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The abundance and spatial distribution of ultra-diffuse galaxies in nearby galaxy clusters
Recent observations have highlighted a significant population of faint but large (r_eff>1.5 kpc) galaxies in the Coma cluster. The origin of these Ultra Diffuse Galaxies (UDGs) remains puzzling, as…
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DISCOVERY OF A GALAXY CLUSTER WITH A VIOLENTLY STARBURSTING CORE AT z = 2.506
We report the discovery of a remarkable concentration of massive galaxies with extended X-ray emission at zspec = 2.506, which contains 11 massive (M* ≳ 1011 M⊙) galaxies in the central 80 kpc region…
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The UV galaxy luminosity function at z = 3–5 from the CFHT Legacy Survey Deep fields
Aims. We measure and study the evolution of the UV galaxy luminosity function (LF) at z = 3−5 from the largest high-redshift survey to date, the Deep part of the CFHT Legacy Survey. We also give…
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Evidence for a change in the dominant satellite galaxy quenching mechanism at z = 1.
We present an analysis of galaxies in groups and clusters at 0.8 10(10.3) M-circle dot, we find f(convert) similar to 0.4 in the groups and similar to 0.6 in the clusters, similar to comparable…
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The environmental dependence of the stellar mass function at z ∼ 1 Comparing cluster and field between the GCLASS and UltraVISTA surveys
Aims. We present the stellar mass functions (SMFs) of star-forming and quiescent galaxies from observations of ten rich, red-sequence selected, clusters in the Gemini Cluster Astrophysics…
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The abundance of ultra-diffuse galaxies from groups to clusters: UDGs are relatively more common in more massive haloes
In recent years, many studies have reported substantial populations of large galaxies with low surface brightness in local galaxy clusters. Various theories that aim to explain the presence of such…
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Evidence for strong evolution in galaxy environmental quenching efficiency between z = 1.6 and z = 0.9
We analyse the evolution of environmental quenching efficiency, the fraction of quenched cluster galaxies that would be star-forming if they were in the field, as a function of redshift in 14…
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Stellar mass function of cluster galaxies at z ~ 1.5: Evidence for reduced quenching efficiency at high redshift
We present the stellar mass functions (SMFs) of passive and star-forming galaxies with a limiting mass of 10 10.1 M ⊙ in four spectroscopically confirmed Spitzer Adaptation of the Red-sequence…
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Grain growth across protoplanetary discs: 10 μm silicate feature versus millimetre slope
Context. Young stars are formed with dusty discs around them. The dust grains in the disc are originally of the same size as interstellar dust, i.e., of the order of 0.1 μm. Models predict that these…
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Constraints on the Alignment of Galaxies in Galaxy Clusters from $\sim$14,000 Spectroscopic Members
Torques acting on galaxies lead to physical alignments, but the resulting ellipticity correlations are difficult to predict. As they constitute a major contaminant for cosmic shear studies, it is…
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