formation and Evolution5
2FinoguenovAlexisalexis@jca.umbc.eduUMBC/MPEStatistics of galaxy groups in ultradeep XMM surveys.We discuss the results of the X-ray search and optical identification of galaxy groups in several ultradeep XMM fields: COSMOS, SXDS/UDS, CDFS and CDFN, detecting a total number of 200 of groups and clusters of galaxies with identifications achieving a z of 1.5. A statistical description of the survey in terms of the cumulative log(N>S)-log(S) distribution compares well with the previous results, although yielding a somewhat higher number of clusters at similar fluxes. For the probed luminosity range of 8e42-2e44 ergs/s, these surveys are in agreement with and adds significantly to the existing data on the cluster luminosity function at high redshifts and implies no substantial evolution at these luminosities to z=1.3.oralUltradeep (equivalent to 1Ms Chandra) surveys need to be extended on the areas with best NIR data. This will bring-up the population of groups and clusters at z>1.2, important both for galaxy evolution and for constraining the faint end of the cluster luminosity function at z>1.2. XMM-Newton could provide a path-finder for those surveys.Monday: X-ray luminosity functions and evolution, Tuesday: Groups and Interactions5
3JeltemaTeslatesla@ociw.eduCarnegie ObservatoriesThe Evolution of X-ray Luminous Groups of GalaxiesWe have undertaken a multiwavelength project to study the relatively unknown properties of groups and poor clusters of galaxies at intermediate redshifts. The full sample includes nine X-ray selected groups with redshifts between 0.2 and 0.6, and our follow up includes observations with XMM, HST, Gemini, and Keck. 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. We also find indications of excess entropy in these systems over self-similar predictions out to large radii. However, the properties of the group galaxies, in particular the central galaxies, show them to be less evolved than similar groups at low-redshift. Roughly half of our intermediate-redshift groups do not have a dominant central elliptical galaxy (BGG), and three of the four BGGs contain mult! iple luminous nuclei indicating recent merging.oralI would be interested in a discussion of how large-scale structure formation (for example, cluster mergers and filamentary structure) affects observable properties. What can multiwavelength observations tell about cluster/group formation as well as galaxy evolution? In particular, what are the potential biases in the types of structures and indicators of cluster mass probed by ongoing cluster surveys in X-ray, optical, and SZ, particularly at high-redshift. Second, I would be interested in a discussion of when and in what environments the most massive galaxies in clusters and groups form.Monday: 'Normal' Galaxies, Tuesday: Cluster Formation and Evolution5
4JonesChristinecjones@cfa.harvard.eduSAO/CfAFeedback from SMBH in Galaxies and Groups based on a Chandra Survey of Early-type GalaxiesChandra images show the presense of shocks, jets, cavities and buoyant bubbles in the hot gas in galaxies and groups as well as in rich clusters. This paper will describe the effects of outbursts and the X-ray luminosities of LLAGN from a Chandra survey of 160 early-type galaxies. We find that 80 percent of galaxies have detected X-ray emission from their nuclei and that about 30 percent have detected cavities in the X-ray gas, while in two galaxies, the outbursts have removed much of the expected gaseous halos.oralDiscussion of Generating and sharing multi-wavelength catalogs for survey fields (possibly set-up working group on this)Monday: Type I and II AGN, Absorption, XBONGs, Tuesday: AGN correlation functions, LSS, environments5
5MahdaviAndishehamahdavi@uvic.caUniversity of VictoriaJACO: Simultaneous X-ray, Sunyaev-Zeldovich, and Weak Lensing Modeling of Relaxed ClustersI will discuss a method for the Joint Analysis of Cluster Observations. By combining measurements of the X-ray spectrum, gravitational lensing shear, and Sunyaev-Zel'dovich decrement for the same cluster, JACO yields powerful constraints on the distribution of baryonic and non-baryonic matter in a relaxed system. Chandra, XMM-Newton, Cosmic Background Imager, and CFHT observations of the well-studied cluster Abell 478 yield a dark matter distribution that is shallower than standard CDM models. I will preview the application of JACO to the Canadian Cluster Comparison Project, a survey of massive, intermediate-redshift systems.oralWe need a new, deep X-ray all sky survey. How can we join efforts to achieve this?Monday: X-ray luminosity functions and evolution, Tuesday: Cluster Formation and Evolution5
6MartiniPaulmartini@astronomy.ohio-state.eduOhio State UniversityAGN in Clusters of GalaxiesAGN in clusters of galaxies are commonly invoked to explain the absence of cold gas in cluster cores, although they appear to be substantially rarer in rich environments than in the field. I will present results from a Chandra study of eight low-redshift clusters that has systematically measured the AGN fraction in clusters and describe their spatial, kinematic, and host galaxy distributions. I will also briefly discuss their implications for AGN fueling, galaxy evolution, and heating the ICM.oral Monday: 'Normal' Galaxies, Tuesday: Cluster Formation and Evolution5
7NormanDaradnorman@ctio.noao.eduNOAOWeak lensing selected, X-ray confirmed galaxy clusters \& the AGN closest to themThe Deep Lens Survey (DLS) team has identified a unique sample of galaxy clusters through weak gravitational lensing shear mapping (Wittman et al. 2006). Chandra X-ray confirmation of several of these clusters has serendipitously uncovered large numbers of X-ray point sources, presumably AGN, in the fields of these clusters. We have begun a survey to characterize these AGN; determine their redshifts, luminosities and distributions relative to the mass and hot gas of the cluster environment. This study will also allow us to test the validity of assumptions made about the formation and evolution of AGN in hierarchical structure formation models.oral Monday: Type I and II AGN, Absorption, XBONGs, Tuesday: AGN correlation functions, LSS, environments5
8PierreMargueritempierre@cea.frCEA SaclayCosmological modelling of the XMM-LSS cluster sampleWe present the original construction procedure of the XMM-LSS cluster catalogue based on object classification. With more than 50 spectroscopically confirmed clusters to date (first 5 deg2), this constitutes the largest deep cluster sample over a single region. It reveals, for the first time, the group population out to a redshift of 0.5. The sample comprises also a number of clusters above z>1. The dedicated modelling of the survey selection functions allows the simultaneous cosmological fitting of dn/dz and L-T(z): the self-calibration era of cluster X-ray surveys is now open. Further prospects on constraining cluster scaling laws with our on-going multi-wavelength observations are presented.oralWhat are the most important questions left to answer? - the AGN type (cf unified scheme) vs density environement (clusters, groups, filaments, voids) Are any further X-ray surveys needed - what and why? - an all-sky survey at ~ 1E-14 along with an optical survey. What science or methods should be pushed hard and why? - photo-z What would you like to see debated at this meeting? - the time scale for the next X-ray missionsMonday: Type I and II AGN, Absorption, XBONGs, Tuesday: AGN correlation functions, LSS, environments5
9VikhlininAlexeyalexey@head.cfa.harvard.eduSAOHigh-redshift galaxy cluster surveysThis talk will focus on the present status of high-redshift cluster surveys. The available data already provides interesting cosmological constraints, highly complementary to those from CMB and SN Ia. I will also discuss the prospects for future work with Chandra and XMM, as well as with the proposed quasi all-sky X-ray surveys and experiments using other techniques.review  5