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We use a sample of galaxies from the Two Micron All Sky Survey (2MASS) Extended Source Catalog to refine a matched filter method of finding galaxy clusters that takes into account each galaxy's position, magnitude, and redshift if…

宇宙学与河外天体物理 · 物理学 2012-03-08 Jeffrey A. Blackburne , Christopher S. Kochanek

We briefly review our current knowledge of the space density of distant X-ray clusters as measured by several ROSAT serendipitous surveys. We compare old and new determinations of the cluster X-ray Luminosity Function (XLF) at increasing…

天体物理学 · 物理学 2007-05-23 P. Rosati , S. Borgani , R. Della Ceca , S. A. Stanford , P. R. Eisenhardt , C. Lidman

We present the results from a shallow (2-10 ksec) XMM/2dF survey. Our survey covers 18 XMM fields ($\sim 5 {\rm deg}^2$) previously spectroscopically followed up with the Anglo-Australian telescope 2-degree field facility. About half of the…

Currently, the number of galaxy clusters identified using galaxy data has far exceeded the number derived from intracluster medium data. In this study, we used positional information from large optical cluster catalogues to search for…

星系天体物理 · 物理学 2025-09-26 Z. S. Yuan , Z. L. Wen , W. Xu , J. L. Han

Context. ULXs ($L_\textrm{X}>10^{39}$ erg s$^{-1}$) are excellent probes of accretion physics, star formation and IMBHs searches. As the sample size of X-ray data from modern observatories increases, producing extensive catalogues of ULXs…

高能天体物理现象 · 物理学 2022-03-30 M. C. i Bernadich , A. D. Schwope , K. Kovlakas , A. Zezas , I. Traulsen

One hundred seven ultraluminous X-ray (ULX) sources with 0.3-10.0 keV luminosities in excess of 1e39 erg/s are identified in a complete sample of 127 nearby galaxies. The sample includes all galaxies within 14.5 Mpc above the completeness…

高能天体物理现象 · 物理学 2015-05-30 Douglas A. Swartz , Roberto Soria , Allyn F. Tennant , Mihoko Yukita

We present a sample of 383 X-ray selected galaxy groups and clusters with spectroscopic redshift measurements (up to z ~ 0.79) from the 2XMMi/SDSS Galaxy Cluster Survey. The X-ray cluster candidates were selected as serendipitously detected…

宇宙学与河外天体物理 · 物理学 2014-03-05 A. Takey , A. Schwope , G. Lamer

Galaxy clusters are crucial to understanding role of the environment in galaxy evolution. However, due to their rarity, only a limited number of clusters have been identified at $z\gtrsim2$. In this paper, we report a discovery of seven…

We present a self-consistent approach to the modeling of X-ray clusters of galaxies in a flat universe. Employing the Press and Schechter (1974) formalism to derive the mass function and relating the observable properties of clusters to…

天体物理学 · 物理学 2016-08-30 J. Oukbir , J. G. Bartlett , A. Blanchard

The XMM-Newton Serendipitous Ultraviolet Source Survey (XMM-SUSS) is a catalogue of ultraviolet (UV) sources detected serendipitously by the Optical Monitor (XMM-OM) on-board the XMM-Newton observatory. The catalogue contains…

The COSMOS survey is a multiwavelength survey aimed to study the evolution of galaxies, AGN and the large scale structure. The XMM-COSMOS is a deep X-ray survey over the full 2 deg2 of the COSMOS area. It consists of 55 XMM-Newton pointings…

The comparison of the properties of galaxy cluster samples selected using observations in different wavebands may shed light on potential biases of the way in which the samples are assembled. For this comparison, we introduce a new…

宇宙学与河外天体物理 · 物理学 2024-04-22 S. Andreon , G. Trinchieri , A. Moretti

Determining the scaling relations between galaxy cluster observables requires large samples of uniformly observed clusters. We measure the mean X-ray luminosity--optical richness (L_X--N_200) relation for an approximately volume-limited…

Aims: We present a uniform catalog of the images and radial profiles of the temperature, abundance, and brightness for 70 clusters of galaxies observed by XMM-Newton. Methods: We use a new "first principles" approach to the modeling and…

天体物理学 · 物理学 2009-11-13 S. L. Snowden , R. M. Mushotzky , K. D. Kuntz , D. S. Davis

[Abridged] We study the X-ray properties of a color-selected sample of clusters at 0.1<z<0.3, to quantify the real aboundance of the population of X-ray dark or underluminous clusters and at the same time the spurious detection…

宇宙学与河外天体物理 · 物理学 2015-05-30 S. Andreon , A. Moretti

We present results from XMM-Newton observations of ten high-redshift ($0.81 < z < 1.17$) galaxy clusters selected from the CAMIRA catalog based on high richness ($N > 40$). These massive clusters, identified in the Hyper Suprime-Cam Subaru…

The Sloan Digital Sky Survey (SDSS) will provide a complete imaging and spectroscopic survey of the high-latitude northern sky. The 2D survey will image the sky in five colors and will contain nearly 5 x 107 galaxies to g ~ 23m. The…

天体物理学 · 物理学 2009-10-28 Neta A. Bahcall

We present the compilation and properties of a Meta-Catalogue of X-ray detected Clusters of galaxies, the MCXC. This very large catalogue is based on publicly available ROSAT All Sky Survey-based (NORAS, REFLEX, BCS, SGP, NEP, MACS, and…

宇宙学与河外天体物理 · 物理学 2015-05-19 R. Piffaretti , M. Arnaud , G. W. Pratt , E. Pointecouteau , J. -B. Melin

We use giga-particle N-body simulations to study galaxy cluster populations in Hubble Volumes of LCDM (Omega_m=0.3, Omega_Lambda=0.7) and tCDM (Omega_m=1) world models. Mapping past light-cones of locations in the computational space, we…

This contribution illustrates the study of galaxy clusters as astrophysical laboratories as well as probes for the large-scale structure of the Universe. Using the REFLEX Cluster Survey, the measurement of the statistics of the large-scale…

天体物理学 · 物理学 2009-11-07 Hans Boehringer
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