378 citations · 889 across the 15 of their papers we have counts for
15 papers
The XXL survey: first results and future
M. Pierre, C. Adami, M. Birkinshaw +108
The XXL survey currently covers two 25 sq. deg. patches with XMM observations of ~10ks. We summarise the scientific results associated with the first release of the XXL data set, t…
Impact of baryons on the cluster mass function and cosmological parameter determination
Sam J. Cusworth, Scott T. Kay, Richard A. Battye +1
Recent results by the Planck collaboration have shown that cosmological parameters derived from the cosmic microwave background anisotropies and cluster number counts are in tensio…
The evolution of galaxy cluster X-ray scaling relations
C. J. Short, P. A. Thomas, O. E. Young +3
We use numerical simulations to investigate, for the first time, the joint effect of feedback from supernovae (SNe) and active galactic nuclei (AGN) on the evolution of galaxy clus…
Formation of ultra-compact dwarf galaxies: tests of the galaxy threshing scenario in Fornax
P. A. Thomas, M. J. Drinkwater, E. Evstigneeva
This paper investigates the possibility that UCD galaxies in the Fornax cluster are formed by the threshing of nucleated, early-type dwarf galaxies (hereafter dwarf galaxies). Simi…
The merger history of clusters and its effect on the X-ray properties of the intracluster medium
David R. Rowley, Peter A. Thomas, Scott T. Kay
We investigate the growth over time of 20 massive (> 3 keV) clusters in a hydrodynamical simulation of the LambdaCDM cosmology with radiative cooling. The clusters show a variety o…
The effect of radiative cooling on scaling laws of X-ray groups and clusters
O. Muanwong, P. A. Thomas, S. T. Kay +2
We have performed cosmological simulations in a CDM cosmology with and without radiative cooling, in order to study the effect of cooling on the cluster scaling relations. Our s…
How big were the first cosmological objects?
Roger M. Hutchings, F. Santoro, P. A. Thomas +1
We calculate the cooling times at constant density for halos with virial temperatures from 100 K to 10^5 K that originate from a 3-sigma fluctuation of a CDM power spectrum in thre…
A simluated TCDM cosmology cluster catalogue: the NFW profile and the temperature-mass scaling relations
P. A. Thomas, O. Muanwong, F. R. Pearce +4
We have extracted over 400 clusters, covering more than 2 decades in mass, from three simulations of the TCDM cosmology. This represents the largest, uniform catalogue of simulated…
The Alignment of Clusters using Large Scale Simulations
L. I. Onuora, P. A. Thomas
The alignment of clusters of galaxies with their nearest neighbours and between clusters within a supercluster is investigated using simulations of 512^{3} dark matter particles fo…
Weak gravitational lensing in the standard Cold Dark Matter model, using an algorithm for three-dimensional shear
Andrew J. Barber, Peter A. Thomas, H. M. P. Couchman
We investigate the effects of weak gravitational lensing in the standard Cold Dark Matter cosmology, using an algorithm which evaluates the shear in three dimensions. The algorithm…
P3M-SPH simulations of the Lyman-alpha Forest
Tom Theuns, Anthony Leonard, George Efstathiou +2
(Abridged) We investigate the importance of several numerical artifacts such as lack of resolution on spectral properties of the Lyman alpha forest as computed from cosmological hy…
Genus Statistics of the Virgo N-body simulations and the 1.2-Jy Redshift Survey
V. Springel, S. D. M. White, J. M. Colberg +8
We study the topology of the Virgo N-body simulations and compare it to the 1.2-Jy redshift survey of IRAS galaxies by means of the genus statistic. Four high-resolution simulation…
The Baryon Catastrophe and the multiphase intracluster medium
K. F. Gunn, P. A. Thomas
We review the theories and observations which together have led to the concept of the Baryon Catastrophe: observations of the baryon fraction on the scale of clusters of galaxies a…
Quasar-galaxy associations
P. A. Thomas, R. L. Webster, M. J. Drinkwater
There is controversy about the measurement of statistical associations between bright quasars and faint, presumably foreground galaxies. We look at the distribution of galaxies aro…
On the probability of major-axis precession in triaxial ellipsoidal potentials
P. A. Thomas, S. Vine, F. R. Pearce
Orbits in triaxial ellipsoidal potentials precess about either the major or minor axis of the ellipsoid. In standard perturbation theory it can be shown that a circular orbit will…