101 citations · 826 across the 67 of their papers we have counts for
6 papers · 1 filter
On the absence of gravitational lensing of the cosmic microwave background
Richard Lieu, Jonathan P. D. Mittaz
The magnification of distant sources by mass clumps at lower () redshifts is calculated analytically. The clumps are initially assumed to be galaxy group isothermal spher…
Average magnification effect of clumping of matter
T. W. B. Kibble, Richard Lieu
The aim of this paper is to re-examine the question of the average magnification in a universe with some inhomogeneously distributed matter. We present an analytic proof, valid und…
WHIM emission and the cluster soft excess: a model comparison
J. Mittaz, R. Lieu, R. Cen +1
The confirmation of the cluster soft excess (CSE) by XMM-Newton has rekindled interest as to its origin. The recent detections of CSE emission at large cluster radii together with…
Proving the conservation of surface brightness during the strong and weak lensing of light by an isothermal sphere
Richard Lieu
An analytical proof of the conservation of surface brightness during the strong and weak lensing of light by a singular isothermal sphere is provided. It is shown that the movement…
Are the WMAP angular magnification measurements consistent with an inhomogeneous critical density Universe?
R. Lieu, J. P. D. Mittaz
The propagation of light through a Universe of (a) isothermal mass spheres amidst (b) a homogeneous matter component, is considered. We demonstrate by an analytical proof that as l…
Warm gas in the outskirts of galaxy clusters -- The cluster soft excess phenomenon
M. Bonamente, R. Lieu, J. P. D. Mittaz
The cluster soft excess emission indicates the presence of large amounts of warm gas (T ~ 10^6 K) in the neighborhood of galaxy clusters. Among the clusters that display this pheno…