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相关论文: The Lx-Yx Relation: Using Galaxy Cluster X-Ray Lum…

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The usage of the radius-luminosity (R-L) relation for the determination of black hole masses across the cosmic history as well as its application for cosmological studies motivates us to analyze its scatter, which has recently increased…

星系天体物理 · 物理学 2020-11-11 Mary Loli Martínez-Aldama , Michal Zajaček , Bożena Czerny , Swayamtrupta Panda

We compare cluster scaling relations published for three different samples selected via X-ray and Sunyaev-Zel'dovich (SZ) signatures. We find tensions driven mainly by two factors: i) systematic differences in the X-ray cluster observables…

宇宙学与河外天体物理 · 物理学 2015-06-04 Eduardo Rozo , August E. Evrard , Eli S. Rykoff , James G. Bartlett

A precise understanding of the relations between observable X-ray properties of galaxy clusters and cluster mass is a vital part of the application of X-ray galaxy cluster surveys to test cosmological models. An understanding of how these…

宇宙学与河外天体物理 · 物理学 2015-05-30 A. Reichert , H. Böhringer , R. Fassbender , M. Mühlegger

This is the third of a series of papers in which we derive simultaneous constraints on cosmological parameters and X-ray scaling relations using observations of the growth of massive, X-ray flux-selected galaxy clusters. Our data set…

宇宙学与河外天体物理 · 物理学 2015-05-14 David Rapetti , Steven W. Allen , Adam Mantz , Harald Ebeling

We present a theoretical model which aims at predicting the clustering properties of X-ray clusters in flux-limited surveys for different cosmological scenarios. The model uses the theoretical and empirical relations between mass,…

天体物理学 · 物理学 2007-05-23 Lauro Moscardini , Sabino Matarrese , Francesco Lucchin , Sabrina De Grandi , Piero Rosati

We present the first measurement of the mass function of galaxy clusters based directly on cluster masses derived from observations of weak gravitational lensing. To investigate the degree of sample incompleteness resulting from the X-ray…

天体物理学 · 物理学 2009-02-06 H. Dahle

Using XMM-Newton observations, we investigate the scaling and structural properties of the ICM entropy in a sample of 10 nearby (z < 0.2) relaxed galaxy clusters in the temperature range 2-9 keV. We derive the local entropy-temperature…

天体物理学 · 物理学 2009-11-13 G. W. Pratt , M. Arnaud , E. Pointecouteau

We present the X-ray luminosity (L) versus dynamical mass (M) relation for 63 nearby clusters in the HIFLUGCS. The luminosity measurements are obtained based on ~1.3 Ms of clean XMM data and ROSAT pointed observations. The masses are…

The abundance of clusters of galaxies is known to be a potential source of cosmological constraints through their mass function. In the present work, we examine the information that can be obtained from the temperature distribution function…

宇宙学与河外天体物理 · 物理学 2017-05-01 Stéphane Ilic , Alain Blanchard , Marian Douspis

We present a statistical study of the occurrence and effects of the cooling cores in the clusters of galaxies in a flux-limited sample, HIFLUGCS, based on ROSAT and ASCA observations. About 49% of the clusters in this sample have a…

天体物理学 · 物理学 2009-11-13 Y. Chen , T. H. Reiprich , H. Böhringer , Y. Ikebe , Y. -Y. Zhang

We present joint X-ray and optical observations of the high redshift (z~0.83) lensing cluster CLJ0152.7-1357 made with the Chandra X-ray Observatory and the Keck telescope. We confirm the existence of significant substructure at both X-ray…

天体物理学 · 物理学 2015-06-24 Zhi-Ying Huo , Sui-Jian Xue , Haiguang Xu , Gordon Squires , Piero Rosati

In this paper, we introduce PICACS, a physically-motivated, internally consistent model of scaling relations between galaxy cluster masses and their observable properties. This model can be used to constrain simultaneously the form, scatter…

宇宙学与河外天体物理 · 物理学 2015-06-12 B. J. Maughan

Richness, i.e., the number of bright cluster galaxies, is known to correlate with the cluster mass, however, to exploit it as mass proxy we need a way to estimate the aperture in which galaxies should be counted that minimizes the scatter…

宇宙学与河外天体物理 · 物理学 2015-10-28 S. Andreon

We measure the evolution of the X-ray luminosity-temperature (L_X-T) relation since z~1.5 using a sample of 211 serendipitously detected galaxy clusters with spectroscopic redshifts drawn from the XMM Cluster Survey first data release…

The application to observational data of the generalized scaling relations (gSR) presented in Ettori et al. (2012) is here discussed. We extend further the formalism of the gSR in the self-similar model for X-ray galaxy clusters, showing…

宇宙学与河外天体物理 · 物理学 2015-06-16 S. Ettori

This is the third of a series of papers of low X-ray luminosity galaxy clusters. In this work we present the weak lensing analysis of eight clusters, based on observations obtained with the Gemini Multi-Object Spectrograph in the $g'$, $r'$…

We present the stellar mass-halo mass scaling relation for 46 X-ray selected low-mass clusters or groups detected in the XMM-BCS survey with masses $2\times10^{13}M_{\odot}\lesssim M_{500}\lesssim2.5\times10^{14}M_{\odot}$ at redshift…

星系天体物理 · 物理学 2016-02-17 I. Chiu , A. Saro , J. Mohr , S. Desai , S. Bocquet , R. Capasso , C. Gangkofner , N. Gupta , J. Liu

It is shown that galaxy cluster surveys selecting clusters by their X-ray luminosity effectively select by cluster mass. It is shown that a selection based solely on Abell galaxy richness is less efficient in terms of mass. Furthermore the…

天体物理学 · 物理学 2009-10-31 Thomas H. Reiprich , Hans Boehringer

We present spatially-resolved X-ray spectroscopy of the luminous lensing cluster Abell 2390, using observations made with the Chandra observatory. The temperature of the X-ray gas is shown to rise with increasing radius within the central…

天体物理学 · 物理学 2008-11-26 S. W. Allen , S. Ettori , A. C. Fabian

(Abridged) We present a morphological analysis of 17 X-ray selected clusters at z~0.25, imaged uniformly with HST WFPC2. Eight of these clusters have low X-ray luminosities (<10^{44} erg/s), while the remaining nine clusters have…

天体物理学 · 物理学 2009-11-07 Michael Balogh , Ian Smail , R. Bower , B. Ziegler , G. Smith , R. Davies , A. Gaztelu , J. -P. Kneib , H. Ebeling