A KiDS weak lensing analysis of assembly bias in GAMA galaxy groups [PDF]
, 2017 We investigate possible signatures of halo assembly bias for spectroscopically selected galaxy groups from the Galaxy And Mass Assembly (GAMA) survey using weak lensing measurements from the spatially overlapping regions of the deeper, high-imaging ...
A. Dvornik +21 more
semanticscholar +1 more source
Detection of Missing Baryons in Galaxy Groups with Kinetic Sunyaev–Zel’dovich Effect [PDF]
Astrophysical Journal, 2017 We present the detection of the kinetic Sunyaev–Zel’dovich effect (kSZE) signals from groups of galaxies as a function of halo mass down to using the Planck cosmic microwave background maps and stacking about 40,000 galaxy systems with known positions ...
Seunghwan Lim +3 more
semanticscholar +1 more source
Radio galaxy feedback in X-ray selected groups from COSMOS: the effect on the ICM [PDF]
, 2010 We quantify the importance of the mechanical energy released by radio-galaxies inside galaxy groups. We use scaling relations to estimate the mechanical energy released by 16 radio-AGN located inside X-ray detected galaxy groups in the COSMOS field.
A. Finoguenov +44 more
core +4 more sources
LoCuSS : pre-processing in galaxy groups falling into massive galaxy clusters at z=0.2 [PDF]
, 2017 We report direct evidence of pre-processing of the galaxies residing in galaxy groups falling into galaxy clusters drawn from the Local Cluster Substructure Survey (LoCuSS). 34 groups have been identified via their X-ray emission in the infall regions of
M. Bianconi +5 more
semanticscholar +1 more source
Gas Contents of Galaxy Groups from Thermal Sunyaev–Zel’dovich Effects [PDF]
, 2017 A matched filter technique is applied to the Planck all-sky Compton y-parameter map to measure the thermal Sunyaev–Zel’dovich (tSZ) effect produced by galaxy groups of different halo masses selected from large redshift surveys in the low-z universe ...
Seunghwan Lim +6 more
semanticscholar +1 more source
The DEEP2 Galaxy Redshift Survey: The Voronoi-Delaunay Method Catalog of Galaxy Groups [PDF]
, 2012 We present a public catalog of galaxy groups constructed from the spectroscopic sample of galaxies in the fourth data release from the Deep Extragalactic Evolutionary Probe 2 (DEEP2) Galaxy Redshift Survey, including the Extended Groth Strip (EGS).
Aaron A. Dutton +49 more
core +10 more sources
Hierarchical inference of the relationship between Concentration and Mass in Galaxy Groups and Clusters [PDF]
, 2017 Mass is a fundamental property of galaxy groups and clusters. In theory weak gravitational lensing will enable an approximately unbiased measurement of mass, but parametric methods for extracting cluster masses from data require the additional knowledge ...
M. Lieu +5 more
semanticscholar +1 more source
Baryonically Closed Galaxy Groups [PDF]
, 2005 Elliptical galaxies and their groups having the largest L_x/L_B lie close to the locus in the L_x,L_B diagram expected for closed systems with baryon fractions equal to the cosmic mean value, f_b = 0.16.
Andreas Faltenbacher +7 more
core +2 more sources
Understanding `galaxy groups' as a unique structure in the universe [PDF]
, 2017 `Galaxy groups' have hardly been realised as a separate class of objects with specific characteristics in the structural hierarchy. The presumption that the self-similarity of dark matter structures is a valid prescription for the baryonic universe at ...
S. Paul +9 more
semanticscholar +1 more source
Galaxy interactions II: High density environments [PDF]
, 2011 With the aim to assess the role of dense environments in galaxy interactions, properties we present an analysis of close galaxy pairs in groups and clusters, obtained from the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7).
Abazajian +64 more
core +1 more source