88 citations · 342 across the 10 of their papers we have counts for
10 papers
Galaxy Cluster Mass Reconstruction Project - IV. Understanding the effects of imperfect membership on cluster mass estimation
R. Wojtak, L. Old, G. A. Mamon +17
The primary difficulty in measuring dynamical masses of galaxy clusters from galaxy data lies in the separation between true cluster members from interloping galaxies along the lin…
Inferring Gravitational Potentials from Mass Densities in Cluster-sized Halos
Christopher J. Miller, Alejo Stark, Daniel Gifford +1
We use N-body simulations to quantify how the escape velocity in cluster-sized halos maps to the gravitational potential in a LambdaCDM universe. Using spherical density-potential…
Stacking Caustic Masses from Galaxy Clusters
Daniel Gifford, Nicholas Kern, Christopher J. Miller
Ongoing and future spectroscopic surveys will measure numerous galaxy redshifts within tens of thousands of galaxy clusters. However, the sampling within these clusters will be low…
On Escaping a Galaxy Cluster in an Accelerating Universe
Alejo Stark, Christopher J. Miller, Daniel Gifford
We derive the escape velocity profile for an Einasto density field in an accelerating universe and demonstrate its physical viability by comparing theoretical expectations to both…
Probing Theories of Gravity with Phase Space-Inferred Potentials of Galaxy Clusters
Alejo Stark, Christopher J. Miller, Nicholas Kern +5
Modified theories of gravity provide us with a unique opportunity to generate innovative tests of gravity. In Chameleon f(R) gravity, the gravitational potential differs from the w…
The XMM Cluster Survey: evolution of the velocity dispersion -- temperature relation over half a Hubble time
Susan Wilson, Matt Hilton, Philip J. Rooney +26
We measure the evolution of the velocity dispersion--temperature (--) relation up to using a sample of 38 galaxy clusters drawn from the \textit{XMM}…
A Multi-Wavelength Mass Analysis of RCS2 J232727.6-020437, a ~3x10M Galaxy Cluster at z=0.7
K. Sharon, M. D. Gladders, D. P. Marrone +19
We present an initial study of the mass and evolutionary state of a massive and distant cluster, RCS2 J232727.6-020437. This cluster, at z=0.6986, is the richest cluster discovered…
Galaxy Cluster Mass Reconstruction Project: I. Methods and first results on galaxy-based techniques
L. Old, R. A. Skibba, F. R. Pearce +18
This paper is the first in a series in which we perform an extensive comparison of various galaxy-based cluster mass estimation techniques that utilise the positions, velocities an…
Velocity Anisotropy and Shape Bias in the Caustic Technique
Daniel Gifford, Christopher J. Miller
We use the Millennium Simulation to quantify the statistical accuracy and precision of the escape velocity technique for measuring cluster-sized halo masses at z~0.1. We show that…
A Systematic Analysis of Caustic Methods for Galaxy Cluster Masses
Daniel Gifford, Christopher J. Miller, Nicholas Kern
We quantify the expected observed statistical and systematic uncertainties of the escape velocity as a measure of the gravitational potential and total mass of galaxy clusters. We…