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THE SLOAN NEARBY CLUSTER WEAK LENSING SURVEY
(IOP PUBLISHING LTD, 2009)
We describe and present initial results of a weak lensing survey of nearby (z less than or similar to 0.1) galaxy clusters in the Sloan Digital Sky Survey (SDSS). In this first study, galaxy clusters are selected from the ...
Environmental dependence of the galaxy stellar mass function in the Dark Energy Survey Science Verification Data
(Oxford Univ Press, 2017-04-01)
Measurements of the galaxy stellar mass function are crucial to understand the formation of galaxies in the Universe. In a hierarchical clustering paradigm, it is plausible that there is a connection between the properties ...
TESTING THE DISTANCE-DUALITY RELATION WITH GALAXY CLUSTERS AND TYPE Ia SUPERNOVAE
(IOP PUBLISHING LTD, 2010)
In this Letter, we propose a new and model-independent cosmological test for the distance-duality (DD) relation, eta = D(L)(z)(1 + z)(-2)/D(A)(z) = 1, where D(L) and D(A) are, respectively, the luminosity and angular ...
AGN spiral galaxies in groups: effects of bars
(EDP Sciences, 2014-12)
AIMS: We explore properties of barred active spiral galaxies in groups and clusters selected from the Sloan Digital Sky Survey data release 7 (SDSS-DR7), with the aim of assessing the effects of bars on active galactic ...
Global properties of `ordinary` early-type galaxies: photometry and spectroscopy of stars and globular clusters in NGC 4494
(WILEY-BLACKWELL, 2011)
We present a comprehensive analysis of the spatial, kinematic and chemical properties of stars and globular clusters (GCs) in the `ordinary` elliptical galaxy NGC 4494 using data from the Keck and Subaru telescopes. We ...
Two formation channels of ultra-compact dwarf galaxies in Hickson compact groups
(EDP SCIENCES S A, 2011)
Context. The formation of ultra-compact dwarf galaxies (UCDs) is believed to be driven by interaction, and UCDs are abundant in the cores of galaxy clusters, environments that mark the end-point of galaxy evolution. Nothing ...
The influence of halo assembly on galaxies and galaxy groups
(Wiley Blackwell Publishing, Inc, 2009-12)
In this paper, we study the variations of group galaxy properties according to the assembly history in SDSS-DR6 selected groups. Using mock SDSS group catalogues, we find two suitable indicators of group formation time: ...
On the influence of non-thermal pressure on the mass determination of galaxy clusters
(EDP SCIENCES S A, 2010)
Aims. Given that in most cases just thermal pressure is taken into account in the hydrostatic equilibrium equation to estimate galaxy cluster mass, the main purpose of this paper is to consider the contribution of all three ...
Surveying galaxy proto-clusters in emission: a large-scale structure at z = 2.44 and the outlook for hetdex
(IOP Pub., 2015)
Galaxy proto-clusters at z greater than or similar to 2 provide a direct probe of the rapid mass assembly and galaxy growth of present-day massive clusters. Because of the need for precise galaxy redshifts for density ...
The signature of dark energy perturbations in galaxy cluster surveys
(IOP PUBLISHING LTD, 2009)
Models of dynamical dark energy unavoidably possess fluctuations in the energy density and pressure of that new component. In this paper we estimate the impact of dark energy fluctuations on the number of galaxy clusters ...