Galaxy groups and clusters
Observability of intermittent radio sources in galaxy groups and clusters
... It is well accepted that outflows from active galactic nuclei (AGNs) play an important role in slowing cooling flows (see reviews by e.g. McNamara & Nulsen 2007; Alexander & Hickox 2012; Fabian 2012). The details ...
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Stellar mass halo mass relation for the brightest central galaxies of X ray clusters since z~0 65
... of galaxy groups and clusters extracted from the deeper AEGIS, CDFS, COSMOS, XMM-CFHTLS, and XMM-XXL surveys to study the stellar mass - halo mass relation using the largest sample of X-ray ...
9
Advanced stream search for galaxy clusters with multifrequency microwave data
... selecting galaxy cluster candidates using catalogs of radio sources and maps of cosmic microwave background ...distant galaxy groups or galaxy protoclusters in the center of which they are ...
8
Weak-lensing-inferred scaling relations of galaxy clusters in the RCS2: mass-richness, mass-concentration, mass-bias, and more
... of clusters and galaxy groups by stacking their lensing signals ...of clusters. The lensing signal of all but the most massive clusters is generally noisy; only by stacking the signal ...
22
Enrichment of the Hot Intracluster Medium: Observations
... cool-core clusters were naturally thought to be explained by the low-mass stellar population from the central brightest cluster galaxy (BCG) as, unlike our Milky Way, the latter is usually red-and-dead with ...
49
The Hydrangea simulations: galaxy formation in and around massive clusters
... a galaxy stellar mass function (GSMF) in the field that agrees with observations ...of galaxy sizes and star formation rates (SFRs, Furlong et ...of galaxy groups on atomic hydrogen (Marasco ...
23
GAMA+KiDS: Alignment of galaxies in galaxy groups and its dependence on galaxy scale
... the galaxy group, we conclude that the outer regions of the BGG are aligned more strongly with the group halo shape than the inner ...a galaxy group follow the ellipticity of the group’s ...into ...
12
Giodini, Stefania (2010): Galaxy groups in the COSMOS survey: cosmic laboratories for galaxy evolution and feedback. Dissertation, LMU München: Fakultät für Physik
... cosmic value measured by WMAP, while the f 500 stars+gas+depl+ICL found for an average group differs from it at more than 3σ. Given the heterogeneity of the sample (see e.g. Figure 16b), for some objects the gap between ...
137
Weak Lensing Calibrated M-T Scaling Relation of Galaxy Groups in the COSMOS Field
... luminosity clusters drawn from the 160 square degree survey (160SD; Vikhlinin et ...massive clusters that were studied as part of the Canadian Clus- ter Comparison Project ...
11
The detection and X-ray evolution of galaxy groups at high redshift
... from clusters to groups (Cavaliere, Menci & Tozzi 1999; Wu, Fabian & Nulsen 1998, 2000; Balogh, Babul & Patton 1999; Bower et ...low-redshift groups has provided direct evidence of energy ...
11
The stability of buoyant bubbles in the atmospheres of galaxy clusters
... Two bubbles associated with the currently active AGN in the central galaxy NGC 1275 are detected both as depressions in the X-ray surface brightness and in synchrotron radio emission (e.g. Fabian et al., 2000). ...
12
Cosmic particle acceleration by shocks and turbulence in merging galaxy clusters
... sub- clusters/groups during which a part of the gravitational energy goes into particle acceleration and amplification of large-scale magnetic fields (for re- views, see Bruggen et ...
177
Deep CEE I:Fishing for Galaxy Clusters with Deep Neural Nets
... the galaxy cluster centre (Abell et al. 1989). This means that these galaxy clusters would have strong signal- to-noise and are very likely to be real gravitationally bound ...Abell galaxy ...
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Expectations for an interferometric Sunyaev Zeldovich effect survey for galaxy clusters
... These results are quite exciting, because they indicate that an SZE survey will yield a large cluster catalog ex- tending to high redshift. If the currently favored ΛCDM model is correct, then we expect to detect 300 ...
7
Iron abundance distribution in the hot gas of merging galaxy clusters
... gion. Interestingly, 1RXSJ0603 exhibits a relative low-entropy core associated with the abundance peak. One natural interpre- tation is that this region is the remainder of cool core after the merging activity, which ...
21
Merging Cluster Collaboration: Optical and Spectroscopic Survey of a Radio-selected Sample of 29 Merging Galaxy Clusters
... Merging galaxy clusters have been established as fruitful astrophysical ...two galaxy clusters have collided and the effectively collisionless galaxies and dark matter ( DM ) have become ...
14
Biases in the estimation of velocity dispersions and dynamical masses for galaxy clusters
... the clusters that are outside the virial sphere (according to the definition given in [9]), but that, due to projection effects appear within a smaller radius; ...
6
What are protoclusters? – Defining high redshift galaxy clusters and protoclusters
... environmental quenching of low-mass star-forming galaxies. This effect is exacerbated if the observations are concentrated on the main halo where environmental quenching is strongest (Fig. 13). Observations taken with ...
12
Using the Outskirts of Galaxy Clusters to Determine their Mass Accretion Rate
... Abstract: We [1] explore the possibility of using the external regions of galaxy clusters to measure their mass accretion rate (MAR). The main goal is to provide a method to observationally investigate the ...
6
Peering into the Past - Cosmology as a Tool for Constraining GR
... From structure formation, we know that the Λ-like component can not clump on the scales cov- ered by the galaxy surveys and below. Thus, it must be something different from standard matter and radiation and even ...
6