X-Ray Studies of Clusters of Galaxies

2008 ◽  
pp. 395-434 ◽  
Author(s):  
H. Böhringer
Keyword(s):  
Clusters Of Galaxies ◽  
X Ray

scholarly journals A Systematic X‐Ray Search for Clusters of Galaxies behind the Milky Way. II. The Second CIZA Subsample

2007 ◽  
Vol 662 (1) ◽  
pp. 224-235 ◽  
Author(s):  
Dale D. Kocevski ◽  
Harald Ebeling ◽  
Chris R. Mullis ◽  
R. Brent Tully
Keyword(s):  
Milky Way ◽  
Clusters Of Galaxies ◽  
X Ray

scholarly journals On the relation between mini-halos and AGN feedback in clusters of galaxies

2020 ◽  
Vol 499 (2) ◽  
pp. 2934-2958
Author(s):  
A Richard-Laferrière ◽  
J Hlavacek-Larrondo ◽  
R S Nemmen ◽  
C L Rhea ◽  
G B Taylor ◽  
...  
Keyword(s):  
Large Scale ◽  
State Of The Art ◽  
Vital Role ◽  
Clusters Of Galaxies ◽  
Relativistic Jets ◽  
X Ray ◽  
Core Cluster ◽  
Central Galaxy ◽  
Central Regions ◽  
Radio Power

ABSTRACT A variety of large-scale diffuse radio structures have been identified in many clusters with the advent of new state-of-the-art facilities in radio astronomy. Among these diffuse radio structures, radio mini-halos are found in the central regions of cool core clusters. Their origin is still unknown and they are challenging to discover; less than 30 have been published to date. Based on new VLA observations, we confirmed the mini-halo in the massive strong cool core cluster PKS 0745−191 (z = 0.1028) and discovered one in the massive cool core cluster MACS J1447.4+0827 (z = 0.3755). Furthermore, using a detailed analysis of all known mini-halos, we explore the relation between mini-halos and active galactic nucleus (AGN) feedback processes from the central galaxy. We find evidence of strong, previously unknown correlations between mini-halo radio power and X-ray cavity power, and between mini-halo and the central galaxy radio power related to the relativistic jets when spectrally decomposing the AGN radio emission into a component for past outbursts and one for ongoing accretion. Overall, our study indicates that mini-halos are directly connected to the central AGN in clusters, following previous suppositions. We hypothesize that AGN feedback may be one of the dominant mechanisms giving rise to mini-halos by injecting energy into the intra-cluster medium and reaccelerating an old population of particles, while sloshing motion may drive the overall shape of mini-halos inside cold fronts. AGN feedback may therefore not only play a vital role in offsetting cooling in cool core clusters, but may also play a fundamental role in re-energizing non-thermal particles in clusters.

scholarly journals A ROSAT study of the cores of clusters of galaxies -- I. Cooling flows in an X-ray flux-limited sample

1998 ◽  
Vol 298 (2) ◽  
pp. 416-432 ◽  
Author(s):  
C. B. Peres ◽  
A. C. Fabian ◽  
A. C. Edge ◽  
S. W. Allen ◽  
R. M. Johnstone ◽  
...  
Keyword(s):  
Clusters Of Galaxies ◽  
Limited Sample ◽  
X Ray ◽  
Cooling Flows

scholarly journals X-Ray Emission from Clusters of Galaxies

1984 ◽  
Vol T7 ◽  
pp. 157-162 ◽  
Author(s):  
R F Mushotzky
Keyword(s):  
Clusters Of Galaxies ◽  
X Ray

scholarly journals X-ray clusters of galaxies as tracers of structure in the Universe

Nature ◽  
2001 ◽  
Vol 409 (6816) ◽  
pp. 39-45 ◽  
Author(s):  
Stefano Borgani ◽  
Luigi Guzzo
Keyword(s):  
Clusters Of Galaxies ◽  
X Ray ◽  
The Universe

Extragalactic X-ray sources and the diffuse X-ray background

1979 ◽  
Vol 366 (1726) ◽  
pp. 391-402 ◽  
Keyword(s):  
Spatial Distribution ◽  
Euclidean Space ◽  
Active Galaxies ◽  
Clusters Of Galaxies ◽  
Optical Identification ◽  
X Ray ◽  
Luminosity Functions ◽  
Sky Survey ◽  
Order Of Magnitude ◽  
X Ray Background

Results from the Ariel 5 sky survey instrument relating to the properties and the spatial distribution of extragalactic X-ray sources are discussed. The lg N -lg S relation for sources in the 2A catalogue is consistent with a uniform distribution of sources in Euclidean space. In addition, measure­ments of fluctuations in the X-ray background suggest that the Euclidean form of the source counts can be extrapolated to flux levels at least an order of magnitude fainter than the 2A catalogue limit. Information is also available from the optical identification of 2A sources which, through redshift measurements, enables the X-ray luminosity functions of the two main classes of source, namely clusters of galaxies and active galaxies, to be determined. The luminosity functions can be used to calculate the contribution of clusters of galaxies and active galaxies to the diffuse X-ray background in the 2-10 keV range. It is found that cosmological evolution of one or both populations is required to account for the diffuse X-ray background entirely in terms of the integrated emission from these sources.

scholarly journals The Evolution of Structure in X‐Ray Clusters of Galaxies

2005 ◽  
Vol 624 (2) ◽  
pp. 606-629 ◽  
Author(s):  
Tesla E. Jeltema ◽  
Claude R. Canizares ◽  
Mark W. Bautz ◽  
David A. Buote
Keyword(s):  
Clusters Of Galaxies ◽  
X Ray ◽  
Evolution Of Structure

Weak Gravitational Lensing by a Sample of X‐Ray–luminous Clusters of Galaxies. II. Comparison with Virial Masses

2002 ◽  
Vol 579 (1) ◽  
pp. 227-235 ◽  
Author(s):  
Ragnvald J. Irgens ◽  
Per B. Lilje ◽  
Hakon Dahle ◽  
S. J. Maddox
Keyword(s):  
Gravitational Lensing ◽  
Clusters Of Galaxies ◽  
Weak Gravitational Lensing ◽  
X Ray

scholarly journals X-ray Morphology of Clusters of Galaxies and its Application

2006 ◽  
Vol 2 (S235) ◽  
pp. 203-203
Author(s):  
Y. Hashimoto ◽  
H. Boehringer ◽  
J. P. Henry ◽  
G. Hasinger ◽  
G. Szokoly
Keyword(s):  
Clusters Of Galaxies ◽  
X Ray ◽  
Cluster Morphology

AbstractWe report our study of X-ray cluster morphology using a sample of 101 clusters of galaxies at redshift z~0.05-1 taken from the Chandra archive.

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